|
OR-Tools
7.1
Google Optimization software suite
|
#include <bop_base.h>
Public Types | |
| enum | Status { OPTIMAL_SOLUTION_FOUND, SOLUTION_FOUND, INFEASIBLE, LIMIT_REACHED, INFORMATION_FOUND, CONTINUE, ABORT } |
Public Member Functions | |
| BopOptimizerBase (const std::string &name) | |
| virtual | ~BopOptimizerBase () |
| const std::string & | name () const |
| virtual bool | ShouldBeRun (const ProblemState &problem_state) const =0 |
| virtual Status | Optimize (const BopParameters ¶meters, const ProblemState &problem_state, LearnedInfo *learned_info, TimeLimit *time_limit)=0 |
Static Public Member Functions | |
| static std::string | GetStatusString (Status status) |
Protected Attributes | |
| const std::string | name_ |
| StatsGroup | stats_ |
Definition at line 40 of file bop_base.h.
| Enumerator | |
|---|---|
| OPTIMAL_SOLUTION_FOUND | |
| SOLUTION_FOUND | |
| INFEASIBLE | |
| LIMIT_REACHED | |
| INFORMATION_FOUND | |
| CONTINUE | |
| ABORT |
Definition at line 61 of file bop_base.h.
|
explicit |
|
virtual |
|
inline |
Definition at line 46 of file bop_base.h.
|
pure virtual |
|
pure virtual |
|
static |
|
protected |
Definition at line 98 of file bop_base.h.
|
mutableprotected |
Definition at line 100 of file bop_base.h.


Lesson 1 ‑ Hike early
Amy and I woke up late. We slept in, ate a hardy breakfast, and took our time.
This was unwise.
Pike's Peak is over 14,000 feet tall. Departing the Devil's Playground trailhead (already at an elevation of 9,000 feet) at 11:00am, we didn't make Devil's Playground until 3 hours later...We still had 3 hours to the summit. We decided to turn around so as to make it back before dark. This was wise.
Lesson 2 ‑ Dress appropriately
A Missouri native, I vastly underestimated Colorado's climate in October. At 9,000 feet, it was a typical autumn day. Tons of trees, sturdy ground, and fresh breeze. Pants, athletic shoes, thermal underwear, and a hoodie seemed to do the trick. At 13,000 feet, the mountain is a terrifying snowy moon-scape. I can't adequately stress the contrast. Above treeline, the snow piled up to four feet deep. Traversing a rock-field, (we weren't aware there was rock until my foot sank into a white void, almost snapping my ankle) I realized more robust clothing was needed. And by "more robust", I mean snow leopard hide.
Lesson 3 ‑ Think about wildlife defense
I wasn't even thinking about bears. At least, not until we saw bear tracks. I had no firearm, no hatchet, no bear spray (that term sounds insane), no knife, no club.
All I had were my bear hands (zing!), and my wits (which were already on the fritz...see Lessons 1 and 2 above).
Men, it's your duty to protect your wife. Think about bears when planning to hike with her.
Lesson 4 ‑ Know how to get back
At 2pm, having ascended to Devil's Playground, we decided to throw in the towel and call it quits...the summit wouldn't be made this day. That's when some very visceral terror set in. Turning around and following our footprints across a sea of white, we came upon a crest which framed our vantage point for the way down the monolith. Up to this point, we'd been following another hiker's footprints. Amy and I had not seen this hiker all day, but we found our way up the mountain side using their path. These footprints (and ours) were now gone.
We peered down and saw only miles of treeline a long, frigid distance away. The trail back was gone, hidden beneath the quiet whiteness that had once before been so beautiful. Our hearts had become like our limbs, frozen, bloodless, and numb. We had no idea which iota of treeline to head for. Amy and I started bustling down, half-way panicking, and for 20 minutes prayed Jesus would help us. I spotted some craigs to our right that looked familiar and we headed towards them. After trudging back across the snow-covered rock-field I mentioned earlier, we noticed a thin, band of darkness 200 yards away. It was the trail. Our hope landed. We frantically bounded towards it and began our swift, knee-pounding, 2 hour descent.
ALWAYS BE AWARE WHERE YOU'RE GOING AND HOW TO GET BACK.
We eventually got home around 5 and enjoyed a hot meal. Our trip could have easily ended with newspaper headlines proclaiming "Newly-weds Dissapear in Colorado" or "Missouri Dolt Leads Wife to Her Death". However, me made it back safely and now have knowledge and wisdom to share with others.
Heed our advice. Plan well, stay aware, start early, fight bears.


Avi Bagla is a student at Stanford University. He currently getting his bachelor's degree in Symbolic Systems with a concentration in Human Computer Interaction. He loves to make movies and take photos in his free time.John Hennessy is the president of Stanford University. He takes HCI classes in his spare time.


Quotes
Every culture has its share of wise proverbs or sayings, usually single sentences, passed down from one generation to the next. While these sayings may vary from one language, culture, and country to another, the wisdom they convey is universal.


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Class HashOperator¶
- Defined in File Hash.h
Inheritance Relationships¶
Derived Type¶
public Azura::FNVHashOperator
(Class FNVHashOperator)
Class Documentation¶
-
class
HashOperator
¶ Subclassed by Azura::FNVHashOperator
Public Functions
-
virtual
~HashOperator
()¶
-
HashOperator
()¶
-
HashOperator
(const HashOperator &other)¶
-
HashOperator
(HashOperator &&other)¶
-
HashOperator &
operator=
(const HashOperator &other)¶
-
HashOperator &
operator=
(HashOperator &&other)¶
-
HashOperator
(SizeType seed)¶
-
virtual SizeType
evaluate
(const void *bytes, U32 numBytes) const = 0¶
-
virtual SizeType
evaluate
(const char *bytes, U32 len) const = 0¶
-
virtual SizeType
evaluate
(const int &num) const = 0¶
Protected Attributes
-
SizeType
mSeed
= {2166136261}¶
-
virtual


Mandelbrot and Julia sets#
Plots the Mandelbrot and Julia sets for general polynomial maps in the complex plane.
The Mandelbrot set is the set of complex numbers \(c\) for which the map \(f_c(z)\) does not diverge when iterated from \(z = 0\). This set of complex numbers can be visualized by plotting each value for \(c\) in the complex plane. The Mandelbrot set is often an example of a fractal when plotted in the complex plane. For general one parameter families of polynomials, the mandelbrot set is the parameter values for which the orbits of all critical points remains bounded.
The Julia set for a given parameter \(c\) is the set of complex numbers for which the function \(f_c(z)\) is bounded under iteration.
AUTHORS:
Ben Barros
- sage.dynamics.complex_dynamics.mandel_julia.external_ray(theta, **kwds)#
Draws the external ray(s) of a given angle (or list of angles) by connecting a finite number of points that were approximated using Newton’s method. The algorithm used is described in a paper by Tomoki Kawahira.
REFERENCE:
INPUT:
theta
– double or list of doubles, angles between 0 and 1 inclusive.
kwds:
image
– 24-bit RGB image (optional - default: None) user specified image of Mandelbrot set.D
– long (optional - default:25
) depth of the approximation. AsD
increases, the external ray gets closer to the boundary of the Mandelbrot set. If the ray doesn’t reach the boundary of the Mandelbrot set, increaseD
.S
– long (optional - default:10
) sharpness of the approximation. Adjusts the number of points used to approximate the external ray (number of points is equal toS*D
). If ray looks jagged, increaseS
.R
– long (optional - default:100
) radial parameter. IfR
is large, the external ray reaches sufficiently close to infinity. IfR
is too small, Newton’s method may not converge to the correct ray.prec
– long (optional - default:300
) specifies the bits of precision used by the Complex Field when using Newton’s method to compute points on the external ray.ray_color
– RGB color (optional - default:[255, 255, 255]
) color of the external ray(s).
OUTPUT:
24-bit RGB image of external ray(s) on the Mandelbrot set.
EXAMPLES:
sage: external_ray(1/3) 500x500px 24-bit RGB image
sage: external_ray(0.6, ray_color=[255, 0, 0]) 500x500px 24-bit RGB image
sage: external_ray([0, 0.2, 0.4, 0.7]) 500x500px 24-bit RGB image
sage: external_ray([i/5 for i in range(1,5)]) 500x500px 24-bit RGB image
WARNING:
If you are passing in an image, make sure you specify which parameters to use when drawing the external ray. For example, the following is incorrect:
sage: M = mandelbrot_plot(x_center=0) # not tested sage: external_ray(5/7, image=M) # not tested 500x500px 24-bit RGB image
To get the correct external ray, we adjust our parameters:
sage: M = mandelbrot_plot(x_center=0) sage: external_ray(5/7, x_center=0, image=M) 500x500px 24-bit RGB image
Todo
The
copy()
function for bitmap images needs to be implemented in Sage.
- sage.dynamics.complex_dynamics.mandel_julia.julia_plot(f=None, **kwds)#
Plots the Julia set of a given polynomial
f
. Users can specify whether they would like to display the Mandelbrot side by side with the Julia set with themandelbrot
argument. Iff
is not specified, this method defaults to \(f(z) = z^2-1\).The Julia set of a polynomial
f
is the set of complex numbers \(z\) for which the function \(f(z)\) is bounded under iteration. The Julia set can be visualized by plotting each point in the set in the complex plane. Julia sets are examples of fractals when plotted in the complex plane.ALGORITHM:
Let \(R_c = \bigl(1 + \sqrt{1 + 4|c|}\bigr)/2\) if the polynomial is of the form \(f(z) = z^2 + c\); otherwise, let \(R_c = 2\). For every \(p \in \mathbb{C}\), if \(|f^{k}(p)| > R_c\) for some \(k \geq 0\), then \(f^{n}(p) \to \infty\). Let \(N\) be the maximum number of iterations. Compute the first \(N\) points on the orbit of \(p\) under \(f\). If for any \(k < N\), \(|f^{k}(p)| > R_c\), we stop the iteration and assign a color to the point \(p\) based on how quickly \(p\) escaped to infinity under iteration of \(f\). If \(|f^{i}(p)| \leq R_c\) for all \(i \leq N\), we assume \(p\) is in the Julia set and assign the point \(p\) the color black.
INPUT:
f
– input polynomial (optional - default:z^2 - 1
).period
– list (optional - default:None
), returns the Julia set for a random \(c\) value with the given (formal) cycle structure.mandelbrot
– boolean (optional - default:True
), when set toTrue
, an image of the Mandelbrot set is appended to the right of the Julia set.point_color
– RGB color (optional - default:'tomato'
), color of the point \(c\) in the Mandelbrot set (any valid input for Color).x_center
– double (optional - default:-1.0
), Real part of center point.y_center
– double (optional - default:0.0
), Imaginary part of center point.image_width
– double (optional - default:4.0
), width of image in the complex plane.max_iteration
– long (optional - default:500
), maximum number of iterations the map \(f(z)\).pixel_count
– long (optional - default:500
), side length of image in number of pixels.base_color
– hex color (optional - default:'steelblue'
), color used to determine the coloring of set (any valid input for Color).level_sep
– long (optional - default: 1), number of iterations between each color level.number_of_colors
– long (optional - default: 30), number of colors used to plot image.interact
– boolean (optional - default:False
), controls whether plot will have interactive functionality.
OUTPUT:
24-bit RGB image of the Julia set in the complex plane.
Todo
Implement the side-by-side Mandelbrot-Julia plots for general one-parameter families of polynomials.
EXAMPLES:
The default
f
is \(z^2 - 1\):sage: julia_plot() 1001x500px 24-bit RGB image
To display only the Julia set, set
mandelbrot
toFalse
:sage: julia_plot(mandelbrot=False) 500x500px 24-bit RGB image
sage: R.<z> = CC[] sage: f = z^3 - z + 1 sage: julia_plot(f) # long time 500x500px 24-bit RGB image
To display an interactive plot of the Julia set in the Notebook, set
interact
toTrue
. (This is only implemented for polynomials of the formf = z^2 + c
):sage: julia_plot(interact=True) ...interactive(children=(FloatSlider(value=-1.0, description='Real c'... :: sage: R.<z> = CC[] sage: f = z^2 + 1/2 sage: julia_plot(f,interact=True) ...interactive(children=(FloatSlider(value=0.5, description='Real c'...
To return the Julia set of a random \(c\) value with (formal) cycle structure \((2,3)\), set
period = [2,3]
:sage: julia_plot(period=[2,3]) 1001x500px 24-bit RGB image
To return all of the Julia sets of \(c\) values with (formal) cycle structure \((2,3)\):
sage: period = [2,3] # not tested ....: R.<c> = QQ[] ....: P.<x,y> = ProjectiveSpace(R,1) ....: f = DynamicalSystem([x^2+c*y^2, y^2]) ....: L = f.dynatomic_polynomial(period).subs({x:0,y:1}).roots(ring=CC) ....: c_values = [k[0] for k in L] ....: for c in c_values: ....: julia_plot(c)
Polynomial maps can be defined over a polynomial ring or a fraction field, so long as
f
is polynomial:sage: R.<z> = CC[] sage: f = z^2 - 1 sage: julia_plot(f) 1001x500px 24-bit RGB image
sage: R.<z> = CC[] sage: K = R.fraction_field(); z = K.gen() sage: f = z^2-1 sage: julia_plot(f) 1001x500px 24-bit RGB image
Interact functionality is not implemented if the polynomial is not of the form \(f = z^2 + c\):
sage: R.<z> = CC[] sage: f = z^3 + 1 sage: julia_plot(f, interact=True) Traceback (most recent call last): ... NotImplementedError: The interactive plot is only implemented for ...
- sage.dynamics.complex_dynamics.mandel_julia.kneading_sequence(theta)#
Determines the kneading sequence for an angle theta in RR/ZZ which is periodic under doubling. We use the definition for the kneading sequence given in Definition 3.2 of [LS1994].
INPUT:
theta
– a rational number with odd denominator
OUTPUT:
a string representing the kneading sequence of theta in RR/ZZ
REFERENCES:
EXAMPLES:
sage: kneading_sequence(0) '*'
sage: kneading_sequence(1/3) '1*'
Since 1/3 and 7/3 are the same in RR/ZZ, they have the same kneading sequence:
sage: kneading_sequence(7/3) '1*'
We can also use (finite) decimal inputs, as long as the denominator in reduced form is odd:
sage: kneading_sequence(1.2) '110*'
Since rationals with even denominator are not periodic under doubling, we have not implemented kneading sequences for such rationals:
sage: kneading_sequence(1/4) Traceback (most recent call last): ... ValueError: input must be a rational number with odd denominator
- sage.dynamics.complex_dynamics.mandel_julia.mandelbrot_plot(f=None, **kwds)#
Plot of the Mandelbrot set for a one parameter family of polynomial maps.
The family \(f_c(z)\) must have parent
R
of the formR.<z,c> = CC[]
.REFERENCE:
INPUT:
f
– map (optional - default:z^2 + c
), polynomial family used to plot the Mandelbrot set.parameter
– variable (optional - default:c
), parameter variable used to plot the Mandelbrot set.x_center
– double (optional - default:-1.0
), Real part of center point.y_center
– double (optional - default:0.0
), Imaginary part of center point.image_width
– double (optional - default:4.0
), width of image in the complex plane.max_iteration
– long (optional - default:500
), maximum number of iterations the mapf_c(z)
.pixel_count
– long (optional - default:500
), side length of image in number of pixels.base_color
– RGB color (optional - default:[40, 40, 40]
) color used to determine the coloring of set.level_sep
– long (optional - default: 1) number of iterations between each color level.number_of_colors
– long (optional - default: 30) number of colors used to plot image.interact
– boolean (optional - default:False
), controls whether plot will have interactive functionality.
OUTPUT:
24-bit RGB image of the Mandelbrot set in the complex plane.
EXAMPLES:
sage: mandelbrot_plot() 500x500px 24-bit RGB image
sage: mandelbrot_plot(pixel_count=1000) 1000x1000px 24-bit RGB image
sage: mandelbrot_plot(x_center=-1.11, y_center=0.2283, image_width=1/128, # long time ....: max_iteration=2000, number_of_colors=500, base_color=[40, 100, 100]) 500x500px 24-bit RGB image
To display an interactive plot of the Mandelbrot in the Notebook, set
interact
toTrue
. (This is only implemented forz^2 + c
):sage: mandelbrot_plot(interact=True) ...interactive(children=(FloatSlider(value=0.0, description='Real center', max=1.0, min=-1.0, step=1e-05), FloatSlider(value=0.0, description='Imag center', max=1.0, min=-1.0, step=1e-05), FloatSlider(value=4.0, description='Width', max=4.0, min=1e-05, step=1e-05), IntSlider(value=500, description='Iterations', max=1000), IntSlider(value=500, description='Pixels', max=1000, min=10), IntSlider(value=1, description='Color sep', max=20, min=1), IntSlider(value=30, description='# Colors', min=1), ColorPicker(value='#ff6347', description='Base color'), Output()), _dom_classes=('widget-interact',))
sage: mandelbrot_plot(interact=True, x_center=-0.75, y_center=0.25, ....: image_width=1/2, number_of_colors=75) ...interactive(children=(FloatSlider(value=-0.75, description='Real center', max=1.0, min=-1.0, step=1e-05), FloatSlider(value=0.25, description='Imag center', max=1.0, min=-1.0, step=1e-05), FloatSlider(value=0.5, description='Width', max=4.0, min=1e-05, step=1e-05), IntSlider(value=500, description='Iterations', max=1000), IntSlider(value=500, description='Pixels', max=1000, min=10), IntSlider(value=1, description='Color sep', max=20, min=1), IntSlider(value=75, description='# Colors', min=1), ColorPicker(value='#ff6347', description='Base color'), Output()), _dom_classes=('widget-interact',))
Polynomial maps can be defined over a multivariate polynomial ring or a univariate polynomial ring tower:
sage: R.<z,c> = CC[] sage: f = z^2 + c sage: mandelbrot_plot(f) 500x500px 24-bit RGB image
sage: B.<c> = CC[] sage: R.<z> = B[] sage: f = z^5 + c sage: mandelbrot_plot(f) # long time 500x500px 24-bit RGB image
When the polynomial is defined over a multivariate polynomial ring it is necessary to specify the parameter variable (default parameter is
c
):sage: R.<a,b> = CC[] sage: f = a^2 + b^3 sage: mandelbrot_plot(f, parameter=b) # long time 500x500px 24-bit RGB image
Interact functionality is not implemented for general polynomial maps:
sage: R.<z,c> = CC[] sage: f = z^3 + c sage: mandelbrot_plot(f, interact=True) Traceback (most recent call last): ... NotImplementedError: interact only implemented for z^2 + c


Making a Chrissy Teigen Bot (Summer Project 1)
In addition to organizing the March for Science Student Summit (shameless plug - more information here), I am trying my hand at a new machine learning project! I’ve never worked with natural language processing before, and wanted to learn about data mining, so I decided to make a program that creates tweets based on training data from a particular user.
Initially, I wanted to use myself, but I needed a large enough dataset to even have a shot at generative realistic tweets. I also needed a user that was not likely to become… problematic (a la Microsoft’s super racist twitter bot). After a thorough search (read: I opened Twitter and scrolled twice), I found the perfect person - Chrissy Teigen!
So far, I’ve downloaded the tweets using the Tweepy API and done some light pre-processing to remove unncesessary metadata. I’m planning to pick a model over the next couple days, and will update this post as things happen!
You can follow my progress on GitHub here: https://github.com/harrodjordan/ItsChrissy
Done
-
Learned to use Tweepy
-
Downloaded roughly 3000 tweets


I'm a Celebrity Roman Kemp's confusion over Jane McDonald picture gets heated
Who would have thought that 90s singer Jane McDonald would be at the centre of argument?
by Katie-Ann GupwellIt's the luxury item that has, perhaps, raised a few eyebrows over the past 24 hours.
On Monday night's episode of I'm A Celebrity Get Me Out Of Here, viewers were left baffled at the choice of Adele Roberts' luxury item.
The Radio 1 DJ opted for a little more unusual option than the most - a photograph of Loose Women star and cruise ship legend Jane McDonald.
It was hoped the image would bring her luck during her stint in the jungle.
But, on Tuesday night's episode, it appears a few people in the Main Camp are just as baffled as the viewers at home.
In fact, things started to get a little heated when Roman commented on the Jane McDonald picture.
Kate said: “Jane McDonald is looking over us, can you think of a song of hers?”
“I know her off Loose Women, I don’t know her actual songs but I know her from the cruising show when she does covers," replied Adele.
Myles and Roman laughed and said: “No one knows what she does.”
Kate said: “She’s a legend.”
This is where things started to take a little turn for the worse.
"She’s a legend is she?" Roman said. "Name a song?”
Kate couldn’t think of one, which led to some chuckling from Myles and Roman.
Adele was then quick to reply, saying: “She’ll cruise around the world, for example she’d go to Iceland and then sing a Bjork or would go to the USA and sing Proud Mary.”
Roman said: “It’s just random mate.”
“Why though? I don’t understand," responded Adele.
“How is it not random?” commented Roman.
“But if I had brought in a picture of Ru-Paul would you have the same reaction?” asked Adele.
Roman responded by saying he didn’t know and that he just thought it was random.
Adele then hit back, saying: “That’s prejudice, I’m allowed to like what I want.”
By this point, Roman had realised he'd started to wind her up a bit, and began to apoligise.
“I wasn’t saying that at all," he said. "I’m sorry, I didn’t mean to.”
Adele replied: “It’s like you’re saying ‘why would I like Jane McDonald?’”
“Adele it’s not," he said. "The situation is funny.”
Roman continued to apologise before Adele claimed: "It’s fine, you are just going on about it so much…”
While Kate tried to explain it was just a bit of fun around the camp, Roman tried to end the conversation claiming he liked the picture being there.
The Jane McDonald fuelled spat eventually ended with a hug.


bson_zero_free()
Synopsis
void bson_zero_free (void *mem, size_t size);
Parameters
mem |
A memory region. |
size |
The size of mem. |
Description
This function behaves like bson_free() except that it zeroes the memory first. This can be useful if you are storing passwords or other similarly important data. Note that if it truely is important, you probably want an mlock()'d page as well to prevent it swapping to disk.


George’s New To Do List: 2018-2022
- Work to re-zone piece of Heritage Forest to rental housing zone
- Complete new plans to build 12 to 18 affordable rental housing units on the Galiano Green site
- Include Galiano in $50 million fibre optic project that presently only includes Saturna, Penders, Saltspring, Thetis and Valdez
- Provide emergency evacuation route on east side of Galiano in case fire, earthquake, landslide and trees blocking Porlier Pass
- Adopt new policy to promote rain water harvesting and storage to protect Galiano’s aquifers and the forests
- Consider application of Crystal Mountain Retreat Centre and transfer of 75% of land to Islands Trust Conservancy
- Ensure new land use rezoning applications are guided by Galiano’s Official Community Plan
- Respond to new Advisory Planning Committee’s Affordable Housing Study
- Restore civility to monthly Local Trust Committee meetings


- filter(Filter) - Method in class org.mockito.junit.MockitoJUnitRunner
-
- filter(Filter) - Method in class org.mockito.runners.ConsoleSpammingMockitoJUnitRunner
-
Deprecated.
- filter(Filter) - Method in class org.mockito.runners.MockitoJUnitRunner
-
Deprecated.
- filter(Filter) - Method in class org.mockito.runners.VerboseMockitoJUnitRunner
-
Deprecated.
- find(String) - Static method in class org.mockito.AdditionalMatchers
-
String argument that contains a substring that matches the given regular
expression.
- finishMocking() - Method in interface org.mockito.MockitoSession
-
Must be invoked when the user is done with mocking for given session (test method).
- finishMocking(Throwable) - Method in interface org.mockito.MockitoSession
-
Must be invoked when the user is done with mocking for given session (test method).
- floatThat(ArgumentMatcher<Float>) - Static method in class org.mockito.ArgumentMatchers
-
Allows creating custom float
argument matchers.
- floatThat(Matcher<Float>) - Static method in class org.mockito.hamcrest.MockitoHamcrest
-
Enables integrating hamcrest matchers that match primitive float
arguments.
- forClass(Class<S>) - Static method in class org.mockito.ArgumentCaptor
-
Build a new ArgumentCaptor
.
- framework() - Static method in class org.mockito.Mockito
-
For advanced users or framework integrators.
- FriendlyReminderException - Exception in org.mockito.exceptions.misusing
-
- FriendlyReminderException(String) - Constructor for exception org.mockito.exceptions.misusing.FriendlyReminderException
-


This is dog named “Bo” is two years old. He lives with us on the ranch. He likes to spend his days at the barn with the horses and his nights watching TV.
Bo lives with four other dogs. His favorite times of the day are breakfast and lunch.
An agility course consists of a set of standard obstacles laid out


AlgoKittens are Non-Fungible Tokens (NFTs) on Algorand.
Each AlgoKitten is unique and has it's own MEOW token.
Each token links to an unique IPFS CID.
The first 10 AlgoKittens were minted on the 19th of April 2021.
All AlgoKittens are distributed through Reddit and Twitter giveaways.
Twitter: @AlgoKittens
Reddit: r/AlgoKittens
Telegram: https://t.me/AlgoKittens


If we don't have present perfect we will suffer in the pain to explain current moments of our life, e.g.
He studied all night (before exams) vs He has studied up to now (And he is exosted)
He spill his coffee vs He has spilled his coffee (at that moment)
He didn't see the ocean ( becouse he moved to middle of continent) vs (at that moment)
And we can't just skip it.
We even have to use it from time to time, without any options.


Janus VR Guide Janus VR Markup language Janus VR FAQs JavaScript API(Janus)
| Action | Command |
| Open/Close portal | Left mouse button |
| Select/Deselect websuface | Left mouse button - Right mouse button |
| Rotate body | Mouse Left/Right or Q/E |
| Walk in direction | W (forward) - S (backward) - A (Left) - D (Right) or Cursor keys |
| Run | Hold shift |
| Jump | Spacebar |
| Text chat | T |
| Flight mode | F |
| Action | Command |
| Re-centre Oculus Rift | R |
| Voice chat | Left Alt |
| Text chat | T |
| New portal | Tab |
| Mute | M |
| Menu | Escape |
| Smallthumb (door size) | F7 |
| Screenshot | F8 |
| Release mouse | F9 |
| Fullscreen | F11 |
| Info | Forward or back slash |
| Show chat | C |
Make sure editing mode is enabled in the escape menu and editing mode has been enabled for that room (this is up to the discretion of the room owner).
| Action | Command |
| Select | Right click on object |
| Choose property | Tab |
| Modify property | W,A,S,D,Q,E |
| Accept change | Left click |
| Cancel change | Right click |
| Delete selected | Delete or backspace |
| Copy selected | Control + C |
| Paste selected | Control + V |
| New object | Right click blank area |
| New image | Control + right click blank area |
| New text | Shift + right click blank area |
| Snap amount | 1,2,3,4 |
| Save room | Control + S |
| Reload room | Control + R |
| Bookmark room | Control + B |
These commands can be entered into the chat window, your current settings can be found in the userid.txt file in your Janus VR folder, if you are unsure of changing any settings then you probably should leave them alone.
WARNING: If make changes that render Janus unusable you can remove settings.txt from your Janus VR directory to revert to default settings.
| Action | Command |
| #userid | Change your name* |
| #sync | Sync objects with other players |
| #eye_pos | Change your view position |
| #eye_ipd | Changes distance between eyes |
| #head_pos | Changes your head position |
| #clearchat | Clears the chatlog |
| #scale | Scales your avatar |
| #pos | Changes your position |
| #lighting_false | Lighting true or false |
| #cull_face_back | Cull face back, front or none |
| #head_src | Url to head .obj / .dae |
| #head_mtl | Url to head .mtl |
| #body_src | Url to body .obj / .dae |
| #budy_mtl | Url to body .mtl |
*Your name should be the same as you use in the mumble chat.


The Joseki servlet can be installed in any servlet container or web application server, such as Jetty or Tomcat.
Every web application server is different - you will need to read the documentation for your particular server.
Note that the web.xml
file routes requests to the Joseki servlet
and needs to be aligned with the Joseki configuration file.


⚾ 📻 🌧
You're sitting on your porch, looking out while the thunderstorm rages.
The AM radio in the kitchen is playing the baseball game.
Life is good.
{title}
Thunderstorm
Thank you to archive.org for the CC audio.


That's $1,992 in interest on a $300 loan - about $75 every two weeks. Payday lenders tend to break their loans down into smaller amounts in order to make it seem like less. Rather than saying $1,992 in interest every year, or even $75 every two weeks on a $300 loan, they would say, "Our fee is $25 for every $100 you borrow, paid back after two weeks." If that 2 weeks ends, and you can't re-pay the loan...another $25 for every $100 is charged. For a borrower struggling to make ends meet, the fees add up like clockwork.
in-context


N
Work
WP Engine
Workflowy
Maintenance Tool
Google Domains
Development
Regexr
Utilities
Font Awesome 4
Personal
My Website


Offers
Requests
Messages
(5 TODO)
TODO: First lastname
Profile
Logout
Login
Register
Add Listing
Offers
3 result(s)
Keywords
Category
Offer type
Price (EUR)
Negotiable price
Availability
Start
End
Search
Offer name
Sponsored
Description of offer:
offer.price EUR / offer.pricePeriod


For more information about the attributes you can use with these commands, see connector in the qdrouterd.conf
man page.
|
Note
|
The commands in this table demonstrate operations on the local router listening on localhost and the default AMQP port (5672). If you want to perform an operation on a different router in the router network, you must specify the necessary connection options. For more information, see Connection Options in the qdmanage man page. |
| To… | Use this command… |
|---|---|
View the router’s connectors |
qdmanage query --type=connector |
View the roles and ports on which the router can connect to other endpoints |
qdmanage query role port --type=connector |
If the router is connected to a broker, view the alternate URLs on which the router can connect to the broker if the primary connection fails |
qdmanage query failoverUrls --type=connector --name=CONNECTOR_NAME |
View the attributes configured for a connector |
qdmanage read --name=CONNECTOR_NAME |
Create a connector |
qdmanage create --type=connector --ATTRIBUTE=VALUE ... |
Create multiple connectors |
These commands use a JSON map to create two connectors. |
Update a connector |
qdmanage update --type=connector --ATTRIBUTE=VALUE ... |
Update multiple connectors |
These commands use a JSON map to update two connectors. |
Delete an attribute from a connector |
qdmanage update --type=connector --ATTRIBUTE |
Delete a connector |
qdmanage delete --name=CONNECTOR_NAME |
Dispatch Router supports both SSL/TLS and SASL security protocols for encrypting and authenticating incoming and outgoing connections for your routers. You can use qdmanage
to view, create, update, and delete security policies for any router in your router network.
Dispatch Router supports SSL/TLS for certificate-level encryption and mutual authentication. The following table lists the common qdmanage
commands you can use to secure incoming and outgoing connections for a router in your router network.
For more information about the attributes you can use with these commands, see sslProfile and listener in the qdrouterd.conf
man page.
|
Note
|
The commands in this table demonstrate operations on the local router listening on localhost and the default AMQP port (5672). If you want to perform an operation on a different router in the router network, you must specify the necessary connection options. For more information, see Connection Options in the qdmanage man page. |
| To… | Use this command… |
|---|---|
View the router’s SSL configuration |
qdmanage query --type=sslProfile |
Set up SSL for the router |
qdmanage create --type=sslProfile --name=NAME --certDB=PATH --certFile=PATH --privateKeyFile=PATH --ATTRIBUTE=VALUE ... |
Add SSL/TLS encryption to an incoming connection |
qdmanage update --name=LISTENER_NAME --sslProfile=NAME --requireSsl=yes |
Change SSL/TLS encryption on an incoming connection |
qdmanage update --name=LISTENER_NAME --ATTRIBUTE=VALUE ... |
Add SSL/TLS client authentication to an incoming connection |
qdmanage update --name=LISTENER_NAME --authenticatePeer=yes |
Remove SSL/TLS client authentication from an incoming connection |
qdmanage update --name=LISTENER_NAME --authenticatePeer=no |
Add SSL/TLS client authentication to an outgoing connection |
qdmanage update --name=CONNECTOR_NAME --sslProfile=NAME |
Remove SSL/TLS client authentication from an outgoing connection |
qdmanage update --name=CONNECTOR_NAME --sslProfile |
Delete an SSL profile |
qdmanage delete --name=SSL_PROFILE_NAME |
Dispatch Router supports SASL for authentication and payload encryption. The following table lists the common qdmanage
commands you can use to secure incoming and outgoing connections for a router in your router network.
For more information about the attributes you can use with these commands, see router and listener in the qdrouterd.conf
man page.
|
Note
|
The commands in this table demonstrate operations on the local router listening on localhost and the default AMQP port (5672). If you want to perform an operation on a different router in the router network, you must specify the necessary connection options. For more information, see Connection Options in the qdmanage man page. |
| To… | Use this command… |
|---|---|
Set up SASL for the router |
qdmanage update --type=router --saslConfigDir=PATH --saslConfigName=NAME |
Add SASL authentication to an incoming connection |
qdmanage update --name=LISTENER_NAME --authenticatePeer=yes --saslMechanisms=MECHANISMS |
Change SASL mechanisms for an incoming connection |
qdmanage update --name=LISTENER_NAME --saslMechanisms=MECHANISMS |
Add SASL authentication to an outgoing connection |
qdmanage update --name=CONNECTOR_NAME --saslMechanisms=MECHANISMS --saslUsername=USERNAME --saslPassword=PASSWORD |
Change SASL mechanisms for an outgoing connection |
qdmanage update --name=CONNECTOR_NAME --saslMechanisms=MECHANISMS |
Add SASL payload encryption to an incoming connection |
qdmanage update --name=LISTENER_NAME --requireEncryption=yes --saslMechanisms=MECHANISMS |
Change SASL mechanisms for an incoming connection |
qdmanage update --name=LISTENER_NAME --saslMechanisms=MECHANISMS |
Remove SASL payload encryption from an incoming connection |
qdmanage update --name=LISTENER_NAME --requireEncryption=no --saslMechanisms |
Delete a SASL configuration |
qdmanage update --type=router --saslConfigDir --saslConfigName |
Dispatch Router supports both message routing and link routing for distributing messages between senders and receivers. You can use qdmanage
to view how addresses and link routes are configured in your environment, and define how a router should distribute messages.
Message routing involves configuring addresses to define how Dispatch Router should distribute messages. The following table lists the common qdmanage
commands you can use to configure addresses for a router in your router network.
For more information about the attributes you can use with these commands, see address and autolink in the qdrouterd.conf
man page.
|
Note
|
The commands in this table demonstrate operations on the local router listening on localhost and the default AMQP port (5672). If you want to perform an operation on a different router in the router network, you must specify the necessary connection options. For more information, see Connection Options in the qdmanage man page. |
| To… | Use this command… |
|---|---|
View addresses |
qdmanage query --type=address qdmanage read --name=ADDRESS_NAME |
View address distribution patterns |
qdmanage query prefix distribution --type=address |
View waypoints to broker queues |
qdmanage query prefix --type=address --waypoint=yes |
View autolinks |
qdmanage query --type=autolink |
Set a distribution pattern for an address |
qdmanage create --type=address --prefix=ADDRESS_PREFIX --distribution=DISTRIBUTION_PATTERN ... |
Set distribution patterns for multiple addresses |
These commands configure two addresses. |
Connect an address to a broker queue |
|
Update an address configuration |
qdmanage update --name=ADDRESS_NAME --ATTRIBUTE=VALUE ... |
Update an autolink |
qdmanage update --name=AUTOLINK_NAME --ATTRIBUTE=VALUE ... |
Delete an address configuration |
qdmanage delete --name=ADDRESS_NAME |
Delete an autolink |
qdmanage delete --name=AUTOLINK_NAME |
A link route is a chain of links between a sender and receiver that provides a private messaging path. The following table lists the common qdmanage
commands you can use to view, create, update, and delete link routes.
For more information about the attributes you can use with these commands, see the linkRoute in the qdrouterd.conf
man page.
|
Note
|
The commands in this table demonstrate operations on the local router listening on localhost and the default AMQP port (5672). If you want to perform an operation on a different router in the router network, you must specify the necessary connection options. For more information, see Connection Options in the qdmanage man page. |
| To… | Use this command… |
|---|---|
View link routes |
qdmanage query --type=linkRoute qdmanage read --name=LINK_ROUTE_NAME |
Create a link route |
|
Update a link route |
qdmanage update --name=LINK_ROUTE_NAME --ATTRIBUTE=VALUE ... |
Delete a link route |
qdmanage delete --name=INCOMING_LINK_ROUTE_NAME qdmanage delete --name=OUTGOING_LINK_ROUTE_NAME |
Dispatch Router logs are broken into different categories called logging modules. Each module provides important information about a particular aspect of a router. The following table lists the common qdmanage
commands you can use to view and change the configuration of a logging module.
For more information about the attributes you can use with these commands, see log in the qdrouterd.conf
man page.
|
Note
|
The commands in this table demonstrate operations on the local router listening on localhost and the default AMQP port (5672). If you want to perform an operation on a different router in the router network, you must specify the necessary connection options. For more information, see Connection Options in the qdmanage man page. |
| To… | Use this command… |
|---|---|
View the logging configuration |
qdmanage query --type=log |
View the logging configuration for a logging module |
qdmanage read --type=log --module=LOGGING_MODULE_NAME |
Set the default logging configuration |
qdmanage create --type=log --module=DEFAULT --enable=LOGGING_LEVEL --includeTimestamp=yes --ATTRIBUTE=VALUE |
Enable logging for a logging module |
qdmanage create --type=log --module=LOGGING_MODULE_NAME --enable=LOGGING_LEVEL --ATTRIBUTE=VALUE ... |
Change the logging configuration for a logging module |
qdmanage update --type=log --module=LOGGING_MODULE_NAME --ATTRIBUTE=VALUE ... |
The Dispatch Router management schema provides a set of management entities that you can use to configure and operate a router.
For details about the management entities, see Dispatch Router Management Schema.
In general, in a broker based architecture, the reliability feature is strictly related to the "store and forward" mechanism offered by each broker. Thanks to persistent journals, a broker can offer fault tolerance thus avoiding message loss; of course, it is not so true when messages are stored only in a volatile memory.
This is completely different using Dispatch Router, because each router neither takes ownership of messages nor stores them in a persistent storage. In this case, the reliability feature is offered by path redundancy which provides the possibility to reach the destination on different paths through the router network. In normal conditions, the best path is always chosen in terms of lowest cost but, when one or more routers go down, the topology is revisited by all remained routers and new paths are processed in order to reach always each destination. Of course, it means that the reliability is strictly related to the network topology the user chooses for his solution.
Because a solution based on Dispatch Router could be made not only by routers but by brokers too, the reliability is improved with persistent storage on them which add not only fault tolerance but temporal decoupling as well; without "store and forward" feature offered by brokers, the temporal decoupling is not possible only with routers and direct peers, both senders and receivers; the receiver must be online at same time of the sender in order to receive messages.
Offering path redundancy means designing the network topology in a way that even when one or more routers go down or even connections between them, each destination is always reachable following alternate paths through the routers that are still part of the network.
Consider the following simple scenario :
a network with three routers "Router.A", "Router.B" and "Router.C".
the "Router.A" is connected to both "Router.B" and "Router.C".
the "Router.C is connected to the "Router.B".
all three routers listen for client connections.
a sender client connects to the "Router.A" in order to send messages to a receiver client.
a receiver client connects to the "Router.B" initially in order to receive messages from the sender peer.
The "Router.A" configuration is something like following.
router { mode: interior id: Router.A } listener { host: <IP_ADDRESS> port: 6000 authenticatePeer: no } connector { name: INTER_ROUTER_B addr: <IP_ADDRESS> port: 5001 role: inter-router } connector { name: INTER_ROUTER_C addr: <IP_ADDRESS> port: 5002 role: inter-router }
There is only one listener in order to accept client connections and two connector entities for connecting to the other two routers.
The "Router.B" configuration is the following.
router { mode: interior id: Router.B } listener { addr: <IP_ADDRESS> port: 5001 authenticatePeer: no role: inter-router } listener { host: <IP_ADDRESS> port: 6001 authenticatePeer: no }
It has two listener entities in order to listen for connections from clients and from other routers in the network (in this case from the "Router.A" and "Router.C").
Finally, quite similar is the "Router.C" configuration.
router { mode: interior id: Router.C } listener { addr: <IP_ADDRESS> port: 5002 authenticatePeer: no role: inter-router } listener { host: <IP_ADDRESS> port: 6002 authenticatePeer: no } connector { name: INTER_ROUTER_B addr: <IP_ADDRESS> port: 5001 role: inter-router }
It has two listener entities in order to listen for connections from clients and from other routers in the network (in this case from the "Router.A") and finally it has a connector (for connecting to the "Router.B")
Consider a sender client connected to "Router.A" and attached to my_address
address which start to send messages (that is, 10 messages) and a receiver client connected to the "Router.B" and attached to the same address.
Starting the receiver, it waits for messages with no output on the console.
$ sudo python simple_recv.py -a localhost:6001/my_queue -m 10
Starting the sender, all the messages flow through "Router.A" and "Router.B" reaching the receiver; at this point the messages are all confirmed at sender side.
$ sudo python simple_send.py -a localhost:6001/my_queue -m 10 all messages confirmed
At same time, the receivers shows the messages received through the "Router.B".
{u'sequence': 1L} {u'sequence': 2L} {u'sequence': 3L} {u'sequence': 4L} {u'sequence': 5L} {u'sequence': 6L} {u'sequence': 7L} {u'sequence': 8L} {u'sequence': 9L} {u'sequence': 10L}
The path redundancy is provided by the other available path through the "Router.A", "Router.C" and then "Router.B". It means that if the connection between "Router.A" and "Router.B" goes down, the alternative path is used to reach the receiver.
Now, consider a fault on the "Router.B"; the receiver is not reachable anymore on that path but it can connect to the "Router.C" in order to continue to receive messages from the sender which does not know what’s happened and it can continue to send messages to the "Router.A" in order to reach the receiver.
The receiver is still reachable in order to get messages from the sender as displayed in the console output.
$ sudo python simple_recv.py -a localhost:6002/my_queue -m 10 {u'sequence': 1L} {u'sequence': 2L} {u'sequence': 3L} {u'sequence': 4L} {u'sequence': 5L} {u'sequence': 6L} {u'sequence': 7L} {u'sequence': 8L} {u'sequence': 9L} {u'sequence': 10L}
In order to have temporal decoupling in a solution based on Dispatch Router, adding one or more brokers is a must for its "store and forward" feature. Choosing the right topology, it is possible to have a solution which offers reliability with both path redundancy and permanent storing for messages.
Consider the following simple scenario :
a network with three routers "Router.A", "Router.B" and "Router.C" and finally a broker.
the "Router.A" is connected to both "Router.B" and "Router.C".
initially only the "Router.B" is connected to the broker.
all three routers listen for client connections.
a sender client connects to the "Router.A" in order to send messages to a queue in the broker.
a receiver client connects to the "Router.A" in order to get messages from the queue in the broker.
The receiver client can be offline when the sender starts to send messages because they’ll be stored into the queue permanently; coming back online, the receiver can get messages from the queue itself without message loss.
The "Router.A" configuration is something like following.
router { mode: interior id: Router.A } listener { host: <IP_ADDRESS> port: 6000 authenticatePeer: no } connector { name: INTER_ROUTER_B addr: <IP_ADDRESS> port: 5001 role: inter-router } connector { name: INTER_ROUTER_C addr: <IP_ADDRESS> port: 5002 role: inter-router } address { prefix: my_queue waypoint: yes }
It has a listener for accepting incoming connections from clients and two connector entities in order to connect to the other routers. The queue named my_queue
on the broker is exposed by a waypoint.
The "Router.B" configuration is the following.
router { mode: interior id: Router.B } listener { addr: <IP_ADDRESS> port: 5001 authenticatePeer: no role: inter-router } listener { host: <IP_ADDRESS> port: 6001 authenticatePeer: no } connector { name: BROKER addr: <IP_ADDRESS> port: 5672 role: route-container } address { prefix: my_queue waypoint: yes } autoLink { addr: my_queue connection: BROKER direction: in } autoLink { addr: my_queue connection: BROKER direction: out }
It can accept incoming connections from clients and from other routers (in this case the "Router.A") and connects to the broker. The queue named my_queue
on the broker is exposed by a waypoint with the related auto-links in both directions in order to send and receive messages to/from the queue itself.
Finally, the simple "Router.C" configuration.
router { mode: interior id: Router.C } listener { addr: <IP_ADDRESS> port: 5002 authenticatePeer: no role: inter-router } listener { host: <IP_ADDRESS> port: 6002 authenticatePeer: no }
It can accept incoming connections from clients and from other routers (in this case the "Router.A"). Initially there is no connection between this router and the broker.
First of all, thanks to the broker and its "store and forward" feature, the sender can connect to the "Router.A" and start to send messages even if the receiver is not online in that moment. Using the Python sample from the Qpid Proton library, the console output is like following.
$ sudo python simple_send.py -a localhost:6000/my_queue -m 10 all messages confirmed
All messages are confirmed because they reached the queue inside the broker through "Router.A" and "Router.B"; it is confirmed using the qdstat
tool.
$ sudo qdstat -b localhost:6001 -a Router Addresses class addr phs distrib in-proc local remote cntnr in out thru to-proc from-proc ================================================================================================================= local $_management_internal closest 1 0 0 0 0 0 0 0 0 local $displayname closest 1 0 0 0 0 0 0 0 0 mobile $management 0 closest 1 0 0 0 1 0 0 1 0 local $management closest 1 0 0 0 0 0 0 0 0 router Router.A closest 0 0 1 0 0 0 6 0 6 router Router.C closest 0 0 1 0 0 0 4 0 4 mobile my_queue 1 balanced 0 0 0 0 0 0 0 0 0 mobile my_queue 0 balanced 0 1 0 0 0 10 0 0 0 local qdhello flood 1 1 0 0 0 0 0 97 117 local qdrouter flood 1 0 0 0 0 0 0 7 0 topo qdrouter flood 1 0 2 0 0 0 8 13 9 local qdrouter.ma multicast 1 0 0 0 0 0 0 2 0 topo qdrouter.ma multicast 1 0 2 0 0 0 0 0 1 local temp.7f2u0zv9_U6QC5e closest 0 1 0 0 0 0 0 0 0
For the "Router.B", there are 10 messages as output (from the router to the broker) on the my_queue
address.
Starting the receiver connected to the "Router.A", it gets all the available messages from the queue.
$ sudo python simple_recv.py -a localhost:6000/my_queue -m 10 {u'sequence': 1L} {u'sequence': 2L} {u'sequence': 3L} {u'sequence': 4L} {u'sequence': 5L} {u'sequence': 6L} {u'sequence': 7L} {u'sequence': 8L} {u'sequence': 9L} {u'sequence': 10L}
Using the qdstat
tool on the "Router.B" another time, the output is like following.
$ sudo qdstat -b localhost:6001 -a Router Addresses class addr phs distrib in-proc local remote cntnr in out thru to-proc from-proc ================================================================================================================= local $_management_internal closest 1 0 0 0 0 0 0 0 0 local $displayname closest 1 0 0 0 0 0 0 0 0 mobile $management 0 closest 1 0 0 0 2 0 0 2 0 local $management closest 1 0 0 0 0 0 0 0 0 router Router.A closest 0 0 1 0 0 0 6 0 6 router Router.C closest 0 0 1 0 0 0 4 0 4 mobile my_queue 1 balanced 0 0 0 0 10 0 10 0 0 mobile my_queue 0 balanced 0 1 0 0 0 10 0 0 0 local qdhello flood 1 1 0 0 0 0 0 156 182 local qdrouter flood 1 0 0 0 0 0 0 7 0 topo qdrouter flood 1 0 2 0 0 0 10 18 11 local qdrouter.ma multicast 1 0 0 0 0 0 0 2 0 topo qdrouter.ma multicast 1 0 2 0 0 0 0 2 1 local temp.Xov_ZUcyti3jjXY closest 0 1 0 0 0 0 0 0 0
For the "Router.B", there are 10 messages as input (from the broker to the router) on the my_queue
address.
Now, consider a fault on the "Router.B"; in this case the broker is not reachable but it is possible to set up path redundancy through the "Router.C".
Using the qdmanage
tool, it is possible to configure the waypoint on my_queue
address, the related auto-links in both directions and finally the connector instance in order to enable the connection to the broker.
$ sudo qdmanage -b localhost:6002 create --stdin [ { "type":"connector", "name":"BROKER", "port":5672, "role":"route-container" }, { "type":"address", "prefix":"my_queue", "waypoint":"yes" }, { "type":"autoLink", "addr":"my_queue", "connection":"BROKER", "direction":"in" }, { "type":"autoLink", "addr":"my_queue", "connection":"BROKER", "direction":"out" } ] [ { "verifyHostname": true, "stripAnnotations": "both", "name": "BROKER", "allowRedirect": true, "idleTimeoutSeconds": 16, "maxFrameSize": 65536, "host": "<IP_ADDRESS>", "cost": 1, "role": "route-container", "maxSessions": 32768, "type": "org.apache.qpid.dispatch.connector", "port": "5672", "identity": "connector/<IP_ADDRESS>:5672:BROKER", "addr": "<IP_ADDRESS>" }, { "name": null, "prefix": "my_queue", "ingressPhase": 0, "waypoint": false, "distribution": "balanced", "type": "org.apache.qpid.dispatch.router.config.address", "identity": "7", "egressPhase": 0 }, { "addr": "my_queue", "name": null, "linkRef": null, "type": "org.apache.qpid.dispatch.router.config.autoLink", "operStatus": "inactive", "connection": "BROKER", "direction": "in", "phase": 1, "lastError": null, "externalAddr": null, "identity": "8", "containerId": null }, { "addr": "my_queue", "name": null, "linkRef": null, "type": "org.apache.qpid.dispatch.router.config.autoLink", "operStatus": "inactive", "connection": "BROKER", "direction": "out", "phase": 0, "lastError": null, "externalAddr": null, "identity": "9", "containerId": null } ]
The "Router.C" configuration changes in the same way as "Router.B". It can accept incoming connections from clients and from other routers (in this case the "Router.A") and connects to the broker. The queue named my_queue
on the broker is exposed by a waypoint with the related auto-links in both directions in order to send and receive messages to/from the queue itself.
At this point, the sender can connect to the "Router.A" for sending messages to the queue in the broker thanks to the "Router.C".
$ sudo python simple_send.py -a localhost:6000/my_queue -m 10 all messages confirmed
All messages are confirmed because they reached the queue inside the broker through "Router.A" and "Router.C"; it is confirmed using the qdstat
tool.
$ sudo qdstat -b localhost:6002 -a Router Addresses class addr phs distrib in-proc local remote cntnr in out thru to-proc from-proc ================================================================================================================= local $_management_internal closest 1 0 0 0 0 0 0 1 1 local $displayname closest 1 0 0 0 0 0 0 0 0 mobile $management 0 closest 1 0 0 0 5 0 0 5 0 local $management closest 1 0 0 0 0 0 0 0 0 router Router.A closest 0 0 1 0 0 0 5 0 5 mobile my_queue 0 balanced 0 1 0 0 0 10 0 0 0 mobile my_queue 1 balanced 0 0 0 0 0 0 0 0 0 local qdhello flood 1 1 0 0 0 0 0 665 647 local qdrouter flood 1 0 0 0 0 0 0 8 0 topo qdrouter flood 1 0 1 0 0 0 31 52 32 local qdrouter.ma multicast 1 0 0 0 0 0 0 1 0 topo qdrouter.ma multicast 1 0 1 0 0 0 1 2 1 local temp.k6UMaS4P0JmtSlL closest 0 1 0 0 0 0 0 0 0
For the "Router.C", there are 10 messages as output (from the router to the broker) on the my_queue
address.
Starting the receiver connected to the "Router.A", it gets all the available messages from the queue.
$ sudo python simple_recv.py -a localhost:6000/my_queue -m 10 {u'sequence': 1L} {u'sequence': 2L} {u'sequence': 3L} {u'sequence': 4L} {u'sequence': 5L} {u'sequence': 6L} {u'sequence': 7L} {u'sequence': 8L} {u'sequence': 9L} {u'sequence': 10L}
Using the qdstat
tool on the "Router.C" another time, the output is like following.
$ sudo qdstat -b localhost:6002 -a Router Addresses class addr phs distrib in-proc local remote cntnr in out thru to-proc from-proc ================================================================================================================= local $_management_internal closest 1 0 0 0 0 0 0 1 1 local $displayname closest 1 0 0 0 0 0 0 0 0 mobile $management 0 closest 1 0 0 0 6 0 0 6 0 local $management closest 1 0 0 0 0 0 0 0 0 router Router.A closest 0 0 1 0 0 0 5 0 5 mobile my_queue 0 balanced 0 1 0 0 0 10 0 0 0 mobile my_queue 1 balanced 0 0 0 0 10 0 10 0 0 local qdhello flood 1 1 0 0 0 0 0 746 726 local qdrouter flood 1 0 0 0 0 0 0 8 0 topo qdrouter flood 1 0 1 0 0 0 34 55 35 local qdrouter.ma multicast 1 0 0 0 0 0 0 1 0 topo qdrouter.ma multicast 1 0 1 0 0 0 1 4 1 local temp.Hso3moy3l+Sn+Fy closest 0 1 0 0 0 0 0 0 0
For the "Router.C", there are 10 messages as input (from the broker to the router) on the my_queue
address.
Every broker has limits in terms of queue size but in order to overcome this problem, one possible solution is "sharding" queues : in that way a single queue is divided in more "shards" (chunks) each on a different broker. It means that such solution needs more than one broker instance in order to host a shard on each of them. Of course, a sender connected to one of these brokers can send messages to the shard hosted only on that broker. At same time, a receiver connected to a broker can get messages from the shard that is hosted on that broker and can not see available messages in the shards hosted on the other brokers, even if they are all parts of the same queue.
|
Note
|
Even if speaking about shards it is obvious that they are real queues all with same name but on different brokers. The "shard" concept is an abstract one because finally a shard is a real queue stored on a broker. |
The big problem in this scenario, designed only with brokers, is that a receiver can be stucked on an empty shard without reading any messages while the shards on the other brokers have messages to deliver. it is a real problem because the receiver is interested in receiving messages from the whole queue and it does not take care if it is shared or not. Because of this problem, the receiver sees the queue as empty even if it is not so true due to the sharding and the messages available on the other shards.
The above problem can be solved adding a Dispatch Router instance in the network in front of the brokers and leverage on its waypoint feature with related auto-links.
Consider the following simple scenario :
a network with one router "Router.A" and two brokers.
the "Router.A" listens for clients connections and it is connected to both brokers.
the brokers host shards for a queue; each broker has one shard.
a sender client connects to the "Router.A" in order to send messages to the queue.
a receiver client connects to the "Router.A" in order to get messages from the queue.
With such solution and connecting to the "Router.A", sender and receiver do not know anything about sharding; they want send and receive messages to/from the whole queue that is the only thing they are aware of. They are both connected to the router and see only one address (related to the queue).
The "Router.A" configuration is something like following.
router { mode: standalone id: Router.A } listener { host: <IP_ADDRESS> port: 6000 authenticatePeer: no } connector { name: BROKER1 addr: <IP_ADDRESS> port: 5672 role: route-container } connector { name: BROKER2 addr: <IP_ADDRESS> port: 5673 role: route-container } address { prefix: my_queue waypoint: yes } autoLink { addr: my_queue connection: BROKER1 direction: in } autoLink { addr: my_queue connection: BROKER1 direction: out } autoLink { addr: my_queue connection: BROKER2 direction: in } autoLink { addr: my_queue connection: BROKER2 direction: out }
The router has a listener for incoming connection from clients and two connector instances in order to connect to both brokers. The whole queue is named my_queue
hosted in terms of shards on both brokers and the router is configured with a waypoint for that address. Finally, there are two auto-links in both directions for that queue on both brokers.
Using the Python sample from the Qpid Proton library, the sender can connect to the "Router.A" and start to send messages to the queue; the console output is like following.
$ sudo python simple_send.py -a localhost:6000/my_queue -m 10 all messages confirmed
All messages are confirmed because they reached the queue and, thanks to the default balanced
distribution on the address, the messages are delivered to both shards on the brokers (5 messages per shard). Using the qdstat
tool on the router, the distribution is clear.
$ sudo qdstat -b localhost:6000 -l Router Links type dir conn id id peer class addr phs cap undel unsettled deliveries admin oper ======================================================================================================================= endpoint in 1 6 mobile my_queue 1 250 0 0 0 enabled up endpoint out 1 7 mobile my_queue 0 250 0 0 5 enabled up endpoint in 2 8 mobile my_queue 1 250 0 0 0 enabled up endpoint out 2 9 mobile my_queue 0 250 0 0 5 enabled up endpoint in 8 19 mobile $management 0 250 0 0 1 enabled up endpoint out 8 20 local temp.qCGHruCa4UIvYrS 250 0 0 0 enabled up
There are the out
links (from router to brokers) for the my_queue
address (id values 7
and 9
) which have each 5 deliveries. It shows messages distributed across brokers and related shards for the queue; it is confirmed by the different connections they are tied (conn id values 1
and 2
).
Starting the receiver connected to the "Router.A", it gets all the available messages from the queue.
$ sudo python simple_recv.py -a localhost:6000/my_queue -m 10 {u'sequence': 1L} {u'sequence': 2L} {u'sequence': 3L} {u'sequence': 4L} {u'sequence': 5L} {u'sequence': 6L} {u'sequence': 7L} {u'sequence': 8L} {u'sequence': 9L} {u'sequence': 10L}
As for the sender, they are received through both the brokers and related shards. it is confirmed using the qdstat
tool.
$ sudo qdstat -b localhost:6000 -l Router Links type dir conn id id peer class addr phs cap undel unsettled deliveries admin oper ======================================================================================================================= endpoint in 1 6 mobile my_queue 1 250 0 0 5 enabled up endpoint out 1 7 mobile my_queue 0 250 0 0 5 enabled up endpoint in 2 8 mobile my_queue 1 250 0 0 5 enabled up endpoint out 2 9 mobile my_queue 0 250 0 0 5 enabled up endpoint in 10 22 mobile $management 0 250 0 0 1 enabled up endpoint out 10 23 local temp.HT+f3ZilGP5o3wo 250 0 0 0 enabled up
There are the in
links (from brokers to router) for the my_queue
address (id values 6
and 8
) which have each 5 deliveries. It shows messages distributed across brokers and related shards for the queue; it is confirmed by the different connections they are tied (conn id values 1
and 2
).
One disadvantage of sharded queues is that the receiver might receive messages "out of order" even with very good performance.
Dispatch Router should, in theory, work with any client that is compatible with AMQP 1.0. The following clients have been tested:
| Client | Notes |
|---|---|
qpid::messaging |
The Qpid messaging clients work with Dispatch Router as long as they are configured to use the 1.0 version of the protocol. To enable AMQP 1.0 in the C++ client, use the \{protocol:amqp1.0} connection option. |
Proton Reactor |
The Proton Reactor API is compatible with Dispatch Router. |
Proton Messenger |
Messenger works with Dispatch Router. |
Dispatch Router is an AMQP router and as such, it provides extensions, code-points, and semantics for routing over AMQP. This page documents the details of Dispatch Router’s use of AMQP.
The following Message Annotation fields are defined by Dispatch Router:
| Field | Type | Description |
|---|---|---|
x-opt-qd.ingress |
string |
The identity of the ingress router for a message-routed message. The ingress router is the first router encountered by a transiting message. The router will, if this field is present, leave it unaltered. If the field is not present, the router shall insert the field with its own identity. |
x-opt-qd.trace |
list of string |
The list of routers through which this message-routed message has transited. If this field is not present, the router shall do nothing. If the field is present, the router shall append its own identity to the end of the list. |
x-opt-qd.to |
string |
To-Override for message-routed messages. If this field is present, the address in this field shall be used for routing in lieu of the to field in the message properties. A router may append, remove, or modify this annotation field depending on the policy in place for routing the message. |
x-opt-qd.phase |
integer |
The address-phase, if not zero, for messages flowing between routers. |
The following Capability values are used in Sources and Targets.
| Capability | Description |
|---|---|
qd.router |
This capability is added to sources and targets that are used for inter-router message exchange. This capability denotes a link used for router-control messages flowing between routers. |
qd.router-data |
This capability is added to sources and targets that are used for inter-router message exchange. This capability denotes a link used for user messages being message-routed across an inter-router connection. |
The following dynamic-node-properties are used by Dispatch Router in Sources.
| Property | Description |
|---|---|
x-opt-qd.address |
The node address describing the destination desired for a dynamic source. If this is absent, the router will terminate any dynamic receivers. If this address is present, the router will use the address to route the dynamic link attach to the proper destination container. |
The following AMQP addresses and address patterns are used within Dispatch Router.
| Pattern | Description |
|---|---|
|
An address that references a locally attached endpoint. Messages using this address pattern shall not be routed over more than one link. |
|
An address that references an endpoint attached to a specific router node in the network topology. Messages with addresses that follow this pattern shall be routed along the shortest path to the specified router. Note that addresses of this form are a-priori routable in that the address itself contains enough information to route the message to its destination. The |
|
A mobile address. An address of this format represents an endpoint or a set of distinct endpoints that are attached to the network in arbitrary locations. It is the responsibility of the router network to determine which router nodes are valid destinations for mobile addresses. |
| Address | Description |
|---|---|
|
The management agent on the attached router/container. This address would be used by an endpoint that is a management client/console/tool wishing to access management data from the attached container. |
|
The management agent at Router.E in area 0. This address would be used by a management client wishing to access management data from a specific container that is reachable within the network. |
|
The router entity in each of the connected routers.
This address is used to communicate with neighbor routers and is
exclusively for the |
|
The router entity in each of the connected routers. This address is used by a router to communicate with other routers in the network. |
|
The router entity at the specifically indicated router. This address form is used by a router to communicate with a specific router that may or may not be a neighbor. |
Dispatch Router is manageable remotely via AMQP. It is compliant with the emerging AMQP Management specification (draft 9).
Differences from the specification:
The name
attribute is not required when an entity is created. If
not supplied it will be set to the same value as the system-generated
"identity" attribute. Otherwise it is treated as per the standard.
The REGISTER
and DEREGISTER
operations are not implemented. The router
automatically discovers peer routers via the router network and makes
their management addresses available via the standard GET-MGMT-NODES
operation.
Dispatch Router uses the Cyrus SASL library for SASL authentication. Therefore, if you want to use SASL, you must set up the Cyrus SASL database and configure it.
To generate a SASL database to store credentials, enter the following command:
$ sudo saslpasswd2 -c -f SASL_DATABASE_NAME.sasldb -u DOMAIN_NAME USER_NAME
This command creates or updates the specified SASL database, and adds the specified user name to it. The command also prompts you for the user name’s password.
The full user name is the user name you entered plus the domain name (USER_NAME
@DOMAIN_NAME
). Providing a domain name is not required when you add a user to the database, but if you do not provide one, a default domain will be added automatically (the hostname of the machine on which the tool is running). For example, in the command above, the full user name would be<EMAIL_ADDRESS>.
To view the user names stored in the SASL database:
$ sudo sasldblistusers2 -f qdrouterd.sasldb<EMAIL_ADDRESS>PASSWORD<EMAIL_ADDRESS>PASSWORD
To use the SASL database to provide authentication in Dispatch Router:
Open the /etc/sasl2/qdrouterd.conf
configuration file.
Set the following attributes:
pwcheck_method: auxprop auxprop_plugin: sasldb sasldb_path: SASL_DATABASE_NAME mech_list: MECHANISM1 ...
sasldb_path
The name of the SASL database to use.
For example:
sasldb_path: qdrouterd.sasldb
mech_list
The SASL mechanisms to enable for authentication. To add multiple mechanisms, separate each entry with a space.
For example:
mech_list: ANONYMOUS DIGEST-MD5 EXTERNAL PLAIN
Revised on 2018-04-28 07:00:48 PDT
Apache Qpid, Messaging built on AMQP; Copyright © 2015 The Apache Software Foundation; Licensed under the Apache License, Version 2.0; Apache Qpid, Qpid, Qpid Proton, Proton, Apache, the Apache feather logo, and the Apache Qpid project logo are trademarks of The Apache Software Foundation; All other marks mentioned may be trademarks or registered trademarks of their respective owners


@* * Copyright 2021 HM Revenue & Customs * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *@ @this() @(form: Form[_], fieldName: String, labelKeyPrefix: String, hintKeySuffix: Option[String] = None )(implicit request: Request[_], messages: Messages) @dateErrors = @{ form(fieldName).errors }


A madperson, in our beloved WDI-19 Class, has found a way to affect the past and has gone back in time to make sure Naruto was never born! Who would do such a thing??
Once you start, you'll only have 4 minutes worth of time to guess the individual's name before Naruto fades out of existence FOREVER!! Hurry, his clock is ticking...!
Letters to Choose:


Functions | |
| bool | sendModifiedMap (nav_msgs::GetMap::Request &req, nav_msgs::GetMap::Response &res) |
| Sends the received map. More... | |
| void | mapCallback (const nav_msgs::OccupancyGrid &map_input) |
| Callback for map subscription. More... | |
| void | initialize (ros::NodeHandle &n) |
| Initializes the given nodehandle. More... | |
Variables | |
| bool | map_received |
| ros::ServiceServer | service |
| ros::Subscriber | map_sub |
| nav_msgs::OccupancyGrid | new_map_occ_grid |
| void staticMapService::initialize | ( | ros::NodeHandle & | n | ) |
Initializes the given nodehandle.
Initializes the given nodehandle n.
| n | |
| n | { parameter_description } |
Definition at line 43 of file no_entry_service.cpp.
| void staticMapService::mapCallback | ( | const nav_msgs::OccupancyGrid & | map_input | ) |
Callback for map subscription.
Receives map from map_server and makes two copies.
| [in] | map_input | The map input |
Definition at line 31 of file no_entry_service.cpp.
| bool staticMapService::sendModifiedMap | ( | nav_msgs::GetMap::Request & | req, |
| nav_msgs::GetMap::Response & | res | ||
| ) |
Sends the received map.
Sends a modified map for /static_map request.
| req | The getMap request |
| res | The map response |
| req | The request |
| res | The response map |
Definition at line 12 of file no_entry_service.cpp.
| bool staticMapService::map_received |
If map_received, true
Definition at line 104 of file no_entry_layer_node.h.
| ros::Subscriber staticMapService::map_sub |
Subscriber for modified map
Definition at line 112 of file no_entry_layer_node.h.
| nav_msgs::OccupancyGrid staticMapService::new_map_occ_grid |
Occupancy grid to store the map
Definition at line 116 of file no_entry_layer_node.h.
| ros::ServiceServer staticMapService::service |
Server for /static_map service
Definition at line 108 of file no_entry_layer_node.h.


Link with href
Button with data-target
...Here is collapsed part!Yes, It is shown!
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INEC declares Kogi West Senatorial rerun inconclusive
By James Azania, Lokoja
The Independent National Electoral Commission (INEC) is to announce the date for the supplementary in Saturday’s Kogi West Senatorial District rerun.
While Senator Smart Adeyemi of the All Progressives Congress (APC) has 80,118, Senator Dino Melaye of the Peoples Democratic Party (PDP) polled 59,548, a winner has yet to be declared.
The Returning Officer (RO), Prof. Olayide Lawal declared the Kogi West Senatorial election as inconclusive and that supplementary election will be conducted.
Affected are 53 polling units and 46,127 registered voters, as INEC decide on the new date for the supplementary poll.
Below is a breakdown of how both parties performed in the seven LGA’s
Kabba/Bunu LGA
APC-15,037
PDP-8,974
Ijumu LGA
APC-11,627
PDP-7,647
Kogi/Koton Karfe LGA
APC-14,168
PDP-9,786
Mapo/Muro LGA
APC-4,874
PDP-3,704
Yagba East LGA
APC-6,683
PDP-7,745
Yagba West LGA
APC-7,941
PDP-8,980
Lokoja LGA
APC-19,788
PDP-12,712


The Indian Air Force (IAF) is the air arm of the Indian Armed Forces. Its complement of personnel and aircraft assets ranks fourth amongst the air forces of the world. Its primary mission is to secure Indian airspace and to conduct aerial warfare during armed conflict. It was officially established on 8 October 1932 as an auxiliary air force of the British Empire which honoured India's aviation service during World War II with the prefix Royal. After India gained independence from the United Kingdom in 1947, the name Royal Indian Air Force was kept and served in the name of Dominion of India. With the government's transition to a Republic in 1950, the prefix Royal was removed.
Since 1950 the IAF has been involved in four wars with neighbouring Pakistan and one with the People's Republic of China. Other major operations undertaken by the IAF include Operation Vijay, Operation Meghdoot, Operation Cactus and Operation Poomalai. The IAF's mission expands beyond engagement with hostile forces, with the IAF participating in United Nations peacekeeping missions.
IAF today is the fourth largest air force in the world. It is among the world’s top ten countries in terms of defense expenditure and third-largest importer of defense hardware. IAF is focusing on the procurement of long range, lethal and precision guided munitions, reconnaissance, surveillance and target acquisition system.
Crests have been used for the purpose of recognition and distinguishing formations or Units. They are symbols and source of inspiration and encouragement for the soldiers. The Air Force has adopted various crests for the commands, Squardron and the other establishments. The Crests in the Indian Air Force comprises of a standard frame. The central portion of the frame contains the individual formation sign with a motto shown in the scroll at the foot of the frame. The unit sign is drawn inside a circle of 3 inches diameter. The name of the formation of the units is shown in the upper half of the circle while Bhartiya Vayu Sena inscribed in the lower half. The crest and the motto are designed based on the role of the formation. The Crest is approved by the President of India and is of great historical and sentimental value. The Crest is normally presented by the AOsC-in-C at ceremonial parades. The importance of the crest can be understood from the fact that the movement of the crest from one place to other is done only by hand of an officer.
The Motto of Indian Air Force has been taken from eleventh chapter of the Gita, the Discourse given by Lord Krishna to Arjuna on the battlefield of Kurukshetra during the Great War of Mahabharata. The Lord is showing His Supreme Divine form to Arjuna and the great form of the Lord is reaching the sky with glory, evoking fear and loss of self-control in the mind of Arjuna. The Indian Air Force, similarly, aims to overwhelm the adversaries with application of aerospace power in defence of the nation.
The Air Force ensign, different from the Air Force Colours, is blue in colour, containing the National Flag in the first quadrant and a roundel consisting of the colours of the National Flag i.e. saffron, white and green in the centre. This ensign was adopted in 1951 .
Marshal of the Indian Air Force Arjan Singh DFC, known for his Professional Competence, Leadership and Strategic vision, is a colossus in the IAF.
Arjan Singh was born on 15 April 1919 and since his early days as a student, he has been an achiever. An ace swimmer, he held an all-India record in free style swimming in one mile and half mile events. Arjan Singh was 19 years of age when he was selected for training at RAF Cranwell in 1938. He topped the course among his batch of Indian Cadets He was the vice captain of swimming, athletics and hockey teams during his training at Royal Air Force College Cranwell.
For displaying outstanding leadership, great skill and courage in Burma Campaign during World War II. He was awarded the Distinguished Flying Cross (DFC) in 1944.
Beginning Aug 1945, Wg Cdr Arjan Singh was selected to undergo the RAF Staff college at Bracknell in the UK.
On 15 Aug 1947, he had the unique honour of leading the flypast of over a hundred IAF aircraft over the Red Fort and on the same day, he assumed the command of Air Force Station, Ambala in the rank of Group Captain.
In addition to the high standards of Arjan Singh set in flying and training, he stabilised the administration, with a fair hand and enabled it to recover from the triple shock of demobilisation, partition of the country and the Air Force, and communal riots of unprecedented scale.
In 1949, Air Commodore Arjan Singh took over as the Air Officer Commanding of Operational command, which later came to be known as Western Air Command. Arjan Singh had the distinction of having the longest tenure as the AOC of Operation Command, from 1949-1952 and again from 1957-1961. Promoted to Air Vice Marshal, he was the AOC-in-C of Operation command. Towards the end of the 1962 war, he was appointed the DCAS and became the VCAS in 1963. He was the overall commander of the joint air training exercises “Shiksha” held between the IAF, RAF and RAAF thus laying the foundation of acquisition of new RADAR systems for IAF and training of IAF officers in USA for advanced gunnery course. He was also instrumental in planning and setting up of Armament Training Wing at Jamnagar, and later the Air Force Academy in 1967.
As Chief of Air Staff, Air Marshal Arjan Singh led the IAF in the 1965 War against Pakistan, wherein the IAF was able to blunt the Pakistani armoured thrust at Chamb, gained air superiority over the PAF and helped the Indian Army score Strategic victories.
Arjan Singh was awarded the Padma Vibhushan for leading Indian Air Force during 1965 war. Subsequently, in recognition of the Air Force’s contribution in the war, the rank of CAS was upgraded to that of Air Chief Marshal and Arjan Singh became the first Air Chief Marshal of the Indian Air Force. On completion of five years as the Chief of the Air Staff in two ranks, Arjan Singh retired on 16 Jul 1969.
In his career, Arjan Singh flew more than 60 different types of aircraft ranging from Pre World War II era bi planes to the supersonic MIG-21. He flew his first solo on MIG-21 as Chief of the Air Staff and remained a flyer to the end of his tenure in the IAF, visiting forward squadrons & units and flying with them.
In 1971, Arjan Singh was appointed as India’s Ambassador to Switzerland. Three years later, he was appointed as the country’s High Commissioner to Kenya. He also served as a member of the minorities commission in 1978 and later, as the Chairman of Indian Institute of Technology in New Delhi, an Institute of great repute, which he served with great distinction till 1983. In 1989, he was appointed the Lt Governor of Delhi.
Arjan Singh has remained a source of inspiration to fellow Indians and Officers. His simple formula for success is summed up in a few words by him.
Firstly, you should be thorough in your profession of everyone;
Secondly, complete the job at hand to the satisfaction of everyone;
Thirdly, you must have implicit faith in your subordinates;
And fourthly, your efforts should always be honest and sincere.
YB Chavan, Defence minister of India during the 1965 war described him as the jewel of a person, quietly efficient and firm, unexcitable but a very able leader.
After retiring from the IAF, Arjan Singh remained active and supportive of various causes for the welfare of air force veterans. Towards this end, he set up a trust in 2004 by contributing Twenty million rupees from his personal wealth to it.
On 17 April 2007, Dr Manmohan Singh, Prime Minister of India, wrote to Arjan Singh and honoured him as Marshal of the IAF and mentioned that the nation looked up to him as a source of continuing inspiration, wisdom and strength to the Indian Armed Forces.
Marshal of the IAF Arjan Singh passed away on 16 Sep 2017. His dynamic personality, professional competence, honesty of purpose in his service to the IAF and the country truly sets him apart as a leader and an icon of the Indian Air Force.
Air Chief Marshal Rakesh Kumar Singh Bhadauria PVSM AVSM VM ADC took over as the Chief of the Air Staff on 30 September 2019. An alumnus of the prestigious National Defence Academy, he graduated from the Air Force Academy with the coveted ‘Sword of Honour’ and was commissioned in the fighter stream of Indian Air Force on 15 June 1980.
He has over 4270 hours of experience on twenty seven types of fighters as well as transport aircraft and holds the unique distinction of being an Experimental Test Pilot, a Cat 'A' Qualified Flying Instructor and a Pilot Attack Instructor. He completed his Masters in Defence Studies from Command and Staff College, Bangladesh.
During his illustrious career, spanning almost four decades, the Air Chief Marshal has held a number of significant field and staff appointments which include Command of a front line Jaguar Squadron, Command of a premier Air Force Station in South-Western sector, Commanding Officer of Flight Test Squadron at Aircraft & System Testing Establishment and Chief Test Pilot as well as Project Director of National Flight Test Centre on Tejas Light Combat Aircraft (LCA) project. He was extensively involved in the initial prototype flight testing on the LCA. He has tenanted the appointments of Air Attaché Moscow, Assistant Chief of the Air Staff (Projects), Commandant National Defence Academy, Senior Air Staff Officer at Central Air Command, Deputy Chief of the Air Staff, Air Officer Commanding-in-Chief of Southern Air Command and Air Officer Commanding-in-Chief of Training Command. Prior to taking over as the Chief of the Air Staff, he held the appointment of the Vice Chief of the Air Staff.
In recognition of his meritorious service the Air Chief Marshal has been awarded the Vayu Sena Medal (VM) in 2002, Ati Vishist Seva Medal (AVSM) in 2013 and Param Vishist Seva Medal (PVSM) in 2018. He was appointed as Principal Honorary ADC to the President of India on 01 October 2019.
He is married to Mrs Asha Bhadauria and the couple is blessed with a daughter Sonali and a son Saurav.


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A TypeScript definition for the package descriptor file.
Package author information. An author is one person.
your-name <account@your-domain> (http://your-url)
An executable file which will be installed into the PATH
with a package install. npm
will symlink that file into
prefix/bin
for global installs, or ./node_modules/.bin/
for local installs.
{
"bin" : {
"myapp" : "./cli.js"
}
}
For example, with linux if you install myapp
,
it'll create a symlink from the cli.js
script
to /usr/local/bin/myapp
.
This is a hint to the module which is meant to be used "client-side" instead of "nodejs".
The url to your project's issue tracker and (or) the email address to which issues should be reported. These are helpful for people who encounter issues with your package.
Bundled dependencies are an array of package names that will be bundled together when publishing your package.
A "config
" object can be used to set configuration parameters
used in package scripts that persist across upgrades.
For instance, if a package had the following:
{
"config" : {
"port" : "8080"
}
}
and then had a "start
" command that then referenced the
npm_package_config_port environment variable,
then the user could override that by doing npm config set foo:port 8001.
If there is an AUTHORS
file in the root of your package,
npm will treat each line as a Name
If your code only runs on certain cpu architectures, you can specify which ones.
This checks against process.arch
.
Dependencies are specified in a simple object that maps a package name to a version range. The version range is a string which has one or more space-separated descriptors. Dependencies can also be identified with a tarball or git URL.
A brief description of the package. By convention, the first sentence (up to the first ". ") should be usable as a package title in listings.
If someone is planning on downloading and using your module in their program, then they probably don't want or need to download and build the external test or documentation framework that you use. In this case, it's best to map these additional items in a devDependencies object.
You can specify exact locations to put binary files, man pages, documentation, examples, etc. Package manager tools must use these directory definitions to find various package components.
{
"directories": {
"lib": "path/to/lib/",
"bin": "path/to/bin/",
"man": "path/to/man/",
"doc": "path/to/doc/",
"example": "path/to/example/"
}
}
You can specify the version of node that your stuff works on.
You can also specify which versions of npm
are capable
of properly installing your program.
Files that are included in your project described
as a glob pattern. Omitting the field will make it default
to ["*"]
, as it will include all files.
If your package only allows one version of a given dependency,
and you'd like to enforce the same behavior as yarn install --flat
on the command line, set this to true.
The url to the project homepage.
An array of string keywords to assist users searching for the package in catalogs.
A license for your package so that people know how they are permitted
to use it, and any restrictions you're placing on it.
If you're using a common license such as BSD-2-Clause
or MIT
,
add a current SPDX license identifier.
The main field is a module ID that is the primary entry point to your package.
That is, if your package is named foo
, and a user installs it, and then
does require("foo")
, then your main module's exports object will be returned.
This should be a module ID relative to the root of your package folder.
For most modules, it makes the most sense to have a main script and often not much else.
A single file (or an array of filenames) for the man program.
The name of your package.
The name and version together should form a unique identifier accoss a project.
The name and version fields are optional if you don't want to publish your package.
A name can be optionally prefixed by a scope, e.g. @types/lodash
.
If a dependency can be used, but you would like npm to proceed
if it cannot be found or fails to install, then you may put it
in the optionalDependencies
object. This is a map of package name
to version or url, just like the dependencies
object.
The difference is that build failures do not cause installation to fail.
It is still your program's responsibility to handle the lack of the dependency.
You can specify which operating systems your module will run on
In some cases, you want to express the compatibility of your package with a host tool or library, while not necessarily doing a require of this host. This is usually referred to as a plugin. Notably, your module may be exposing a specific interface, expected and specified by the host documentation.
This option used to trigger an npm warning, but it will no longer warn.
It is purely there for informational purposes. It is now recommended
that you install any binaries as local devDependencies
wherever possible.
If you set "private
": true in your package.json
, then npm
will refuse to publish it.
This is a way to prevent accidental publication of private repositories.
If you would like to ensure that a given package is only ever published to
a specific registry (for example, an internal registry),
then use the publishConfig dictionary described below to override
the registry config param at publish-time.
This is a set of config values that will be used at publish-time.
It's especially handy if you want to set the tag
, registry
or access
,
so that you can ensure that a given package is not tagged with “latest”
,
published to the global public registry or that a scoped module is private by default.
Any config values can be overridden, but only "tag
", "registry
" and
"access
" probably matter for the purposes of publishing.
See npm-config to see the list of config options that can be overridden.
{
"publishConfig":{
"registry":"https://registry.npmjs.org"
}
}
{
"publishConfig":{
"registry":"http://your-registry.local"
}
}
Specify the place where your code lives. This is helpful for people who want to contribute.
{
"repository": {
"type": "git",
"url": "https://github.com/ajaxlab/package-json-type.git"
}
}
{
"repository": {
"type": "svn",
"url": "https://v8.googlecode.com/svn/trunk/"
}
}
{
"repository": {
"type": "git",
"url": "https://github.com/facebook/react.git",
"directory": "packages/react-dom"
}
}
Allows you to override a version of a particular nested dependency.
See the Selective Versions Resolutions RFC for the full spec.
Note that installing dependencies via [yarn install --flat]
will
automatically add a resolutions block to your package.json file.
The "scripts
" property is a dictionary containing script commands
that are run at various times in the lifecycle of your package.
The key is the lifecycle event, and the value is the command to run at that point.
{
"scripts": {
"install": "install.js",
"uninstall": "uninstall.js",
"build": "build.js",
"doc": "make-doc.js",
"test": "test.js",
}
}
Indicate the main declaration file in your package.json.
Set the types
property to point to your bundled declaration file.
{
"name": "some-package",
"version": "1.0.0",
"main": "./lib/main.js",
"types": "./lib/main.d.ts"
}
A version string conforming to the Semantic Versioning requirements.
Generated using TypeDoc
A TypeScript definition for the package descriptor file.
http://wiki.commonjs.org/wiki/Packages/1.0
https://docs.npmjs.com/files/package.json
https://yarnpkg.com/en/docs/package-json


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Methods for calculation and visualization of the Repertoire Dissimilarity Index. Citation: Bolen and Rubelt, et al (2017) <doi:10.1186/s12859-017-1556-5>.
| Version: | 1.0.0 |
| Depends: | R (≥ 3.0.0) |
| Imports: | beanplot, gplots, pdist, stringr |
| Suggests: | knitr, ggplot2 |
| Published: | 2018-05-07 |
| Author: | Christopher Bolen [aut, cre], Florian Rubelt [aut], Jason Vander Heiden [aut] |
| Maintainer: | Christopher Bolen <cbolen1 at gmail.com> |
| BugReports: | https://bitbucket.org/cbolen1/rdicore/issues |
| License: | CC BY-SA 4.0 |
| URL: | http://rdi.readthedocs.io |
| NeedsCompilation: | no |
| Citation: | rdi citation info |
| Materials: | README NEWS |
| CRAN checks: | rdi results |
| Reference manual: | rdi.pdf |
| Package source: | rdi_1.0.0.tar.gz |
| Windows binaries: | r-devel: rdi_1.0.0.zip, r-release: rdi_1.0.0.zip, r-oldrel: rdi_1.0.0.zip |
| OS X binaries: | r-release: rdi_1.0.0.tgz, r-oldrel: rdi_1.0.0.tgz |
Please use the canonical form https://CRAN.R-project.org/package=rdi to link to this page.