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A weekly game night where students from
Peak to Peak Charter School can
hang out and play Among Us together!
How do I join?
Click here to join the P2P Hack Club discord server. Discord is a video calling and chatting service that we use to video call, as well as chatting throughout the week. We host HGN on our discord, as well as post announcements about P2P Hack Club and other school-related events.
 If needed, we will ask for further verification that you are someone from Peak to Peak.
Wait to be verified. This usually takes a couple of minutes, but it could take up to a day for a server moderator to verify you. Please be patient, because we have a small moderation team!
Once you are verified, you are officially a member of the server! When the call is about to start, join the "Main Room" voice channel, and you will be in the call!
until Among Us Game Night's call!
Among Us Game Night is officially happening right now!


{% extends "base.html" %} {% block title %}Worlds at War - Registration Closed.{% endblock %} {% block content %}
Due to the many bugs I am making this a closed beta until things stabilise somewhat.


The Funky E-Card Slideshow
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"Mother's don't sleep.  "


Downs Provide Zwane & Sirino Update
by Mazola MolefeGaston Sirino could be fit to boost the Mamelodi Sundowns attack for their away Telkom Knockout semi-final clash against Golden Arrows, assistant coach Manqoba Mnqgithi has said, though he ruled out Themba Zwane.
Read: PSL Club Turns To MDC Team For Players
The duo have been missing through injury, with Sirino sitting out the club’s two previous games and Zwane declared unavailable in the previous four.
Zwane also had to be withdrawn from the Bafana Bafana squad that faced Ghana and Sudan in the 2021 Africa Cup of Nations qualifiers this month.
“We have really missed them, a lot. They are very important to our team, ‘Mshishi’ (Zwane) in particular, really dictates the tempo of the game and gives that sense of dominance when opponents are coming at us. That is why we have him because we know he is important. He is still not going to make it for this match,” Mnqgithi said on Wednesday.
“But Gaston is back. He is in full training and he has done very well and we believe he will be able to make the squad for the match. We have been unfortunate, but putting excuses does not help. We have lost a lot of offensive players that were looking to have a big influence in our game like Phakamani Mahlambi and Keletso Makgalwa – the players we thought would use their speed and precision to help us.”


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White to play 16
pips White=160 Black=161
(CorrectAnswer= 0/0, ErrorScore= 0)
1. Bar/24 7/1 eq: -0.0669 51.70% (G:21.09% B:0.66%) 48.30% (G:12.90% B:0.72%) 2. Bar/24 13/7 eq: -0.2118 (-0.1449) 48.24% (G:17.41% B:0.78%) 51.76% (G:15.07% B:1.01%) 3. Bar/18 eq: -0.3527 (-0.2858) 45.13% (G:14.31% B:0.59%) 54.87% (G:18.24% B:1.44%) 4. Bar/24 8/2 eq: -0.6230 (-0.5561) 38.68% (G:12.42% B:0.45%) 61.32% (G:24.53% B:3.01%)


Overview
Project Zouwu: Analytics Zoo Time Series for Telco
Project Zouwu provides a reference solution that is designed and optimized for common time series applications in the Telco industry, including:
- Use case - reference time series use cases in the Telco industry (such as network traffic forcasting, etc.)
- Model - built-in deep learning models for time series analysis (such as LSTM, MTNet and TCMF)
- AutoTS - AutoML support for building end-to-end time series analysis pipelines (including automatic feature generation, model selection and hyperparameter tuning).
Forecasting
Time series forecasting has many applications in telco. Accurate forecast of telco KPIs (e.g. traffic, utilizations, user experience, etc.) for communication networks ( 2G/3G/4G/5G/wired) can help predict network failures, allocate resource, or save energy. Time series forecasting can also be used for log and metric analysis for data center IT operations for telco. Metrics to be analyzed can be hardware or VM utilizations, database metrics or servce quality indicators.
We provided a reference use case where we forecast network traffic KPI's as a demo. Refer to Network Traffic for forecasting.
To learn how to use built-in models, refer to tutorials (i.e. LSTMForecaster and MTNetForcaster, TCMFForecaster) and API docs (i.e. LSTMForecaster, MTNetForecaster) and TCMFForecaster for built-in models.
To learn how to use AutoTS, refer to AutoTS tutorial and API docs (i.e. AutoTSTrainer and TSPipeline) for automated training.


--- layout: page title: Monocodes type: screening ---
Monocodes
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Watch excerpt: https://www.youtube.com/watch?v=HCYm7MsrSyM


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A doctor and son missing in Mawlamyaing
by Bo Bo MyintA doctor and his three-year-old son have been missing for four days and their family had reported it to the police.
Dr Aye Zaw Tun and his son, San Thuta Mon, ate dinner with Myo Min Aung and Waiyan Tun, friends of Dr Aye Zaw Tun, on December 5 and went back home around 10 pm. However, Dr Aye Zaw Tun and his son didn’t come back that night. His father, Aye Hlaing, reported it to Mupon police station.
“He closed his clinics around 8 pm and ate dinner. He went out with his son after that. When I looked for him after ten, he didn’t arrive home. At that time, his mother went to listen to religious talk. They didn’t arrive home after his mother came back home. We slept and found his room still remained shut after I woke up during the night. I thought they are sleeping. I saw his door is opened in the morning and thought he is preparing to open his clinic. When his wife called me and asked for him, I found out that he is not in his room. By then, I am sure that they didn’t come back last night,” said Myint Myint Sein, a cousin of the missing doctor.
“We are worried that they are still missing. His father said he will go out and search for them. I told him not to go out at night and will search for them in the morning. We rang his mobile phone but it was switched off,” said his mother Mya Mya Win.
Police, social welfare associations and his friends are looking for him.
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| Total net profit | -1.17 | Gross profit | 12.24 | Gross loss | -13.41 |
| Profit factor | 0.91 | Expected payoff | -0.02 | ||
| Absolute drawdown | -2.44 | Maximal drawdown (%) | 4.77 (204.72%) | ||
| Total trades | 59 | Profit trades (% of total) | 34 (57.63%) | Loss trades (% of total) | 25 (42.37%) |
| Long positions (won %) | 30 (56.67%) | Short positions (won %) | 29 (58.62%) | ||
| Largest | profit trade | 2.0 | loss trade | -1.16 | |
| Average | profit trade | 0.36 | loss trade | -0.54 | |
| Minimum | profit trade | 0.0 | loss trade | -0.25 | |
| Maximum | take profit in pips | 46.4 | stop loss in pips | -32.2 | |
| Average | take profit in pips | 8.0 | stop loss in pips | -15.0 | |
| Minimum | take profit in pips | -0.7 | stop loss in pips | -5.6 | |
| Maximum | Reward-Risk | 2.7 | Duration in minutes | 1658 | |
| Average | Reward-Risk | 0.6 | Duration in minutes | 181.4 | |
| Minimum | Reward-Risk | 0.0 | Duration in minutes | 0 | |
| Maximum | consecutive wins (profit in money) | 8.0 (4.0) | consecutive losses (loss in money) | 4.0 (-2.27) | |
| Average | consecutive wins | 2.0 | consecutive losses | 1.0 |
| Total net profit | -3.95 | Gross profit | 3.49 | Gross loss | -7.44 |
| Profit factor | 0.47 | Expected payoff | -0.13 | ||
| Absolute drawdown | -3.95 | Maximal drawdown (%) | 4.72 (612.99%) | ||
| Total trades | 30 | Profit trades (% of total) | 17 (56.67%) | Loss trades (% of total) | 13 (46.67%) |
| Largest | profit trade | 0.43 | loss trade | -1.16 | |
| Average | profit trade | 0.21 | loss trade | -0.57 | |
| Minimum | profit trade | 0.0 | loss trade | -0.37 | |
| Maximum | take profit in pips | 10.4 | stop loss in pips | -32.2 | |
| Average | take profit in pips | 4.9 | stop loss in pips | -16.4 | |
| Minimum | take profit in pips | -0.7 | stop loss in pips | -9.1 | |
| Maximum | Reward-Risk | 1.0 | Duration in minutes | 1082.0 | |
| Average | Reward-Risk | 0.4 | Duration in minutes | 209.6 | |
| Minimum | Reward-Risk | 0.0 | Duration in minutes | 0.0 | |
| Maximum | consecutive wins (profit in money) | 4.0 (0.83) | consecutive losses (loss in money) | 3.0 (-2.02) | |
| Average | consecutive wins | 1.0 | consecutive losses | 1.0 |
| Total net profit | 2.78 | Gross profit | 8.75 | Gross loss | -5.97 |
| Profit factor | 1.47 | Expected payoff | 0.1 | ||
| Absolute drawdown | 0.32 | Maximal drawdown (%) | 2.49 (62.25%) | ||
| Total trades | 29 | Profit trades (% of total) | 17 (58.62%) | Loss trades (% of total) | 12 (41.38%) |
| Largest | profit trade | 2.0 | loss trade | -0.81 | |
| Average | profit trade | 0.51 | loss trade | -0.5 | |
| Minimum | profit trade | 0.07 | loss trade | -0.25 | |
| Maximum | take profit in pips | 46.4 | stop loss in pips | -30.0 | |
| Average | take profit in pips | 11.2 | stop loss in pips | -13.6 | |
| Minimum | take profit in pips | 1.0 | stop loss in pips | -5.6 | |
| Maximum | Reward-Risk | 2.7 | Duration in minutes | 1658.0 | |
| Average | Reward-Risk | 0.9 | Duration in minutes | 152.1 | |
| Minimum | Reward-Risk | Duration in minutes | 2.0 | ||
| Maximum | consecutive wins (profit in money) | 5.0 (3.48) | consecutive losses (loss in money) | 3.0 (-1.59) | |
| Average | consecutive wins | 1.0 | consecutive losses | 1.0 |


Akan naming system is a website that takes your birthday details and calculates the day of the week you were born and then depending on your gender, outputs your Akan Name. Akan names are derived from Ghanian culture. Frequently in Ghana, children are given their first name as a 'day name' which corresponds to the day in the week they were born.
To find your Akan name fill the form and click submit


|
PX4 Firmware
PX4 Autopilot Software http://px4.io
|
Parameters required for temperature compensation of barometers. More...
Go to the source code of this file.
Functions | |
| PARAM_DEFINE_INT32 (TC_B_ENABLE, 0) | |
| Thermal compensation for barometric pressure sensors. More... | |
| PARAM_DEFINE_INT32 (TC_B0_ID, 0) | |
| ID of Barometer that the calibration is for. More... | |
| PARAM_DEFINE_FLOAT (TC_B0_X5, 0.0f) | |
| Barometer offset temperature ^5 polynomial coefficient. More... | |
| PARAM_DEFINE_FLOAT (TC_B0_X4, 0.0f) | |
| Barometer offset temperature ^4 polynomial coefficient. More... | |
| PARAM_DEFINE_FLOAT (TC_B0_X3, 0.0f) | |
| Barometer offset temperature ^3 polynomial coefficient. More... | |
| PARAM_DEFINE_FLOAT (TC_B0_X2, 0.0f) | |
| Barometer offset temperature ^2 polynomial coefficient. More... | |
| PARAM_DEFINE_FLOAT (TC_B0_X1, 0.0f) | |
| Barometer offset temperature ^1 polynomial coefficients. More... | |
| PARAM_DEFINE_FLOAT (TC_B0_X0, 0.0f) | |
| Barometer offset temperature ^0 polynomial coefficient. More... | |
| PARAM_DEFINE_FLOAT (TC_B0_SCL, 1.0f) | |
| Barometer scale factor - X axis. More... | |
| PARAM_DEFINE_FLOAT (TC_B0_TREF, 40.0f) | |
| Barometer calibration reference temperature. More... | |
| PARAM_DEFINE_FLOAT (TC_B0_TMIN, 5.0f) | |
| Barometer calibration minimum temperature. More... | |
| PARAM_DEFINE_FLOAT (TC_B0_TMAX, 75.0f) | |
| Barometer calibration maximum temperature. More... | |
| PARAM_DEFINE_INT32 (TC_B1_ID, 0) | |
| ID of Barometer that the calibration is for. More... | |
| PARAM_DEFINE_FLOAT (TC_B1_X5, 0.0f) | |
| Barometer offset temperature ^5 polynomial coefficient. More... | |
| PARAM_DEFINE_FLOAT (TC_B1_X4, 0.0f) | |
| Barometer offset temperature ^4 polynomial coefficient. More... | |
| PARAM_DEFINE_FLOAT (TC_B1_X3, 0.0f) | |
| Barometer offset temperature ^3 polynomial coefficient. More... | |
| PARAM_DEFINE_FLOAT (TC_B1_X2, 0.0f) | |
| Barometer offset temperature ^2 polynomial coefficient. More... | |
| PARAM_DEFINE_FLOAT (TC_B1_X1, 0.0f) | |
| Barometer offset temperature ^1 polynomial coefficients. More... | |
| PARAM_DEFINE_FLOAT (TC_B1_X0, 0.0f) | |
| Barometer offset temperature ^0 polynomial coefficient. More... | |
| PARAM_DEFINE_FLOAT (TC_B1_SCL, 1.0f) | |
| Barometer scale factor - X axis. More... | |
| PARAM_DEFINE_FLOAT (TC_B1_TREF, 40.0f) | |
| Barometer calibration reference temperature. More... | |
| PARAM_DEFINE_FLOAT (TC_B1_TMIN, 5.0f) | |
| Barometer calibration minimum temperature. More... | |
| PARAM_DEFINE_FLOAT (TC_B1_TMAX, 75.0f) | |
| Barometer calibration maximum temperature. More... | |
| PARAM_DEFINE_INT32 (TC_B2_ID, 0) | |
| ID of Barometer that the calibration is for. More... | |
| PARAM_DEFINE_FLOAT (TC_B2_X5, 0.0f) | |
| Barometer offset temperature ^5 polynomial coefficient. More... | |
| PARAM_DEFINE_FLOAT (TC_B2_X4, 0.0f) | |
| Barometer offset temperature ^4 polynomial coefficient. More... | |
| PARAM_DEFINE_FLOAT (TC_B2_X3, 0.0f) | |
| Barometer offset temperature ^3 polynomial coefficient. More... | |
| PARAM_DEFINE_FLOAT (TC_B2_X2, 0.0f) | |
| Barometer offset temperature ^2 polynomial coefficient. More... | |
| PARAM_DEFINE_FLOAT (TC_B2_X1, 0.0f) | |
| Barometer offset temperature ^1 polynomial coefficients. More... | |
| PARAM_DEFINE_FLOAT (TC_B2_X0, 0.0f) | |
| Barometer offset temperature ^0 polynomial coefficient. More... | |
| PARAM_DEFINE_FLOAT (TC_B2_SCL, 1.0f) | |
| Barometer scale factor - X axis. More... | |
| PARAM_DEFINE_FLOAT (TC_B2_TREF, 40.0f) | |
| Barometer calibration reference temperature. More... | |
| PARAM_DEFINE_FLOAT (TC_B2_TMIN, 5.0f) | |
| Barometer calibration minimum temperature. More... | |
| PARAM_DEFINE_FLOAT (TC_B2_TMAX, 75.0f) | |
| Barometer calibration maximum temperature. More... | |
Parameters required for temperature compensation of barometers.
Definition in file temp_comp_params_baro.c.
| PARAM_DEFINE_FLOAT | ( | TC_B0_X5 | , |
| 0. | 0f | ||
| ) |
Barometer offset temperature ^5 polynomial coefficient.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B0_X4 | , |
| 0. | 0f | ||
| ) |
Barometer offset temperature ^4 polynomial coefficient.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B0_X3 | , |
| 0. | 0f | ||
| ) |
Barometer offset temperature ^3 polynomial coefficient.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B0_X2 | , |
| 0. | 0f | ||
| ) |
Barometer offset temperature ^2 polynomial coefficient.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B0_X1 | , |
| 0. | 0f | ||
| ) |
Barometer offset temperature ^1 polynomial coefficients.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B0_X0 | , |
| 0. | 0f | ||
| ) |
Barometer offset temperature ^0 polynomial coefficient.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B0_SCL | , |
| 1. | 0f | ||
| ) |
Barometer scale factor - X axis.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B0_TREF | , |
| 40. | 0f | ||
| ) |
Barometer calibration reference temperature.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B0_TMIN | , |
| 5. | 0f | ||
| ) |
Barometer calibration minimum temperature.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B0_TMAX | , |
| 75. | 0f | ||
| ) |
Barometer calibration maximum temperature.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B1_X5 | , |
| 0. | 0f | ||
| ) |
Barometer offset temperature ^5 polynomial coefficient.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B1_X4 | , |
| 0. | 0f | ||
| ) |
Barometer offset temperature ^4 polynomial coefficient.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B1_X3 | , |
| 0. | 0f | ||
| ) |
Barometer offset temperature ^3 polynomial coefficient.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B1_X2 | , |
| 0. | 0f | ||
| ) |
Barometer offset temperature ^2 polynomial coefficient.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B1_X1 | , |
| 0. | 0f | ||
| ) |
Barometer offset temperature ^1 polynomial coefficients.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B1_X0 | , |
| 0. | 0f | ||
| ) |
Barometer offset temperature ^0 polynomial coefficient.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B1_SCL | , |
| 1. | 0f | ||
| ) |
Barometer scale factor - X axis.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B1_TREF | , |
| 40. | 0f | ||
| ) |
Barometer calibration reference temperature.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B1_TMIN | , |
| 5. | 0f | ||
| ) |
Barometer calibration minimum temperature.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B1_TMAX | , |
| 75. | 0f | ||
| ) |
Barometer calibration maximum temperature.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B2_X5 | , |
| 0. | 0f | ||
| ) |
Barometer offset temperature ^5 polynomial coefficient.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B2_X4 | , |
| 0. | 0f | ||
| ) |
Barometer offset temperature ^4 polynomial coefficient.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B2_X3 | , |
| 0. | 0f | ||
| ) |
Barometer offset temperature ^3 polynomial coefficient.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B2_X2 | , |
| 0. | 0f | ||
| ) |
Barometer offset temperature ^2 polynomial coefficient.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B2_X1 | , |
| 0. | 0f | ||
| ) |
Barometer offset temperature ^1 polynomial coefficients.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B2_X0 | , |
| 0. | 0f | ||
| ) |
Barometer offset temperature ^0 polynomial coefficient.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B2_SCL | , |
| 1. | 0f | ||
| ) |
Barometer scale factor - X axis.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B2_TREF | , |
| 40. | 0f | ||
| ) |
Barometer calibration reference temperature.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B2_TMIN | , |
| 5. | 0f | ||
| ) |
Barometer calibration minimum temperature.
Thermal Compensation
| PARAM_DEFINE_FLOAT | ( | TC_B2_TMAX | , |
| 75. | 0f | ||
| ) |
Barometer calibration maximum temperature.
Thermal Compensation
| PARAM_DEFINE_INT32 | ( | TC_B_ENABLE | , |
| 0 | |||
| ) |
Thermal compensation for barometric pressure sensors.
Thermal Compensation 0 1
| PARAM_DEFINE_INT32 | ( | TC_B0_ID | , |
| 0 | |||
| ) |
ID of Barometer that the calibration is for.
Thermal Compensation
| PARAM_DEFINE_INT32 | ( | TC_B1_ID | , |
| 0 | |||
| ) |
ID of Barometer that the calibration is for.
Thermal Compensation
| PARAM_DEFINE_INT32 | ( | TC_B2_ID | , |
| 0 | |||
| ) |
ID of Barometer that the calibration is for.
Thermal Compensation


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new TibberQuery(config)
Constructor
Create an instace of TibberQuery class
Parameters:
| Name | Type | Description |
|---|---|---|
config |
IConfig object |
- Source:
- See:
-
- IConfig
Methods
(async) getConsumption(resolution, lastCount, homeId)
Get energy consumption for one or more homes.
Returns an array of IConsumption
Parameters:
| Name | Type | Description |
|---|---|---|
resolution |
EnergyResolution. Valid values: HOURLY, DAILY, WEEKLY, MONTHLY, ANNUAL | |
lastCount |
Return the last number of records | |
homeId |
Tibber home ID. Optional parameter. Empty parameter will return all registered homes. |
- Source:
Returns:
Array of IConsumption
(async) getCurrentEnergyPrice(homeId)
Get current energy price for selected home.
Parameters:
| Name | Type | Description |
|---|---|---|
homeId |
Tibber home ID |
- Source:
Returns:
IPrice object
(async) getCurrentEnergyPrices()
Get current energy prices from all homes registered to current user
- Source:
Returns:
Array of IPrice
(async) getHome(homeId)
Get selected home with some selected properties, including address and owner.
Parameters:
| Name | Type | Description |
|---|---|---|
homeId |
Tibber home ID |
- Source:
Returns:
IHome object
(async) getHomeComplete(homeId)
Get homes with all properties, including energy price, consumption and production.
Parameters:
| Name | Type | Description |
|---|---|---|
homeId |
Tibber home ID |
- Source:
Returns:
IHome object
(async) getHomes()
Get homes with some selected properties, including address and owner.
- Source:
Returns:
Array of IHome.
(async) getHomesComplete()
Get homes with all properties, including energy price, consumption and production.
- Source:
Returns:
Array of IHome
(async) getTodaysEnergyPrices(homeId)
Get energy prices for today.
Parameters:
| Name | Type | Description |
|---|---|---|
homeId |
Tibber home ID |
- Source:
Returns:
Array of IPrice
(async) getTomorrowsEnergyPrices(homeId)
Get energy prices for tomorrow. These will only be available between 12:00 and 23:59
Parameters:
| Name | Type | Description |
|---|---|---|
homeId |
Tibber home ID |
- Source:
Returns:
Array of IPrice
(async) sendPushNotification(title:, message:, screen:)
Sends a push notification to the current user's tibber app.
Returns a ISendPushNotification Object
Parameters:
| Name | Type | Description |
|---|---|---|
title: |
"The title of your message"; | |
message: |
"The message you want to send"; | |
screen: |
AppScreen Object, example: AppScreen.HOME ; |
- Source:
Returns:
ISendPushNotification Object


Tear gas fired by police as yellow vest protesters mark anniversary
Police in Paris fired tear gas on Saturday to push back yellow vest protesters trying to revive their movement on the first anniversary of the sometimes-violent uprising against policies seen as favouring the rich.
Police deployed in force and detained 24 people around the capital by mid-morning.
Officers dislodged protesters trying to block the bypass around Paris and sprayed repeated volleys of tear gas at groups gathered near Porte de Champerret, in the north-west, and Place d’Italie in the south-east of the city.
Associated Press reporters covering the demonstrations did not see any violence or other action from protesters to provoke the police charge.
The protests were part of actions around the country, notably at traffic circles where the grassroots movement first took root in November 2018 in protest at government plans to raise fuel taxes.
Some protesters in Paris wore the high-visibility vests drivers are required to carry in their cars that gave the movement its name. Other demonstrators wore all black, their faces protected with gas masks.
Dozens of police in riot gear guarded the Arc de Triomphe overlooking the Champs-Elysees avenue, a scene of weekly rioting and police crackdowns at the height of the protests last year.
Corentin Pihel, 28, said he travelled to Paris from Montpellier to mark the movement’s anniversary this weekend.
He joined the yellow vest movement two weeks after the movement began, identifying with its mission as a struggling student at the time.
“In the beginning, I found that the movement made a lot of sense, to mobilise from the bottom for better buying power,” Mr Pihel said.
“But after, it enlarged its communication to become much greater — it’s just people who want to live. And I felt a real solidarity.”
Around the southern city of Marseille, yellow-vested protesters gathered at traffic circles to remind the government of their discontent.
Last year, the scattered protests erupted into a nationwide outpouring of anger at perceived social and economic injustice — and especially at centrist, pro-business President Emmanuel Macron.
Mr Macron backed down on the fuel tax and offered 10 billion euro (£8.5 billion) in measures to address protesters’ concerns.


For the full functionality of the gallery app, please log in to your account, if you don't have a account please create one.


Options for configuring your Voyageone integration.
| Option | Example | Description |
|---|---|---|
| Base URL | https://example.com/api/ | The root URL of your VoyageOne OpenAPI |
| Support Zero Quantity Products | True |
If true, sellers will be permitted to list products that are out of stock (meaning they do not have positive
available buyable quantity). If false, sellers will not be permitted to list out of stock products. |
| Product Content Update Frequency | 6 hours | How often Voyageone will attempt to update product data such as title and description. |
| Quantity and Price Update Frequency | 15 minutes | How often Voyageone will attempt to update each seller’s quantity and price information. |
| Order Import Frequency | 15 minutes | How often Voyageone will attempt to import new seller orders, send shipments, and issue refund and cancellation requests. |
| API Rate Limits | 1000 requests per minute per seller | Restricts how many requests can be made on a seller’s behalf to your API in minutes. |
| Update Batch Size Limits |
500 Products / batch 200 Shipments/ batch |
Restricts the maximum number of elements per batch that Voyageone will send to your API |


Plugins - Not Just For Policies Anymore
Jul 24, 2015 Eric Wittmann api-manager, api-gateway, plugins, development, and mavenNote: This is a redux of our blogpost for apiman 1.2.x. If you're still using apiman 1.1.x, you can refer to the older revision.
As you may know, apiman has long supported custom policies provided by users. If you aren’t familiar with apiman plugins, you can find more about them by clicking here.
As of version 1.1.5.Final, plugins are now even more useful. You can provide custom implementations of various core apiman system components via plugins. This allows users to customize apiman easily, without any changes to the classpath and without rebuilding the core apiman application.
In this blog post I’ll explain how it works.
Review: What is a plugin?
First, here are some good resources you can use to learn more about apiman plugins:
No patience to read those links? That’s OK - I’ll give you a quick breakdown.
An apiman plugin is basically a WAR file with one additional required file. The additional
file is META-INF/apiman/plugin.json
and it contains some meta-data about the plugin. An
example of a plugin.json file (from the JSONP policy plugin):
We chose WAR as the plugin format because it allows all of the file types we need, it is a well-known structure, and it’s easy to create (e.g. via maven).
When contributing a custom apiman component via a plugin, all you need is the plugin.json
file and the java class file(s) that implement the appropriate component interface. Of
course, because a plugin is a WAR, you can also include any library dependencies your
component might need.
What are these components are you talking about?
apiman is made up of a number of components that work together to accomplish the goal of API Management. There are two primary pieces of the apiman story:
- API Manager
- API Gateway
Each of these consists of its own components. For example, the API Manager is made up of the following (not necessarily an exhaustive list):
- Storage Component
- Query Component
- IDM Component
- Metrics Accessor Component (consumes metrics data)
On the other hand, the API Gateway consists of a separate set of components, such as:
- Configuration Registry
- Rate Limiting Component
- Shared State Component
- Metrics Component (produces metrics data)
By default, the apiman quickstart uses default values for all of these, resulting in a stable, working system with the following characteristics:
- Stores API Manager data in a JDBC database
- Records and queries metrics data via Elasticsearch
- Stores Gateway configuration information in Infinispan
- Uses infinispan to share rate limiting state across gateway nodes
There are alternative configurations of apiman that you can use without needing to resort to plugins. For example, we provide Elasticsearch implementations of many of the components mentioned above. So you could easily switch from Infinispan to ES in the Gateway, if you wanted. However, if you wish to provide a custom implementation of something, plugins are now the way to go!
Example Scenario
There is a lot you can do now that we support plugin components. But it’s probably easiest to explain and understand if we take a simple example scenario.
Use mongodb to store Gateway configuration information
If you download the apiman quickstart, the default configuration is to use the built in WildFly 8 infinispan subsystem to store the API Gateway configuration info. This includes all APIs published to the Gateway, and all client apps registered with it as well. Perhaps you would rather that data be stored in mongodb? Since we don’t have a mongodb implementation of the Gateway Registry, you’ll need to implement it yourself and bundle it up into a plugin!
Create a apiman-gateway-mongodb plugin
I won’t go through the entire process of creating an apiman plugin here, since it is
already well documented (and linked above). You’ll need a WAR maven project with a
plugin.json
file in the right place, which might look something like this:
You will also need an implementation of the Gateway’s io.apiman.gateway.engine.IRegistry
interface. Let’s call it MongoDbRegistry.java
:
Obviously you will want to include any mongodb client libraries you need, and then implement the actual functionality of the class. I leave that as an exercise for the reader. Note that most of the Gateway components have asynchronous APIs. If possible you should attempt to use asynchronous techniques when providing implementations.
Switching to your custom implementation in apiman.properties
Now you’ve got a component you want to use, and it’s all nicely wrapped up in a shiny
new plugin. Your next step is to actually use it! Using a custom component is as
simple as referencing it in the apiman.properties
file. You’ll need to remove
this line first:
and then add something like this:
The format of the value of apiman-gateway.registry
is very important - when
using a plugin you must specify the maven information of your plugin so that
apiman can locate and download it. See the apiman documentation for additional
details about how plugins are loaded.
Note that you can also provide configuration parameters to your component. That will obviously be helpful since it will probably need connection details. So really your configuration might look something like this:
These configuration options will be passed to your component in its constructor if
your class has a Map<String,String>
constructor.
Conclusion
This is a powerful new feature for extending and customizing apiman to better suit your needs. Of course we will want to continue offering the most popular component implementations as a core part of apiman. However there will always be many more options than we can easily implement and support. For this reason we wanted to provide an easy way for users (and the apiman community at large) to contribute.
/post


--- layout: default title: "_pi_'s blog" ---
Welcome to my blog. I might put some text here for you to pass through your eyeballs in the future. I'm not the best writer, but I'll try to make it worth your brain-strain to parse my ramblings.
Might contain trace elements of a lot of rants and vents of frustration, written by none other than me, the great _pi_, ruler of the underworld of cursed technology, broken IT and Austrian cuisine.
Some stuff I write here might be exaggerated for comedic^Wdramatic effect. The above is 100% true though. Trust me, I have a degree in Celsius.


Rising Sea Levels
At the coordinates you picked, at a longitude of {{ longitude }}, a latitude of {{ latitude }}, and an elevation of
{{ elevation }} feet, there is a {{ chance }} chance that rising
sea levels will affect this spot.
The threat of rising sea levels is expected to affect hundreds of millions of people by the year 2100.
If you want to learn more, check out our resources page with a few links about this topic.


A set of functions which help you to unit test code that uses firebase.database
Members
(static) memoizeSnapshot
A helper function when setting up default fake behavior for a suite of tests. It takes boiler plate out of your test code.
(static) reference
A factory function that creates a fake database.reference object.
(static) resolveSnapshot
Return a promise that will resolve a snapshot from the value and key given. This is useful in modeling once()
(static) snapshot
A factory function that creates a fake DataSnapshot object.


Capital World subsidiary pulls out of Malaysian land deal
by Annabeth LeowCATALIST-LISTED property developer Capital World, which recently had its ability to continue as a going concern flagged by its auditor, saw a subsidiary scrap its plans to buy a Malaysian company that held joint development rights for some land in Johor.
Wholly-owned Capital World subsidiary Baiduri Megaria on Thursday revoked the agreement to buy Kekal Efektif, the board disclosed in a bourse filing late that night.
Capital World said that a condition precedent has not been met: Malaysian statutory board Yayasan Pelajaran Johor, which inked a joint development agreement with Kekal in 2016, has not gotten the regulatory approval to degazette the 207.5 acres of land to “Non-Malay Reserve Land” by the deadline.
There is no clarity on when it can do so and “the property demand at the project area has shown signs of weakening”, Capital World said, adding that the revocation of the sale agreement will let it reallocate resources to other property projects, and recover the 1.2 million ringgit (S$394,985) deposit.
The revocation is not expected to have a material financial impact on the group’s consolidated net tangible assets and earnings per share for the year to June 30, 2020, the board said.
Stay updated with
BT newsletters
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Capital World shed 0.2 Singapore cent, or 16.67 per cent, to S$0.01, before the announcement.


OpenPayU Ruby
The OpenPayU Ruby library provides integration access to the PayU Gateway API ver. 2.
Installation
Add this line to your application's Gemfile:
gem 'openpayu'
And then execute:
$ bundle
Or install it yourself as:
$ gem install openpayu
Configure Gem
To configure OpenPayU environment add a file to config/initializers/openpayu.rb containing:
OpenPayU::Configuration.configure do |config|
config.merchant_pos_id = '145227'
config.signature_key = '13a980d4f851f3d9a1cfc792fb1f5e50'
config.algorithm = 'MD5' # MD5, SHA-1, SHA-256
config.service_domain = 'payu.com'
config.protocol = 'https'
config.env = 'secure'
config.order_url = 'http://localhost/order'
config.notify_url = 'http://localhost/notify'
config.continue_url = 'http://localhost/success'
end
Or by providing a path to YAML file
OpenPayU::Configuration.configure File.join(Rails.root, 'config/openpayu.yml')
Structure of YAML file:
development:
merchant_pos_id: '145227'
signature_key: 13a980d4f851f3d9a1cfc792fb1f5e50
algorithm: MD5 # MD5, SHA-1, SHA-256
service_domain: payu.com
protocol: https
env: secure
order_url: http://localhost/order
notify_url: http://localhost/notify
continue_url: http://localhost/success
production:
merchant_pos_id: '145227'
signature_key: 13a980d4f851f3d9a1cfc792fb1f5e50
algorithm: MD5 # MD5, SHA-1, SHA-256
service_domain: payu.com
protocol: https
env: secure
order_url: http://localhost/order
notify_url: http://localhost/notify
continue_url: http://localhost/success
Usage
Creating Transparent order
For more information about order please refer to: developers.payu.com/pl/restapi.html#payusdk_creating_new_order_api . To create an order you must provide a Hash with order:
order = {
merchant_pos_id: "145227",
customer_ip: "<IP_ADDRESS>", # You can user request.remote_ip in your controller
ext_order_id: 1342, #Order id in your system
order_url: "http://localhost/",
description: "New order",
currency_code: "PLN",
total_amount: 10000,
notify_url: "http://localhost/",
continue_url: "http://localhost/",
buyer: {
email<EMAIL_ADDRESS>phone: '123123123',
first_name: 'Jan',
last_name: 'Kowalski',
language: 'pl_PL',
delivery: {
street: 'street',
postal_code: 'postal_code',
city: 'city',
country_code: 'PL'
}
},
products: [
{
name: 'Mouse',
unit_price: 10000,
quantity: 1
}
],
shipping_method: {
country: 'PL',
price: 'price',
name: 'shipping name'
}
}
When you have ready order Hash you can create new order:
@response = OpenPayU::Order.create(order)
If request succeed to create it will return "COMPLETE" as a status_code. There might be also a redirect to page with confirmation. There are three redirect types:
-
WARNING_CONTINUE_REDIRECT
-
WARNING_CONTINUE_CVV
-
WARNING_CONTINUE_3DS
case @response.status["status_code"]
when 'COMPLETE'
# order has been created
when /WARNING_CONTINUE_/
#need to redirec user to a provided URL
redirect_to @response.redirect_uri
else
#in other cases something went wrong
logger.info "Unable to create order.
Status<EMAIL_ADDRESS>Response: #{@response}"
end
Creating Hosted order
If you pass the same Hash of order as above to hosted_order_form you will get a String containgin a form to embed in your view
#in your controller
@order_form_data = OpenPayU.hosted_order_form(order)
# in your view
<%= @order_form_data.html_safe %>
Retrieving order from OpenPayU
You can retrieve order by its PayU order_id
@response = OpenPayU::Order.retrieve("Z963D5JQR2230925GUEST000P01")
Cancelling order
You can cancel order by its PayU order_id
@response = OpenPayU::Order.cancel("Z963D5JQR2230925GUEST000P01")
Updating order status
You can update order status to accept order when Autoreceive in POS is turned off
status_update = {
order_id: "Z963D5JQR2230925GUEST000P01",
order_status: 'COMPLETED'
}
@response = OpenPayU::Order.status_update(status_update)
Handling notifications from PayU
PayU sends requests to your application when order status changes
@response = OpenPayU::Order.consume_notification(request) #request object from controller
@response.order_status #NEW PENDING CANCELLED REJECTED COMPLETED WAITING_FOR_CONFIRMATION
#you should response to PayU with special structure (OrderNotifyResponse)
render json<EMAIL_ADDRESS>Refund money
@refund = OpenPayU::Refund.create({
order_id: "Z963D5JQR2230925GUEST000P01", #required
description: "Money refund", #required
ext_refund_id: 21312, #Refund Id in your syste, optional
amount: 1000, #If not provided, returns whole transaction, optional
commission_amount: 123, #optional
currency_code: "PLN" #optional
})
Changelog
0.1.2
-
Gem adjusted to OpenPayU REST API v 2.0
-
Communication with OpenPayU only in JSON format, XML is no longer supported
Contributing
-
Fork it
-
Create your feature branch (
git checkout -b my-new-feature
) -
Commit your changes (
git commit -am 'Add some feature'
) -
Push to the branch (
git push origin my-new-feature
) -
Create new Pull Request


--- layout: post title: iPhone 4 Unboxing Photos date: 2010-06-23 14:00:40.000000000 -07:00 type: post published: true status: publish categories: [] tags: [] meta: {} author: ---


| Version | CPU | Interface | Version | Comment |
|---|---|---|---|---|
| Packman packages. These packages are better included in your openSUSE distribution. It is preferable to use them. |
Packman website | Warning: they are currently out of date. | ||
| 13.1 | i586 | openSUSE 13.1, i586 | ||
| GUI | v0.7.66 | requires libmediainfo0 | ||
| CLI | v0.7.66 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.66 (devel) | requires libzen0 | ||
| libzen0 | v0.4.29 (devel) | |||
| x86_64 | openSUSE 13.1, x86_64 | |||
| GUI | v0.7.66 | requires libmediainfo0 | ||
| CLI | v0.7.66 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.66 (devel) | requires libzen0 | ||
| libzen0 | v0.4.29 (devel) | |||
| 12.3 | i586 | openSUSE 12.3, i586 | ||
| GUI | v0.7.66 | requires libmediainfo0 | ||
| CLI | v0.7.66 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.66 (devel) | requires libzen0 | ||
| libzen0 | v0.4.29 (devel) | |||
| x86_64 | openSUSE 12.3, x86_64 | |||
| GUI | v0.7.66 | requires libmediainfo0 | ||
| CLI | v0.7.66 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.66 (devel) | requires libzen0 | ||
| libzen0 | v0.4.29 (devel) | |||
| 12.2 | i586 | openSUSE 12.2, i586 | ||
| GUI | v0.7.66 | requires libmediainfo0 | ||
| CLI | v0.7.66 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.66 (devel) | requires libzen0 | ||
| libzen0 | v0.4.29 (devel) | |||
| x86_64 | openSUSE 12.2, x86_64 | |||
| GUI | v0.7.66 | requires libmediainfo0 | ||
| CLI | v0.7.66 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.66 (devel) | requires libzen0 | ||
| libzen0 | v0.4.29 (devel) | |||
| 12.1 | i586 | openSUSE 12.1, i586 | ||
| GUI | v0.7.66 | requires libmediainfo0 | ||
| CLI | v0.7.66 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.66 (devel) | requires libzen0 | ||
| libzen0 | v0.4.29 (devel) | |||
| x86_64 | openSUSE 12.1, x86_64 | |||
| GUI | v0.7.66 | requires libmediainfo0 | ||
| CLI | v0.7.66 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.66 (devel) | requires libzen0 | ||
| libzen0 | v0.4.29 (devel) | |||
| 11.4 | i586 | openSUSE 11.4, i586 | ||
| GUI | v0.7.66 | requires libmediainfo0 | ||
| CLI | v0.7.66 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.66 (devel) | requires libzen0 | ||
| libzen0 | v0.4.29 (devel) | |||
| x86_64 | openSUSE 11.4, x86_64 | |||
| GUI | v0.7.66 | requires libmediainfo0 | ||
| CLI | v0.7.66 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.66 (devel) | requires libzen0 | ||
| libzen0 | v0.4.29 (devel) | |||
| 11.3 | i586 | openSUSE 11.3, i586 | ||
| GUI | v0.7.53 | requires libmediainfo0 | ||
| CLI | v0.7.53 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.53 (devel) | requires libzen0 | ||
| libzen0 | v0.4.24 (devel) | |||
| x86_64 | openSUSE 11.3, x86_64 | |||
| GUI | v0.7.53 | requires libmediainfo0 | ||
| CLI | v0.7.53 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.53 (devel) | requires libzen0 | ||
| libzen0 | v0.4.24 (devel) | |||
| 11.2 | i586 | openSUSE 11.2, i586 | ||
| GUI | v0.7.44 | requires libmediainfo0 | ||
| CLI | v0.7.44 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.44 (devel) | requires libzen0 | ||
| libzen0 | v0.4.24 (devel) | |||
| x86_64 | openSUSE 11.2, x86_64 | |||
| GUI | v0.7.44 | requires libmediainfo0 | ||
| CLI | v0.7.44 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.44 (devel) | requires libzen0 | ||
| libzen0 | v0.4.24 (devel) | |||
| 11.1 | i586 | openSUSE 11.1, i586 | ||
| GUI | v0.7.41 | requires libmediainfo0 | ||
| CLI | v0.7.41 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.41 (devel) | requires libzen0 | ||
| libzen0 | v0.4.24 (devel) | |||
| x86_64 | openSUSE 11.1, x86_64 | |||
| GUI | v0.7.41 | requires libmediainfo0 | ||
| CLI | v0.7.41 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.41 (devel) | requires libzen0 | ||
| libzen0 | v0.4.24 (devel) | |||
| 11.0 | i586 | openSUSE 11.0, i586 | ||
| GUI | v0.7.28 | requires libmediainfo0 | ||
| CLI | v0.7.28 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.28 (devel) | requires libzen0 | ||
| libzen0 | v0.4.14 (devel) | |||
| x86_64 | openSUSE 11.0, x86_64 | |||
| GUI | v0.7.28 | requires libmediainfo0 | ||
| CLI | v0.7.28 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.28 (devel) | requires libzen0 | ||
| libzen0 | v0.4.14 (devel) | |||
| 10.3 | i586 | openSUSE 10.3, i586 | ||
| GUI | v0.7.22 | requires libmediainfo0 | ||
| CLI | v0.7.22 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.22 (devel) | requires libzen0 | ||
| libzen0 | v0.4.7 (devel) | |||
| x86_64 | openSUSE 10.3, x86_64 | |||
| GUI | v0.7.22 | requires libmediainfo0 | ||
| CLI | v0.7.22 | requires libmediainfo0 | ||
| libmediainfo0 | v0.7.22 (devel) | requires libzen0 | ||
| libzen0 | v0.4.7 (devel) |


Koch Snowflakes
A Koch Snowflake going through 8 iterations from 3 to 12,288 sides
A Koch Snowflake is a fractal that is generated by the recursive subdivision of line segments according to a simple rule. For the Snowflake seen above, the initial state is three line segments that form an equilateral triangle.
The Koch Snowflake has the fascinating property that while it bounds a finite area, its perimeter tends toward infinity. Let’s code this infinite perimeter in finite time.
Let’s define some simple objects.
We need to work with Segments. A line segment has two Points.
var Point = function (x, y) {
this.x = x;
this.y = y;
};
Points can be added: sum the X and Y component of both points
Point.prototype.add = function (B) {
let newX = this.x + B.x;
let newY = this.y + B.y;
return new Point(newX, newY);
};
Points can be multiplied by a scalar: multiply the X and Y component by the scalar value
Point.prototype.scalarMultiply = function (B) {
let newX = this.x * B;
let newY = this.y * B;
return new Point(newX, newY);
};
A segment holds two points.
var Segment = function (args = {}) {
const { A, B } = args;
this.A = new Point(A[0], A[1]);
this.B = new Point(B[0], B[1]);
};
Segment.prototype.split = function () {
/* magical split function, to be defined */
};
Segment.split()
will turn a segment into four line segments per the Koch method.
We need to do some math.
thanks to excellent StackOverflow answer
Segment.split()
must calculate the value of points P, Q, and R given points A and B.
We perform the following operation to create four new line segments from segment AB:
- Convert AB into three equal parts of
length
(red lines are the two split points) - Draw an equilateral triangle with base points
length/3
(P) and2*length/3
(R) - Remove the base of the triangle, segment PR.
To handle Step 3, we will simply not calculate the base of the triangle at all. Now we just need to calculate the X and Y coordinates of points A, B, P, Q, and R.
A and B
A and B are trivial.
A: [this.A.x, this.A.y]
B: [this.B.x, this.B.y]
P and R
P and R are also quite simple. We create the helper point U
which has coordinates
[this.B.x - this.A.x, this.B.y - this.A.y]
U helps us translate the Y component of P and R when AB is not horizontal.
We can then calculate points P and R with the scalarMultiply
method that we gave our points. We can calculate these points relative to A. Points P and R correspond to the two red lines in the diagram, or the 1/3 and 2/3 split of the segment AB.
P: let P = this.A.add(U.scalarMultiply(1 / 3));
R: let R = this.A.add(U.scalarMultiply(2 / 3));
If the line AB is horizontal, A.y==B.y
, so the Y component of U
will be zero. However, if the line is at an angle relative to the X-axis, the scalar multiplication adjusts the Y-component of P and R by a factor of (1/3) and (2/3) times the “difference in Y” between A and B.
The dreaded Point Q
Q is the trickiest one. Just repeat: move to the midpoint of AB and distribute the height, proportional to AB’s orientation. That’s all there is to it.
Okay, sorry…that was a mouthful.
We know the altitude of an equilateral triangle is side*sqrt(3)/2
.
Since our equilateral triangle consists of a third of the side length, the height of our triangle becomes (side/3)*sqrt(3)/2
or side*sqrt(3)/6
.
Q will always be altitude side*sqrt(3)/6
away from segment AB. The question is only: how do we calculate this point when AB is not horizontal?
How much of the altitude is distributed to the X and Y component of Q, given a rotation of AB?
Here we make use of the helper point V
, which has coordinates
[this.A.y - this.B.y, this.B.x - this.A.x]
Point V is the result of rotating Point U 90 degrees counterclockwise relative to the origin. You can rotate a point (x, y) in this way by transforming it into (-y, x).
Once we have Point V, we have only to use it.
V helps us translate the X component of Q when AB is not horizontal.
let Q = this.A.add(
U.scalarMultiply(1 / 2).add(V.scalarMultiply(Math.sqrt(3) / 6))
);
First, we translate Point A to the midpoint of AB by multiplying by U*(1/2)
.
Then we need to distribute the height to the X and Y components based on the orientation of AB.
Have a look at this diagram and work through the following three cases.
-
Consider: if AB is horizontal,
A.y-B.y==0
, so the x-component of V will be zero. We distribute all the height to the Y component of Q. -
Consider: if AB is rotated 45 degrees CCW relative to the origin,
A.y-B.y==(-1)*s/sqrt(2)
andB.x-A.x==s/sqrt(2)
. We distribute half the height to the X component of Q (subtracting from Q) and half the height to the Y component of Q. -
Consider: if AB is rotated 90 degrees CCW relative to the origin,
A.y-B.y==(-1*)sideLength
.B.x-A.x==0
. We distribute all the height to the X component of Q (subtracting from Q) and none of the height to the Y component of Q (Q’s Y stays at the midpoint of AB).
Note how since we handled these cases for the first and second quadrant, where A.y<B.y
, we are also covered if the rotation is CW about the origin into the third or fourth quadrant: in these cases, A.y>B.y
, so we ADD to the X component of Q instead of subtract.
We finished Segment.split()!
We already did all the tricky maths. Now we just have to fill in the points, based our calculations above. Coding Segment.split is trivial, since we planned what we were going to do before we tried to do it.
Segment.prototype.split = function () {
let U = new Point(this.B.x - this.A.x, this.B.y - this.A.y);
let V = new Point(this.A.y - this.B.y, this.B.x - this.A.x);
let P = this.A.add(U.scalarMultiply(1 / 3));
let Q = this.A.add(
U.scalarMultiply(1 / 2).add(V.scalarMultiply(Math.sqrt(3) / 6))
);
let R = this.A.add(U.scalarMultiply(2 / 3));
return [
new Segment({
// AP
A: [this.A.x, this.A.y],
B: [P.x, P.y],
}),
new Segment({
// PQ
A: [P.x, P.y],
B: [Q.x, Q.y],
}),
new Segment({
// QR
A: [Q.x, Q.y],
B: [R.x, R.y],
}),
new Segment({
// RB
A: [R.x, R.y],
B: [this.B.x, this.B.y],
}),
];
};
Using what we already made
We can use the same code that we wrote for the Sierpinski Triangle tutorial to generate and play through the phases of evolution of the Koch Snowflake.
We’ll define our three starting line segments as the three sides of an equilateral triangle. Our Segment
object does all the heavy lifting of figuring out how to split itself up given its orientation. We then simply iterate over the number of levels to generate our lovely snowflake.
const triWidth = 400;
const triHeight = (Math.sqrt(3) * triWidth) / 2;
let startingLine = [
new Segment({ A: [0, 0], B: [triWidth / 2, triHeight] }),
new Segment({ A: [triWidth / 2, triHeight], B: [triWidth, 0] }),
new Segment({ A: [triWidth, 0], B: [0, 0] }),
];
const levels = 6;
for (var i = 0; i <= levels; i++) {
startingLine = startingLine
.map((t) => t.split())
.reduce((arr, c) => arr.concat(c), []);
}
Those lines look a little jagged
Ah, what an astute observer! What’s happening here is twofold:
- Drawing lines on HTML canvas that are incredibly close together and at strange decimal offsets
- Error propagation due to cumulative rounding inaccuracies of floating-point arithmetic
We’ve already seen #1 before in our previous HTML5 canvas tutorials
. That’s why we call ctx.translate(0.5, 0.5)
for smooth lines (so we draw “on” a pixel instead of “between” pixels).
For #2, just try this.
console.log(0.1 + 0.1 == 0.2); // true
console.log(0.1 + 0.2 == 0.3); // false... what the?!
console.log(0.1 + 0.1); // 0.2 -- okay, looks good
console.log(0.1 + 0.2); // 0.30000000000000004 -- facepalm
If you’d like to know why, check out how computers store decimal values using binary fractions and this StackOverflow post about Javascript and the IEEE-754 floating point number standard, specifically.
Believe it or not, even 0.1+0.1 generates rounding error. You just don’t see it in the previous example, because JavaScript’s internal number format has rules for rounding the result of floating point arithmetic.
Whenever the error becomes greater than the least significant digit of the result, you get incorrect answers. See this example:
let start = 0;
for (var i = 0; i < 100; i++) {
start += 0.1;
}
console.log(10 - start); // cumulative error: 1.9539925233402755e-14
console.log(start); // we expect 10, we get: 9.99999999999998
Feels a little bit like Office Space , huh?


The universe of the Game of Life is a two-dimensional orthogonal grid of square cells, each of which is in one of two possible states, alive or dead. Every cell interacts with its eight neighbors, the immediately adjacent cells in orthogonal and diagonal direction. Cells on the border have less than eight neighbors. At each generation, the following transitions occur:
1. Any live cell with fewer than two live neighbors dies, as if by loneliness.
2. Any live cell with more than three live neighbors dies, as if by overcrowding.
3. Any live cell with two or three live neighbors lives, unchanged, to the next generation.
4. Any dead cell with exactly three live neighbors comes to life.
Your task is to write a program to simulate the Game of Life for a 20x20 world. The 20x20 world needs to be initialized by reading in which cells are occupied from the user. Your program will generate and display the next generation iteratively based on the set of rules described above. The number of generation for the simulation is also input by the user.
result:


+92<PHONE_NUMBER>
for best experieance call us now
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.
Some quick example text to build on the card title and make up the bulk of the card's content.
Some quick example text to build on the card title and make up the bulk of the card's content.
Some quick example text to build on the card title and make up the bulk of the card's content.
for best experieance call us now
Join Us Now


--- title: Customizing the progress bar in InstantClick ---
The progress bar is a fake progress bar, just there to give your users a sense that something is happening.
In the future, it should be possible to make the bar show real progress (by looking at the server’s Content-Length
header).
The bar is displayed even if the page has been loaded instantly, in the future this will change. Discussion on GitHub.
When the visitor zooms on the page or rotates his device, the bar’s size and position automatically adjust, so it works even if your site isn’t optimized for mobile.
By default, the progress bar’s color is #29d
, you can change that with CSS:
| 1 2 3 |
|
You may also make the bar go away:
| 1 2 3 |
|
The way to make the bar go away isn’t optimal. In a later version of InstantClick it will be possible not to have it run by passing an argument to InstantClick.init
.
include('includes/documentation_navigation.php') ?>


ROS Navigation¶
Introduction¶
In this tutorial you will learn how to program a mobile robot using ROS to navigate from point A to point B autonomously while avoiding obstacles.
You will learn by doing. Specifically, in each of the three main topics in this tutorial, you will follow the following steps.
- Running a complete example. First, for each topic, you will run a set of available ROS programs to perform the tasks discussed in this tutorial in order to get familiar with the tools.
- Analyze examples. Next, we will dig deeper into the examples and understand how it works.
- Do exercises. To make sure that you understand and enforce the concepts you learned, a set of exercises are provided for you to solve. Solutions for those exercises are available. However,
Important
You will only learn the concepts mentioned here by practicing. Remember to practice, practice, and practice ….
In this tutorial, you will work with a simulated robot called TurtleBot
in the Gazebo simulator.
Prerequisites¶
This tutorial assumes the following.
- You are familiar with ROS basics e.g. topics, services, actions, how to write ROS nodes in Python, and ROS command line tools
- ROS Kinetic (Desktop-Full install) is installed on Ubuntu 16.04 LTS http://wiki.ros.org/kinetic/Installation/Ubuntu
- Gazebo 7. Comes by default with ROS Kinetic
- A good PC. Recommended i5 with minimum of 8GB RAM
- Basic programing in Python
Topics Covered¶
For a robot to navigate autonomously it needs the following.
- A map of the world or the environment of interest. You will learn how to create a map using laser scans and 2D SLAM ROS programs that are already available. You will also know how use a map that is already available. The ROS package that will be used for mapping is called
gmapping
- Localization. A robot needs to know where it is inside the map in order to know how to go to a goal location. You will learn how to use a localization algorithm already implemented in ROS to help the robot estimate its location in a given map based on 2D laser scans. The ROS package that will be used for localization is called AMCL, Adaptive Monte Carlo Localization.
- Path planing. This is the process of generating a sequence of points (path) between a start point and a goal point.
- Path following. This is the process of following the path that is planned while avoiding obstacles. The ROS package that will be used here for navigation is called move_base
In all the tutorials, you will be using Rviz
which is a very powerful ROS tool for visualizing the status of your robot, sensor information, map building, navigation, and debugging.
Environment Setup¶
During this tutorial, you will work with a simulated robot called TurtleBot, to apply the concepts of navigation using ROS. The following image is a picture of the robot you will work with. It is a differential drive robot, that has a Kinect sensor for environmental mapping, wheel encoders for pose estimation.
Install TurtleBot packages¶
sudo apt-get install ros-kinetic-turtlebot ros-kinetic-turtlebot-apps ros-kinetic-turtlebot-interactions ros-kinetic-turtlebot-simulator ros-kinetic-turtlebot-gazebo -y
After installation is done, check that the simulation works in Gazebo. Execute the following commands in a shell terminal.
roslaunch turtlebot_gazebo turtlebot_world.launch
Attention
It might take long time if you are opening the previous Gazebo world for the first time. Just be patient.
You should get something similar to the following.
Tele-operating the Robot¶
You will need to move the robot around somehow in order to build a map of the world in the coming sections. You can move it using a keyboard or a joystick.
turtlebot_teleop
package provides nodes and launch file to move the robot by either a keyboard or a joystick. There is one launch file for keyboard teleoperation and three launch files for three different joysticks. To navigate to the launch file folder, execute the following.
roscd turtlebot_teleop/launch
To move the robot using a keyboard, execute the corresponding launch file in a separate terminal, after you launch the TurtleBot’s world.
roslaunch turtlebot_teleop keyboard_teleop.launch
Use the keys as mentioned on the screen to move the robot.
To move the robot using a joystick (we will assume Logitech F710 joystick), execute the following.
roslaunch turtlebot_teleop logitech.launch
Hint
You you will need to press certain button combination in order to control the robot with the joystick. Read the instruction in the logitech.launch
file.
Important
Make sure that your joystick is given the required privileges. Use sudo chmod a+rw /dev/input/jsX
(X
is the device number) to give the required privileges to your joystick.
Rviz¶
Rviz (ROS visualization) is a 3D visualizer for displaying sensor data and state information from ROS.
We will be using Rviz all the way in this tutorial. Now, let’s see how we can show simple things in Rviz.
Running Rviz. Make sure that you launched a turtlebot world. Next, in a separate terminal, run rviz using the following command.
rosrun rviz rviz
Adding displays. Next, we will need to add the information that we would like to visualize. This is called Displays. On the left side of Rviz, there is a column called Displays. The first thing we need to adjust is the Fixed frame field. Choose the odom
frame. This is the frame that is created at the initial point of the robot when you launched your turtlebot world, then it becomes fixed for the rest of the simulation. It’s called local fixed frame.
Adding Robot Model. To show the robot 3D model, we will need to add a display for that. Click on the Add button in the lower left corner of the Displays column. Then, choose RobotModel. You should see the robot model in the middle screen.
Adding a display for laser scans. To show what the laser scanner detects on the robots, you can add a LaserScan
display. After adding the display, you will need to specify the topic that has the laser scans reading. In this case it is called /scan
See following snapshots to know what to expect your rviz configs to be like.
Now, you have a basic idea on how to use Rviz to visualize your robots states. Later, we will also use it to visualize the map we built or while we are building it, paths we want to navigate, and how to use it to set goal waypoints.
Hint
If you close Rviz, you will loose the displays and the configs you made. You can save the current configs you did in order to load it quickly next time you launch Rviz. Just use the File menu and choose save config as.
Now it’s time to build a map!
Mapping¶
The first step we need to do in order to be able to perform autonomous navigation is to build a map.
In this tutorial we will learn how to create a 2D map with a ROS package called gmapping
. Here is the definition of the package according to the official WiKi (http://wiki.ros.org/gmapping)
> The gmapping package provides laser-based SLAM (Simultaneous Localization and Mapping), as a ROS node called slam_gmapping
. Using slam_gmapping
, you can create a 2-D occupancy grid map (like a building floorplan) from laser and pose data collected by a mobile robot.
Although there are other packages that allow to build 3D maps, but we will only stick to 2D mapping in this tutorial.
If you are curious, there is a nice package called octomap
for 3D mapping (http://wiki.ros.org/octomap).
So basically, we will be performing 2D SLAM in order to construct a 2D map of a certain environment. To do that, as mentioned, we will use gmapping
package. This package takes laser scans and robot odometry and outputs a map expressed as occupancy grid. Wait! What is occupancy grid? don’t worry, we will get to that soon.
To start, we will see how to use mapping through an example.
Building 2D map using gmapping
package¶
First let’s bring up our Gazebo world.
roslaunch turtlebot_gazebo turtlebot_world.launch
The playground world with a TurtleBot2 looks like this:
Hint
You can launch another world using command
roslaunch turtlebot_gazebo turtlebot_world.launch world_file:=worlds/willowgarage.world
To start building a map, let’s run the gmapping
node.
roslaunch turtlebot_gazebo gmapping_demo.launch
Next, run Rviz in order to visualize the map you build in real-time.
rosrun rviz rviz
Add the following displays:
RobotModel
LaserScan
Map
In order to visualize the robot, laser scans, and the map.
Use your favorite teleoperation tool to drive the TurtleBot around the world, until you get satisfied with your map. The following capture shows the mapping process after turning 360 degrees.
For example, to use the keyboard to drive the robot, launch the corresponding launch file as you did before in the Tele-operating the Robot section.
roslaunch turtlebot_teleop keyboard_teleop.launch
Start driving the robot using keyboard keys and observe how the map is updated in Rviz.
Once you get satisfied about your map, you can save it for later use. To save the map execute the following command inside the folder you would like to save the map inside.
rosrun map_server map_saver -f <your map name>
Your saved map is represented by two files.
- YAML file which contains descriptions about your map setup
- grayscale image that represents your occupancy grid map, which actually can be edited by an image editor
OK! What has just happened ?! Let’s look closely into the gmapping_demo.launch
file and see what it does.
Analyzing gmapping_demo.launch
¶
Localization¶
Path Planning/Following¶
Mini Project¶
Conclusion¶
References¶
Contributors¶
Main contributor is Mohamed Abdelkader.


spThin is a set of functions that can be used to spatially thin species occurrence data. The resulting thinned data can be used in ecological modeling, such as ecological niche modeling.
| Version: | 0.1.0 |
| Depends: | spam, grid, fields, knitr |
| Published: | 2014-11-17 |
| Author: | Matthew E. Aiello-Lammens, Robert A. Boria, Aleksandar Radosavljevic, Bruno Vilela, and Robert P. Anderson |
| Maintainer: | Matthew E. Aiello-Lammens <matt.lammens at gmail.com> |
| License: | GPL-3 |
| NeedsCompilation: | no |
| CRAN checks: | spThin results |
| Reference manual: | spThin.pdf |
| Vignettes: |
spThin example |
| Package source: | spThin_0.1.0.tar.gz |
| Windows binaries: | r-devel: spThin_0.1.0.zip, r-release: spThin_0.1.0.zip, r-oldrel: spThin_0.1.0.zip |
| OS X binaries: | r-release: spThin_0.1.0.tgz, r-oldrel: spThin_0.1.0.tgz |
| Reverse imports: | SSDM, wallace |
Please use the canonical form https://CRAN.R-project.org/package=spThin to link to this page.


EC signature converter P1363 to DER encoding
Important note: this program is doing what it promises but the programming itself is of very poor quality and for demonstration purposes only. Never ever use this program as source for your own programs because there are a lot of conversions to get it run.
Get more information about this program on
my webpage Elliptic key string signature conversion between DER and IEEE P1363 encoding
Enter a signature in P1363-format and Base64 encoding:
Instructions:
1.: insert your signature in IEEE-P1363 format and Base64 encoding and press the "convert signature" button
2.: receive the signature in DER format and Base64 encoding
signature (will be in DER format and Base64 encoding):


-
getVar(varNo) → {*}
-
Get the value of a variable in this stack frame.
Parameters:
| Name |
Type |
Description |
varNo |
number
|
the index of the variable's location. |
- Source:
Returns:
The value obtained from the specified variable index.
-
Type
-
*
-
peek() → {*}
-
Return the top value of the stack without modifying the frame's state.
- Source:
Returns:
The value retrieved from the top of the stack.
-
Type
-
*
-
pop() → {*}
-
Pop off the top value from the stack, and return it.
- Source:
Returns:
The value retrieved from the top of the stack.
-
Type
-
*
-
-
Push a new value to the top of the stack.
Parameters:
| Name |
Type |
Description |
value |
*
|
the value to place onto the top of the stack. |
- Source:
Returns:
Returns self to allow for some degree of method chaining.
-
Type
-
MVM.StackFrame
-
-
Set a variable in this stack frame to a given value.
Parameters:
| Name |
Type |
Description |
varNo |
number
|
the index of the variable's location. |
value |
*
|
the value to place into the variable store. |
- Source:
Returns:
Returns self to allow for some degree of method chaining.
-
Type
-
MVM.StackFrame


To survive, you need water and food. You must also have and apply high personal hygiene standards.
WATER
Your body loses water through normal body processes (sweating, urinating, and defecating). During average daily exertion when the atmospheric temperature is 20 degrees Celsius (C) (68 degrees Fahrenheit [F]), the average adult loses and therefore requires 2 to 3 liters of water daily. Other factors, such as heat exposure, cold exposure, intense activity, high altitude, burns, or illness, can cause your body to lose more water. You must replace this water.
Dehydration results from inadequate replacement of lost body fluids. It decreases your efficiency and, if you are injured, it increases your susceptibility to severe shock. Consider the following results of body fluid loss:
A 5-percent loss results in thirst, irritability, nausea, and weakness
A 10-percent loss results in dizziness, headache, inability to walk, and a tingling sensation in the limbs.
A 15-percent loss results in dim vision, painful urination, swollen tongue, deafness, and a numb feeling in the skin.
A loss greater than 15 percent may result in death.
The most common signs and symptoms of dehydration are—
Dark urine with a very strong odor.
Low urine output.
Dark, sunken eyes.
Fatigue.
Emotional instability.
Loss of skin elasticity.
Delayed capillary refill in fingernail beds.
Trench line down center of tongue.
Thirst. (Last on the list because you are already 2-percent dehydrated by the time you crave fluids.)
You should replace the water as you lose it. Trying to make up a deficit is difficult in a survival situation, and thirst is not a sign of how much water you need.
Most people cannot comfortably drink more than 1 liter of water at a time. So, even when not thirsty, drink small amounts of water at regular intervals each hour to prevent dehydration.
If you are under physical and mental stress or subject to severe conditions, increase your water intake. Drink enough liquids to maintain a urine output of at least 0.5 liters every 24 hours.
In any situation where food intake is low, drink 6 to 8 liters of water per day. In an extreme climate, especially an arid one, the average person can lose 2.5 to 3.5 liters of water per hour. In this type of climate, you should drink 8 to 12 ounces of water every 30 minutes. It is better to regulate water loss through work or rest cycles because overhydration can occur if water intake exceed 1 1/2 quarts per hour. Overhydration can cause low serum sodium levels resulting in cerebral and pulmonary edema, which can lead to death.
With the loss of water there is also a loss of electrolytes (body salts). The average diet can usually keep up with these losses but in an extreme situation or illness, additional sources need to be provided. You should maintain an intake of carbohydrates and other necessary electrolytes.
Of all the physical problems encountered in a survival situation, the loss of water is the most preventable. The following are basic guidelines for the prevention of dehydration:
Always drink water when eating. Water is used and consumed as a part of the digestion process and can lead to dehydration.
Acclimatize. The body performs more efficiently in extreme conditions when acclimatized.
Conserve sweat, not water. Limit sweat-producing activities but drink water.
Ration water. Until you find a suitable source, ration your sweat, not your water. Limit activity and heat gain or loss.
You can estimate fluid loss by several means. A field dressing holds about 0.25 liters (1/4 canteen) of fluid. A soaked T-shirt holds 0.5 to 0.75 liters.
You can also use the pulse and breathing rate to estimate fluid loss. Use the following as a guide:
With a 0.75-liter loss the wrist pulse rate will be under 100 beats per minute and the breathing rate 12 to 20 breaths per minute.
With a 0.75- to 1.5-liter loss the pulse rate will be 100 to 120 beats per minute and 20 to 30 breaths per minute.
With a 1.5- to 2-liter loss the pulse rate will be 120 to 140 beats per minute and 30 to 40 breaths per minute. Vital signs above these rates require more advanced care.
FOOD
Although you can live several weeks without food, you need an adequate amount to stay healthy.  Food provides energy and replenishes the substances that your body burns. Food provides vitamins, minerals, salts, and other elements essential to good health. Possibly more important, it helps morale.
The three basic sources of food are plants, animals (including fish), and issued rations. In varying degrees, both provide the calories, carbohydrates, fats, and proteins needed for normal daily body functions. You should use rations to augment plant and animal foods, which will extend and help maintain a balanced diet.
Calories are a measure of heat and potential energy. The average person needs 2,000 calories per day to function at a minimum level. An adequate amount of carbohydrates, fats, and proteins without an adequate caloric intake will lead to starvation and cannibalism of the body's own tissue for energy.
Plants
Plant foods provide carbohydrates—the main source of energy. Many plants provide enough protein to keep the body at normal efficiency. Although plants may not provide a balanced diet, they will sustain you even in the arctic, where meat's heat-producing qualities are normally essential. Many plant foods such as nuts and seeds will give you enough protein and oils for normal efficiency. Roots, green vegetables, and plant foods containing natural sugar will provide calories and carbohydrates that give the body natural energy.
The food value of plants becomes more and more important if you are eluding the enemy or if you are in an area where wildlife is scarce. For instance—
You can dry plants by wind, air, sun, or fire. This retards spoilage so that you can store or carry the plant food with you to use when needed.
You can obtain plants more easily and more quietly than meat. This is extremely important when the enemy is near.
Animals
Meat is more nourishing than plant food. In fact, it may even be more readily available in some places. However, to get meat, you need to know the habits of and how to capture the various wildlife.
To satisfy your immediate food needs, first seek the more abundant and more easily obtained wildlife, such as insects, crustaceans, mollusks, fish, and reptiles. These can satisfy your immediate hunger while you are preparing traps and snares for larger game.
PERSONAL HYGIENE
In any situation, cleanliness is an important factor in preventing infection and disease. It becomes even more important in a survival situation. Poor hygiene can reduce your chances of survival.
A daily shower with hot water and soap is ideal, but you can stay clean without this luxury. Use a cloth and soapy water to wash yourself. Pay special attention to the feet, armpits, crotch, hands, and hair as these are prime areas for infestation and infection. If water is scarce, take an "air" bath. Remove as much of your clothing as practical and expose your body to the sun and air for at least 1 hour. Be careful not to sunburn.
If you don't have soap, use ashes or sand, or make soap from animal fat and wood ashes if your situation allows.


RandomUtils Class Reference
| Inherits from | NSObject |
|---|---|
| Declared in | RandomUtils.h RandomUtils.m |
+ randomIntBetweenMin:andMax:useSeed:
Returns random int between given minimum (inclusive) and maximum (inclusive) and option to use seed
+ (int)randomIntBetweenMin:(int)min andMax:(int)max useSeed:(BOOL)useSeed
Parameters
min |
Minimum value |
|---|---|
max |
Maximum value |
useSeed |
BOOL indicates if random generator should use seed |
Return Value
random int between min (inclusive) and max (inclusive)
See Also
Declared In
RandomUtils.h
+ randomIntBetweenMin:andMax:
Returns random int between given minimum (inclusive) and maximum (inclusive) without seed
+ (int)randomIntBetweenMin:(int)min andMax:(int)max
Parameters
min |
Minimum value |
|---|---|
max |
Maximum value |
Return Value
random int between min (inclusive) and max (inclusive)
Declared In
RandomUtils.h
+ randomFloatBetweenMin:andMax:useSeed:
Returns random float between given minimum (inclusive) and maximum (inclusive) and option to use seed
+ (float)randomFloatBetweenMin:(float)min andMax:(float)max useSeed:(BOOL)useSeed
Parameters
min |
Minimum value |
|---|---|
max |
Maximum value |
useSeed |
BOOL indicates if random generator should use seed |
Return Value
random float between min (inclusive) and max (inclusive)
Discussion
It’s guarantee that values will never go outside given range, but for floats it may never hit the minimum or maxmimum value due to float precision. Problem of calculating range is solved by scaling up float values.
See Also
Declared In
RandomUtils.h
+ randomFloatBetweenMin:andMax:
Returns random float between given minimum (inclusive) and maximum (inclusive) without seed
+ (float)randomFloatBetweenMin:(float)min andMax:(float)max
Parameters
min |
Minimum value |
|---|---|
max |
Maximum value |
Return Value
random float between min (inclusive) and max (inclusive)
Discussion
It’s guarantee that values will never go outside given range, but for floats it may never hit the minimum or maxmimum value due to float precision. Problem of calculating range is solved by scaling up float values.
Declared In
RandomUtils.h
+ randomEventOccurs:useSeed:
Checks if random event should happen based on a given probability from 0.0f to 100.0f (0.0f - never, 100.0f - always) and option to use seed
+ (BOOL)randomEventOccurs:(float)chance useSeed:(BOOL)useSeed
Parameters
chance |
Desired probability for an event |
|---|---|
useSeed |
BOOL indicates if random generator should use seed |
Return Value
results BOOL YES if event should occur, which means random probability > desired chance
See Also
Declared In
RandomUtils.h
+ randomEventOccurs:
Checks if random event should happen based on a given probability from 0.0f to 100.0f (0.0f - never, 100.0f - always) without seed
+ (BOOL)randomEventOccurs:(float)chance
Parameters
chance |
Desired probability for an event |
|---|
Return Value
results BOOL YES if event should occur, which means random probability > desired chance
Declared In
RandomUtils.h
+ randomStringNameWithLength:
Generates random name with desired length without seed. Name is generated using a-zA-z0-9 characters
+ (NSString *)randomStringNameWithLength:(int)length
Parameters
length |
desired length of string |
|---|
Return Value
name random name
Declared In
RandomUtils.h
+ randomStringNameWithLength:useSeed:
Generates random name with desired length. Name is generated using a-zA-z0-9 characters
+ (NSString *)randomStringNameWithLength:(int)length useSeed:(BOOL)useSeed
Parameters
length |
desired length of string |
|---|---|
useSeed |
BOOL indicates if random generator should use seed |
Return Value
name random name
Declared In
RandomUtils.h
+ randomStringNumberWithLength:
Generates random string using 0-9 characters without seed
+ (NSString *)randomStringNumberWithLength:(int)length
Parameters
length |
desired length of string |
|---|
Return Value
name random name
Declared In
RandomUtils.h
+ randomStringNumberWithLength:useSeed:
Generates random string using 0-9 characters
+ (NSString *)randomStringNumberWithLength:(int)length useSeed:(BOOL)useSeed
Parameters
length |
desired length of string |
|---|---|
useSeed |
BOOL indicates if random generator should use seed |
Return Value
name random name
Declared In
RandomUtils.h
+ randomStringWithCharctersFromString:andLength:
Generates random string using provided character from NSString without seed
+ (NSString *)randomStringWithCharctersFromString:(NSString *)charset andLength:(int)length
Parameters
charset |
string containing all available charaters to randomize from |
|---|---|
length |
desired length of string |
Return Value
name random string build from randomizing provided characters
Declared In
RandomUtils.h
+ randomStringWithCharctersFromString:andLength:useSeed:
Generates random string using provided character from NSString
+ (NSString *)randomStringWithCharctersFromString:(NSString *)charset andLength:(int)length useSeed:(BOOL)useSeed
Parameters
charset |
string containing all available charaters to randomize from |
|---|---|
length |
desired length of string |
useSeed |
BOOL indicates if random generator should use seed |
Return Value
name random string build from randomizing provided characters
Declared In
RandomUtils.h
+ randomElementFromArray:
Returns random element from an array
+ (id)randomElementFromArray:(NSArray *)array
Parameters
array |
array with elements |
|---|
Return Value
name random element (can be nil if array was nil)
Declared In
RandomUtils.h
+ randomElementFromArray:useSeed:
Returns random element from an array
+ (id)randomElementFromArray:(NSArray *)array useSeed:(BOOL)useSeed
Parameters
array |
array with elements |
|---|---|
useSeed |
BOOL indicates if random generator should use seed |
Return Value
name random element (can be nil if array was nil)
Declared In
RandomUtils.h
+ randomElementFromDictionary:
Returns random element from a dictionary
+ (id)randomElementFromDictionary:(NSDictionary *)dictionary
Parameters
dictionary |
dictionary with elements |
|---|
Return Value
name random element (can be nil if array was nil)
Declared In
RandomUtils.h
+ randomElementFromDictionary:useSeed:
Returns random element from a dictionary
+ (id)randomElementFromDictionary:(NSDictionary *)dictionary useSeed:(BOOL)useSeed
Parameters
dictionary |
dictionary with elements |
|---|---|
useSeed |
BOOL indicates if random generator should use seed |
Return Value
name random element (can be nil if array was nil)
Declared In
RandomUtils.h
+ randomIndexWeighted:
Randomize index value based on weights provided in array without seed
+ (int)randomIndexWeighted:(NSArray *)weights
Parameters
weights |
NSArray with NSNumbers with corresponding weights |
|---|
Return Value
index randomized index
Declared In
RandomUtils.h
+ randomIndexWeighted:useSeed:
Randomize index value based on weights provided in array
+ (int)randomIndexWeighted:(NSArray *)weights useSeed:(BOOL)useSeed
Parameters
weights |
NSArray with NSNumbers with corresponding weights |
|---|---|
useSeed |
BOOL indicates if random generator should use seed |
Return Value
index randomized index
Declared In
RandomUtils.h
+ randomKeyBasedOnWeights:
Randomize key based on weights provided in NSDictionary as key values (NSNumbers) without seed
+ (id)randomKeyBasedOnWeights:(NSDictionary *)weights
Parameters
weights |
NSDictionary with NSNumber values representing weight for key |
|---|
Return Value
key randomized key
Declared In
RandomUtils.h
+ randomKeyBasedOnWeights:useSeed:
Randomize key based on weights provided in NSDictionary as key values (NSNumbers)
+ (id)randomKeyBasedOnWeights:(NSDictionary *)weights useSeed:(BOOL)useSeed
Parameters
weights |
NSDictionary with NSNumber values representing weight for key |
|---|---|
useSeed |
BOOL indicates if random generator should use seed |
Return Value
key randomized key
Declared In
RandomUtils.h
+ randomColor
Randomize a color without seed
+ (UIColor *)randomColor
Return Value
random color
Declared In
RandomUtils.h
+ randomColorUseSeed:
Randomize a color without seed
+ (UIColor *)randomColorUseSeed:(BOOL)useSeed
Parameters
useSeed |
BOOL indicates if random generator should use seed |
|---|
Return Value
random color
Declared In
RandomUtils.h
+ shuffleArray:
Shuffles array
+ (void)shuffleArray:(NSMutableArray *)array
Parameters
array |
shuffled array |
|---|
Declared In
RandomUtils.h
+ shuffleArray:useSeed:
Shuffles array
+ (void)shuffleArray:(NSMutableArray *)array useSeed:(BOOL)useSeed
Parameters
array |
shuffled array |
|---|---|
useSeed |
BOOL indicates if random generator should use seed |
Declared In
RandomUtils.h
+ randomSeed
Generate random seed value that can be used for seeding
+ (unsigned)randomSeed
Return Value
random seed value
See Also
Declared In
RandomUtils.h
+ setSeed:
Set seed value for all seeded methods
+ (void)setSeed:(unsigned)seed
Parameters
seed |
Seed value |
|---|
Declared In
RandomUtils.h


| 1 | ||
| 2 | package paavohuh.sourcream.utils; | |
| 3 | ||
| 4 | import java.util.Optional; | |
| 5 | ||
| 6 | /** | |
| 7 | * Contains utility functions for working with Optional objects. | |
| 8 | */ | |
| 9 | public class OptionalUtils { | |
| 10 | /** | |
| 11 | * Takes a builder function, runs it and wrap the result into an Optional. | |
| 12 | * If the builder throws an exception, returns an empty Optional. | |
| 13 | * @param <T> The type stored in Optional | |
| 14 | * @param builder A function that might throw and returns an instance of T. | |
| 15 | * @return The result of the function call, or an empty Optional. | |
| 16 | */ | |
| 17 | public static <T> Optional<T> ofThrowing(ThrowingSupplier<T> builder) { | |
| 18 | try { | |
| 19 |
1
1. ofThrowing : mutated return of Object value for paavohuh/sourcream/utils/OptionalUtils::ofThrowing to ( if (x != null) null else throw new RuntimeException ) → KILLED |
return Optional.of(builder.get()); |
| 20 | } catch (Exception e) { | |
| 21 |
1
1. ofThrowing : mutated return of Object value for paavohuh/sourcream/utils/OptionalUtils::ofThrowing to ( if (x != null) null else throw new RuntimeException ) → KILLED |
return Optional.empty(); |
| 22 | } | |
| 23 | } | |
| 24 | | |
| 25 | @FunctionalInterface | |
| 26 | /** | |
| 27 | * A supplier that can throw exceptions. | |
| 28 | * @param <T> The value returned by the supplier. | |
| 29 | */ | |
| 30 | public interface ThrowingSupplier<T> { | |
| 31 | /** | |
| 32 | * Supplies a value of type T. | |
| 33 | * @return A value of type T. | |
| 34 | * @throws Exception Can throw any exception. | |
| 35 | */ | |
| 36 | T get() throws Exception; | |
| 37 | } | |
| 38 | } | |
Mutations | ||
| 19 |
1.1 |
|
| 21 |
1.1 |


Happy Shapes
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Number of Objects:
Go!
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Clear
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Select file type
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Chrome
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Google+
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width:
height
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random
always
never
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random
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never
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random
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always
never
opacity
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Class: ActiveRecord::Middleware::DatabaseSelector
| Relationships & Source Files | |
| Namespace Children | |
|
Classes:
| |
| Inherits: | Object |
| Defined in: | activerecord/lib/active_record/middleware/database_selector.rb, activerecord/lib/active_record/middleware/database_selector/resolver.rb, activerecord/lib/active_record/middleware/database_selector/resolver/session.rb |
Overview
Database Selector Middleware
The DatabaseSelector ::ActiveRecord::Middleware
provides a framework for automatically swapping from the primary to the replica database connection. Rails provides a basic framework to determine when to swap and allows for applications to write custom strategy classes to override the default behavior.
The resolver class defines when the application should switch (i.e. read from the primary if a write occurred less than 2 seconds ago) and a resolver context class that sets a value that helps the resolver class decide when to switch.
Rails default middleware uses the request’s session to set a timestamp that informs the application when to read from a primary or read from a replica.
To use the DatabaseSelector
in your application with default settings, run the provided generator.
bin/rails g active_record:multi_db
This will create a file named config/initializers/multi_db.rb
with the following contents:
Rails.application.configure do
config.active_record.database_selector = { delay: 2.seconds }
config.active_record.database_resolver = ActiveRecord::Middleware::DatabaseSelector::Resolver
config.active_record.database_resolver_context = ActiveRecord::Middleware::DatabaseSelector::Resolver::Session
end
Alternatively you can set the options in your environment config or any other config file loaded on boot.
The default behavior can be changed by setting the config options to a custom class:
config.active_record.database_selector = { delay: 2.seconds }
config.active_record.database_resolver = MyResolver
config.active_record.database_resolver_context = MyResolver::MySession
Note: If you are using rails new my_app --minimal
you will need to call require "active_support/core_ext/integer/time"
to load the core extension in order to use 2.seconds
Class Method Summary
Instance Attribute Summary
- #context_klass readonly
- #options readonly
- #resolver_klass readonly
Instance Method Summary
-
#call(env)
::ActiveRecord::Middleware
that determines which database connection to use in a multiple database application. - #select_database(request, &blk) private
Constructor Details
.new(app, resolver_klass = nil, context_klass = nil, options = {}) ⇒ DatabaseSelector
# File 'activerecord/lib/active_record/middleware/database_selector.rb', line 52
def initialize(app, resolver_klass = nil, context_klass = nil, = {}) @app = app @resolver_klass = resolver_klass || Resolver @context_klass = context_klass || Resolver::Session @options = end
Instance Attribute Details
#context_klass (readonly)
[ GitHub ]# File 'activerecord/lib/active_record/middleware/database_selector.rb', line 59
attr_reader :resolver_klass, :context_klass, :
#options (readonly)
[ GitHub ]# File 'activerecord/lib/active_record/middleware/database_selector.rb', line 59
attr_reader :resolver_klass, :context_klass, :
#resolver_klass (readonly)
[ GitHub ]# File 'activerecord/lib/active_record/middleware/database_selector.rb', line 59
attr_reader :resolver_klass, :context_klass, :
Instance Method Details
#call(env)
::ActiveRecord::Middleware
that determines which database connection to use in a multiple database application.
# File 'activerecord/lib/active_record/middleware/database_selector.rb', line 63
def call(env) request = ActionDispatch::Request.new(env) select_database(request) do @app.call(env) end end
#select_database(request, &blk) (private)
[ GitHub ]# File 'activerecord/lib/active_record/middleware/database_selector.rb', line 72
def select_database(request, &blk) context = context_klass.call(request) resolver = resolver_klass.call(context, ) response = if resolver.reading_request?(request) resolver.read(&blk) else resolver.write(&blk) end resolver.update_context(response) response end


The following is a video recording of this presentation.
"On Sunday, October 19th, I sat down in my San Francisco apartment with a glass of apple cider and a clear mind. After a period of reflection, I had an idea. While I'm not specifically trained as an author of prose, I am trained as an author of code. What would happen if I approached blogging from a software development perspective?"— Blogging like a hacker, Tom Preston-Werner, co-founder of Github
What would happen if we approached software documentation from a software development perspective?
| Modern-looking website | » Use Bootstrap |
| Re-use across outputs | » Separate config files |
| Version each release | » Copy file snaphots |
| Authenticate via Salesforce | » Upload into Salesforce |
| PDF for pre-sales distribution | » Use Prince XML + script |
| Publish to old and new system | » 2 layouts; links == variables |
| Integrate design into website | » Namespace classes, body only |
| Publish through engineering | » Wait ... build pipeline from git |
| Authenticate some content | » Use custom A/B testing tool |
| Enable engineers as authors | » Branches, Markdown, Git |
| Support localization— 3 langs | » Containers referencing HTML |
Or have your UX team build it
Store content in _includes folder. Then insert like this:
{% include myfile.html %}
Or with parameters:
{% include myfile.html audience="java-developers" %}
{% if site.audience == "administrators" %}
show this to administrators
{% elsif site.audience == "analysts" %}
show this to analysts
{% endif %}
Sample build command:
//build administrators output
jekyll build --config config_administrators.yml --destination ../outputs/admins
//build analysts output
jekyll build --config config_analysts.yml --destination ../outputs/analysts
- title: Overview
output: web, pdf
folderitems:
- title: Get started
url: /index.html
output: web, pdf
type: homepage
- title: Introduction
url: /mydoc_introduction.html
output: web, pdf
- title: Supported features
url: /mydoc_supported_features.html
output: web, pdf
Create the note.html include:
Note: {{include.content}}
Use it like this:
{% include note.html content="Note content here ..." %}
Or live without it.
Or have engineering custom-build it
Output page body to HTML, reincorporate body. Maintain frontmatter.
Or have engineering custom-build it
Tom Johnson
— idratherbewriting.com
— @tomjohnson
— tom@idratherbewriting.com


--- layout: post title: "Andy Rutledge: News Redux" ---
Rutledge’s online news redux has been linked around the internet like crazy this week and is of particular interest to me as someone who works on a news website for a living.
The most frustrating thing about reading the responses is the way it’s being treated as nothing more than an unsolicited NY Times redesign. This is not the case:
As with all of my previous redux efforts, this one is not a specific suggestion for how to precisely redesign a specific site. It’s just an exercise to discuss and examine specific issues via quickly-conceived, hastily-constructed visual comps.
The comps are just illustrations of his points. Everyone is ignoring this.
For what it’s worth, I find the NY Times homepage impossible to use. It’s like staring into a bowl of alphabet soup looking for words. Rutledge’s comp looks like something I want to use, his points make sense and resonate with me.
Gruber linked to a response by Joshua Benton which perfectly demonstrates the thought pattern that creates these shambles in the first place.
Similarly, stripping stories down to just headlines — no intro text, which Rutledge dislikes for some reason, no thumbnails — may maximize typographic beauty, but it doesn’t do much for enticing a click.
As Gruber pointed out, CPM advertising is a disease eating these websites from the inside out. Even at my place of work, a non-commercial operation, a click is valued highly because page visits are considered markers of success. This is the wrong metric. Attention, engagement, satisfaction and loyalty should define success.
Rutledge’s design, on a commonly sized laptop screen (1440×990), would link to exactly three stories in the first screenful of content. The Times’ current Politics page links to 13.
People know how to scroll. People can’t read 13 stories at once. People can’t click on 13 stories at once. Respect your users by treating them like they know how to use a computer. Treat them like humans. How many stories does the print edition of today’s NY Times have above the fold (the real one)? Three.
The Times generates a ton of content every day. Looking at Times Wire, I see 169 stories published just in the past 18 hours — and I don’t believe that’s actually capturing everything that flows through the Times’ blogs and sundry other online spaces.
Having a lot of something is only reason to organise more effectively, and reason against dumping the whole lot in the one place. The NY Time’s homepage says to me: “we have a lot of content, too much for us to deal with it, here it all is, you deal with it”.
Paul Scrivens sees it:
Instead of trying to narrow down what content needs to be shown on the homepage, they try to find ways to ensure that all content is shown on the homepage.
Khoi, previous director of design at nytimes.com, ended up responding to the piece but unfortunately dealt with it as nothing more than a redesign, just as everyone else.
I’ll close with something I think is important and for which a trend seems to be starting. Newspapers aren’t expensive but they’re not free. Rutledge is all for paid subscriptions, as am I:
Quality news is valuable. It must therefore have a cost. Quality news is subscription only. You pay for valuable information. Fluff you get for free.
Making something people want to buy has been the way newspapers have worked (and flourished) for over 100 years. It’s baffling why they’re abandoning it to their detriment as soon as they step onto the web.