Composer Installation
Composer can be used in several ways to install CodeIgniter4 on your system.
Important
CodeIgniter4 requires Composer 2.0.14 or later.
Note
If you are not familiar with Composer, we recommend you read Basic usage first.
The first technique describes creating a skeleton project using CodeIgniter4, that you would then use as the base for a new webapp. The second technique described below lets you add CodeIgniter4 to an existing webapp,
Note
If you are using a Git repository to store your code, or for
collaboration with others, then the vendor folder would normally
be “git ignored”. In such a case, you will need to do a composer update
when you clone the repository to a new system.
App Starter
The CodeIgniter 4 app starter repository holds a skeleton application, with a composer dependency on the latest released version of the framework.
This installation technique would suit a developer who wishes to start a new CodeIgniter4 based project.
Installation
In the folder above your project root:
composer create-project codeigniter4/appstarter project-root
The command above will create a project-root folder.
If you omit the “project-root” argument, the command will create an “appstarter” folder, which can be renamed as appropriate.
Note
Before v4.4.0, CodeIgniter autoloader did not allow special
characters that are illegal in filenames on certain operating systems.
The symbols that can be used are /
, _
, .
, :
, \
and space.
So if you installed CodeIgniter under the folder that contains the special
characters like (
, )
, etc., CodeIgniter didn’t work. Since v4.4.0,
this restriction has been removed.
Important
When you deploy to your production server, don’t forget to run the following command:
composer install --no-dev
The above command will remove the Composer packages only for development that are not needed in the production environment. This will greatly reduce the vendor folder size.
Initial Configuration
After installation, a few initial configurations are required. See Initial Configuration for the details.
Upgrading
Whenever there is a new release, then from the command line in your project root:
composer update
Read the upgrade instructions, and check Breaking Changes and Enhancements.
Pros
Simple installation; easy to update.
Cons
You still need to check for file changes in the project space (root, app, public, writable) and merge them after updating.
Note
There are some third-party CodeIgniter modules available to assist with merging changes to the project space: Explore on Packagist.
Structure
Folders in your project after set up:
app, public, tests, writable
vendor/codeigniter4/framework/system
Latest Dev
The App Starter repo comes with a builds
scripts to switch Composer sources between the
current stable release and the latest development branch of the framework. Use this script
for a developer who is willing to live with the latest unreleased changes, which may be unstable.
The development user guide is accessible online. Note that this differs from the released user guide, and will pertain to the develop branch explicitly.
Update for Latest Dev
In your project root:
php builds development
The command above will update composer.json to point to the develop
branch of the
working repository, and update the corresponding paths in config and XML files.
After using the builds
command be sure to run composer update
to sync your vendor
folder with the latest target build. Then, check the Upgrading From a Previous Version and update project
files if necessary.
Next Minor Version
If you want to use the next minor version branch, after using the builds
command
edit composer.json manually.
If you try the 4.4
branch, change the version to 4.4.x-dev
:
"require": {
"php": "^7.4 || ^8.0",
"codeigniter4/codeigniter4": "4.4.x-dev"
},
And run composer update
to sync your vendor
folder with the latest target build. Then, check the Upgrading Guide
(user_guide_src/source/installation/upgrade_{version}.rst) and
update project files if necessary.
Revert to Stable Release
To revert the changes run:
php builds release
Adding CodeIgniter4 to an Existing Project
The same CodeIgniter 4 framework repository described in “Manual Installation” can also be added to an existing project using Composer.
Installation
Develop your app inside the app
folder, and the public
folder
will be your document root.
In your project root:
composer require codeigniter4/framework
Important
When you deploy to your production server, don’t forget to run the following command:
composer install --no-dev
The above command will remove the Composer packages only for development
that are not needed in the production environment. This will greatly reduce
the vendor folder size.
Setting Up
Copy the app, public, tests and writable folders from vendor/codeigniter4/framework to your project root
Copy the env, phpunit.xml.dist and spark files, from vendor/codeigniter4/framework to your project root
You will have to adjust the
$systemDirectory
property in app/Config/Paths.php to refer to the vendor one, e.g.,__DIR__ . '/../../vendor/codeigniter4/framework/system'
.
Initial Configuration
A few initial configurations are required. See Initial Configuration for the details.
Upgrading
Whenever there is a new release, then from the command line in your project root:
.. code-block:: console
composer update
Read the upgrade instructions, and check Breaking Changes and Enhancements.
Pros
Relatively simple installation; easy to update.
Cons
You still need to check for file changes in the project space (root, app, public, writable) after updating.
Note
There are some third-party CodeIgniter modules available to assist with merging changes to the project space: Explore on Packagist.
Structure
Folders in your project after set up:
app, public, tests, writable
vendor/codeigniter4/framework/system
Translations Installation
If you want to take advantage of the system message translations, they can be added to your project in a similar fashion.
From the command line inside your project root:
composer require codeigniter4/translations
These will be updated along with the framework whenever you do a composer update
.


Click to change foreground color
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Specials
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You can go to any high street photo shop. Remember to ask if their photos meet the rules for digital passport photos.
A shop will usually send you a digital photo code by email.
You'll enter this code to get your digital photo when you apply online.


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Dropbox Business simplifies your work, with a central place to access and share files.
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|
QuantLib: a free/open-source library for quantitative finance
Fully annotated sources - version 1.30
|
#include <ql/models/marketmodels/correlations/timehomogeneousforwardcorrelation.hpp>
Public Member Functions | |
| TimeHomogeneousForwardCorrelation (const Matrix &fwdCorrelation, const std::vector< Time > &rateTimes) | |
| const std::vector< Time > & | times () const override |
| const std::vector< Time > & | rateTimes () const override |
| const std::vector< Matrix > & | correlations () const override |
| Size | numberOfRates () const override |
| Public Member Functions inherited from PiecewiseConstantCorrelation | |
| virtual | ~PiecewiseConstantCorrelation ()=default |
| virtual const std::vector< Time > & | times () const =0 |
| virtual const std::vector< Time > & | rateTimes () const =0 |
| virtual const std::vector< Matrix > & | correlations () const =0 |
| virtual const Matrix & | correlation (Size i) const |
| virtual Size | numberOfRates () const =0 |
Static Public Member Functions | |
| static std::vector< Matrix > | evolvedMatrices (const Matrix &fwdCorrelation) |
Private Attributes | |
| Size | numberOfRates_ |
| Matrix | fwdCorrelation_ |
| std::vector< Time > | rateTimes_ |
| std::vector< Time > | times_ |
| std::vector< Matrix > | correlations_ |
Definition at line 30 of file timehomogeneousforwardcorrelation.hpp.
| TimeHomogeneousForwardCorrelation | ( | const Matrix & | fwdCorrelation, |
| const std::vector< Time > & | rateTimes | ||
| ) |
Definition at line 28 of file timehomogeneousforwardcorrelation.cpp.
|
overridevirtual |
Implements PiecewiseConstantCorrelation.
Definition at line 72 of file timehomogeneousforwardcorrelation.cpp.
|
overridevirtual |
Implements PiecewiseConstantCorrelation.
Definition at line 77 of file timehomogeneousforwardcorrelation.cpp.
|
overridevirtual |
Implements PiecewiseConstantCorrelation.
Definition at line 82 of file timehomogeneousforwardcorrelation.cpp.
|
overridevirtual |
Implements PiecewiseConstantCorrelation.
Definition at line 86 of file timehomogeneousforwardcorrelation.cpp.
Definition at line 50 of file timehomogeneousforwardcorrelation.cpp.
|
private |
Definition at line 42 of file timehomogeneousforwardcorrelation.hpp.
|
private |
Definition at line 43 of file timehomogeneousforwardcorrelation.hpp.
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private |
Definition at line 44 of file timehomogeneousforwardcorrelation.hpp.
|
private |
Definition at line 44 of file timehomogeneousforwardcorrelation.hpp.
|
private |
Definition at line 45 of file timehomogeneousforwardcorrelation.hpp.


We study the neuropsychology of reality and its distortions.
"Do not try to bend the spoon; that's impossible.
Instead, only try to realize the truth...
There is no spoon.
Then you'll see that it is not the spoon that bends, it is only yourself."
The best way is to get in touch is to drop an email directly to any member of the team. For general inquiries, you can contact me via any of those:


Day 1
8:15
9:15
description
The curators of JSConf EU are Malte Ubl, Simone Haas, Holger Blank, Jan Lehnardt, and Feli Kugland.And we'll be joined by the JSConf EU MCs.
9:45
description
npm has more data than anyone about who JavaScript developers are and what we’re up to. Using registry stats and the results of our 2019 ecosystem survey of over 30,000 developers, I break down the current state of JavaScript and where trends look like they’re headed, so you can make more informed technical choices.
10:30
description
Remember loving to read comics on a Sunday afternoon when you were a kid? Maybe you don’t. In the past, traditional print comics have made it impossible for blind and visually-impaired readers to experience their heroes’ adventures first-hand. Today an increasing number of initiatives like comic book stores for the blind aim to overcome this challenge.
What if I told you that the web platform empowers us to even create comics for literally everyone?
Alongside a demo application, you see how accessibility best practices enable you to craft an immersive webcomic experience that is not only engaging for the sighted but accessible for everyone.
11:00
description
This presentation will explore basic approaches we can use as local communities to supporting diversity in tech by encouraging inclusivity for the tech communities.
description
Recharge with some inspiration during the break at the Community Lounge, where you'll hear several 5-minute stories of gratitude that highlight amazing people, their efforts, and the impact they've had on our community members.Our session begins 5 minutes after the break starts, so you have some time to grab a quick refreshment or take a short pause after the previous session.
description
Details and registration11:30
description
Have you wondered how JS engines work? This past year I built an engine from scratch in Rust. It was fun, weird, exciting and sometimes exhausting. I will share my experience as well as what it is like to work on the specification, collaborate with TC39, and lessons from engines in use today.
description
With CSS animations and web animations moving elements became possible in the browser. But how one moves an object in such a way that it appears “correct” for the human eye? How does a motion feel natural? These and similar questions confronted the artists who brought cartoons to life as early as 1906. Let’s take a look behind the scenes and see how drawings learned to walk and what we can learn from it for animations in the browser.
12:00
description
Thankfully, every year ECMAScript gives us new shinies to advance how we code JavaScript. I’ve found myself digging into features & proposals ever since my curiosity of ES2017’s SharedArrayBuffer
took me down a fascinating rabbit hole. Let’s delve into some of the features & proposals we get to look forward to in 2019.
description
This presentation is about server performance, which means that no time in the world would be enough to cover it all. Hopefully, I can share with you the top
#10 things I’ve learned while putting JavaScript on the top of the server side benchmarks.
You will learn about runtimes and engines, how some are more capable than others, and sometimes the obvious choice is not always the right one…
This talk is about thinking outside of the box, being creative and don’t take anything for granted. We will debunk myths about native code vs script or RAM usage, it’s going to be fast! I promise!
12:30
description
Not long ago, it seemed like JavaScript devices were going to free JS developers from the constraints of the browser and let us control every aspect of our lives as easily as we once controlled hover menus. Though nodebots were captivating, many of us were anxious for the JS device revolution to reach a more mundane destination: our phones. And yet today the constraints of the mobile landscape look not much different from several years ago. We have the same two operating systems, the same two app stores, and same option to write a native app or push people to save what is still mostly a bookmark. How did we cover so little distance, given the enthusiasm, resources, and potential that appeared to exist, and more importantly, how close can we come to a JavaScript phone today?
description
When I was a child I dreamt a lot about creating robots that helped me in my daily life, like tidying up my bedroom. That was just a dream till I grow up and found out that there’s something called home automation. So I decided to build Sasha, my cats’ pet sitter, that helps me by feeding my cats when I have to get home a little bit late. Sasha changed my life and my cats are stressless, because they can eat their meal at the right time.
In this talk I will share my experience on using JavaScript to build Sasha and will walkthrough its features. Last, I’ll talk about other possible use cases and the potential of home automation with JavaScript.
13:00
description
Recharge with some inspiration during the break at the Community Lounge, where you'll hear several 5-minute stories of gratitude that highlight amazing people, their efforts, and the impact they've had on our community members.Our session begins 5 minutes after the break starts, so you have some time to grab a quick refreshment or take a short pause after the previous session. We'll finish up halfway through the lunch break so you'll still have plenty of time to eat the delicious catered meal.
description
Welcome to { Live : JS } A collective of audio and visual artists who build live experiences, shows and installations. Why JS? Because that's the main technology we use: JavaScript.14:00
description
description
Before personal computing became a thing, there was a handful of programmers and artists saw computers as a tool beyond their intended purpose: to create art.
In this talk, we will explore the early history of computer art, from ghostly oscilloscope paints to pre-ASCII text art. We’ll discuss how simple techniques with limited technology back then could yield compelling pieces. We’ll see how the history of computer displays and printers have evolved in the 1950s to 1980s.
While quite a bit of retro art survives today, most of them do not come preserved with their algorithms. In this talk, I’ll also demo some attempts to recreate retro art pieces using p5.js, a JavaScript graphics library as well as talk through some of the techniques of creating generative computer art.
14:30
description
I will share my story of establishing and growing JS Community in a developing country Nepal. How tech communities will help you and other grow together ? Challenges that you might face while starting a community in your place. (Based on my experience) How to overcome these challenges ?
description
For millennia, mathematicians and artists have been fascinated by polyhedra, 3D shapes that encode complex symmetries and relationships. My name is [anonymized], and for the last ten years I have dedicated my life to sharing the beauty of these shapes with the world. Join me on an epic quest filled with ancient 3D libraries, arcane mathematical data structures, and Pokémon GIFs as I strive to make my vision a reality the only way I know how: an interactive web app. Come and twist, expand, and gyroelongate polyhedra with me, and let my journey inspire you to use the web to make your own passions come to life.
15:00
description
From its friendly developer experience to its performance benefits, a lot has been said about GraphQL. Underlying it all is the GraphQL query language, made possible by GraphQL schema language. These surprisingly versatile features have the potential to provide a single interface for all modern web app development concerns.
We will start with a case study on how we use GraphQL queries as an universal interface to resolve data over a variety of datasources ranging from remote HTTP requests, to local CSV files, and in-memory data stores. Next we will explore these ideas further, using GraphQL queries as an interface over the DOM and various other web APIs.
description
To build inclusive websites, developers have to consider accessibility, performance and user flows. Crafted source code forms the foundation for thought-through UIs, but it’s not only about the code. Let’s have a look at HTTP, and to be specific, its headers that can have a direct impact on user experience.
15:30
description
Many if not all of us have been “the only one” in boardrooms, design reviews, diversity and inclusion discussions. Our isolation from people who look like us with similar lived experiences often forces us into roles where we speak on behalf of and advocate for the whole.
While honourable and sometimes necessary for self and community preservation, repeatedly playing this role can incur a psychological and career debt: it spends our resources in ways we don’t choose.
Through this talk, we’ll seek the balance between our moral imperatives to society, improvement of our environments, and our care to ourselves. We will celebrate the forgiveness for our past and future choices, recognising that the choices we make are never easy.
description
Recharge with some inspiration during the break at the Community Lounge, where you'll hear several 5-minute stories of gratitude that highlight amazing people, their efforts, and the impact they've had on our community members.Our session begins 5 minutes after the break starts, so you have some time to grab a quick refreshment or take a short pause after the previous session.
description
Welcome to { Live : JS } A collective of audio and visual artists who build live experiences, shows and installations. Why JS? Because that's the main technology we use: JavaScript.16:00
description
Teaching programming to children is hard. Computer Science topics can be difficult to grasp using standard programming languages and tools. Using MIT’s Scratch programming platform, creating games and working software is simple and fun thanks to their drag and drop interface.
To prove that this is as simple as it sounds, this session will be led by a 13-year-old. What better way to learn how to teach kids how to code than by learning from a kid?
description
As usage of ad blocking software has risen over the years, an entire micro-industry has popped up catering to publishers - promising to get around the ad blocker and show ads to users of ad blocking software.
Some of these techniques rely on browser bugs, or limitations of browser extensions and some are just extremely creative ways to get around ad-blockers.
In this talk, we’ll go over some of the techniques used in this cat and mouse game between ad blocking extensions and the people who want to circumvent them. It’s a fascinating peek into a world very few people seem to know.
16:30
description
Javascript runs on nearly any platform. Most languages can compile to Javascript. It’s well-positioned to become the lingua franca of programmers, with one problem: Like most programming languages, Javascript is based on English. 89% of the world’s population doesn’t speak any English. Many of those people can’t even read the Latin script. If we want Javascript to be a lingua franca, we need to ensure it is accessible to all people, regardless of their native language.
Let’s look at the barriers that non-native speakers face when contributing to OSS Javascript projects and what it would take to remove them entirely, so that two developers could collaborate without speaking the same language. We will see what techniques Javascript can borrow from other languages by taking a look at করো (koro), a project which adds Bengali support to the Go compiler. And, we will learn enough about compilers and character encoding to answer the eternal question: “Could we do this in Javascript?”
description
Accessibility on the web for all groups including the visually and motor impaired is an important issue. But many of the usability lessons we explore on our products today are actually centuries old. Let’s explore how these concepts are manifested in coats of arms throughout history. Come learn about what we can learn from the designers of medieval crests.
17:00
description
When I became a parent, I was completely unprepared for the challenges that awaited me. I reached out to hundreds of fellow parents in tech and learned there are common challenges that simply aren’t spoken about. These focus around one fact that no one wants to admit… parenting is not fun. Parenting is stressful, difficult, and oftentimes incredibly lonely. But being a parent also makes people more organized, focused, and empathetic. We’ll explore these survey results to expose common trends and issues and discuss solutions that show how supporting parents helps all team members thrive.
description
This talk will discuss why we think that JavaScript is a good language option for IoT development by walking you through a loosely coupled end to end IoT system, from new device on-boarding to remote access via gateway.
Technologies we have been used and/or contributed to for building the IoT system using JavaScript will be discussed. At each stage, GDPR compliance of these technologies will be looked into.
To address the issue of resource restriction in embedded devices, we will introduce you to JerryScript, an ultra-light JavaScript engine by Samsung. It is followed by a comparison of popular JavaScript platforms based on JerryScript that provide direct JavaScript APIs to developers. The open gateway framework is node.js based and targets at decentralized ‘Internet of Things’ with privacy and security in mind.
17:30
description
Open Source maintainers, enthusiasts, beginners, and everyone in between are invited to the Community Lounge for a casual hang out session to talk about projects and contributions.17:45
description
With nearly 1,000,000 packages, the npm ecosystem is the largest out there, by far – but the ecosystem and its package manager were created in more humble times, for small projects and packages centered around the Node.js ecosystem itself.
It’s about time we redefined package management for modern web development, and that redefinition is tink: a package unwinder for JavaScript brought to you by npm itself. With tink, you’ll find unprecedented speeds, deep compatibility with everything from Node.js to bundlers, and a UX workflow optimized for the modern web developer. Come join us for the official unveiling and find out what the future of all package management will look like for years to come.
description
Augmented reality is already making its way into everyday browsers! This talk will dive into what that might mean for the traditional web developer, and why developing immersive experiences makes so much sense on the web, even in the face of native alternatives. We will cover topics like off-the-shelf web technologies, performance, and privacy all in the context of augmented reality.
18:15
description
Since its creation in 2016, Yarn continuously pushed for better standards in the JavaScript ecosystem in particular. Dependency locking, built-in monorepos, zero-network modes, Plug’n’Play resolution, we’ve been on all fronts. Let’s discuss what we have in store for the future, and what it means for our ecosystem!
description
We all know and love framework-like features such as hot module replacement, reactive properties, templating, CSS-in-JS, lazy-loaded bundling, etc. Stencil is a new approach, a build-time abstraction with framework-level productivity, that generates hand-optimized components using future-proof web APIs. We’ll discuss the architecture of Stencil and the innovations a compiler can introduce to your apps and design systems!
18:45
description
The JS package commons is in the hands of a for-profit entity. We trust npm with our shared code, but we have no way to hold npm accountable for its behavior. A trust-based system cannot function without accountability, but somebody still has to pay for the servers. How did we get here, and what should JavaScript do now?
19:15
description
The curators of JSConf EU are Malte Ubl, Simone Haas, Holger Blank, Jan Lehnardt, and Feli Kugland.And we'll be joined by the JSConf EU MCs.
19:16
21:00
description
Join us for a walk through of the JavaScript magic powering this stage.
{ live : js } collective of audio and visual artists who build live experiences, shows and installations. Why JS? Because that’s the main technology we use: JavaScript.
We are:
21:40
description
After so many years sitting with the computer you can take your old scratched Les Paul or Stratocaster from the case and fill all the space around with warm riffs. I’m going to show how to transform the code into Kirk Hammett’s wah-wah, Stevie Ray Vaughan’s overdrive and Kurt Cobain’s distortion. You’ll learn how to parse audio input in real-time using JavaScript and the Web Audio API.
I’ll be jamming live on stage with my guitar to demo every code example and we’ll also use WebRTC to jam with friends across the world! After this talk, you will be familiar with the principles behind pedal sound effects and how to create them in code. Let’s rock the Web!
22:20
description
Most people connected to the Web are carrying JavaScript in their pocket without even knowing it, and those of us making tools for building with it are either unaware of or blissfully ignoring that population. While JavaScript’s pervasiveness grows, so is the gap in its literacy, and this is a gap we need to solve if we’re ever going to survive self-driving cars on the blockchain. Let’s talk about JavaScript, the tool, as opposed to JavaScript, the Oracle-run Twitter account.
Day 2
9:00
9:55
10:00
description
Machine Learning is a powerful tool that offers unique opportunities for JavaScript developers. This is why we created TensorFlow.js, a library for training and deploying ML models in the browser and in Node.js. In this talk, you will learn about the TensorFlow.js ecosystem: how to bring an existing ML model into your JS app and re-train the model using your data. We’ll also go over our efforts beyond the browser to bring ML to platforms such as React Native, Raspberry Pi, and Electron, and we’ll do a live demo of some of our favorite and unique applications!
10:30
description
It’s almost here! Houdini — the future of CSS! This spec allows developers to write web worklets with JavaScript syntax and access the CSS Object Model for the very first time. Everything will change!
In this talk, we’ll will walk through some of the visual magic we can create by using Houdini and its various upcoming browser APIs, and go through a live demo of how we can get started with implementation. Learn about how to use Houdini and what it means for the future of web application styling.
description
Offline capable web apps have come a long way in just a few years. Tools like service workers, PouchDB & CouchDB gave answers to the first questions of “can we do this, where do we begin?”, pushing new possibilities to the browser.
But taking the medical supply system online & offline for Africa’s most populous country asked us a whole new set of questions. How do you model distributed data and scalable code for 30,000 clinics? What about that growth is easy to mess up, and how do we plan for it?
11:00
description
In September of 2008, Google’s Chromium Project released V8, a JavaScript engine, as part of a browser optimization wave that heralded the era of JavaScript browser applications that we both love, and love to hate. Less than a year later, in 2009, Ryan Dahl announced (at this very conference!) a way to run the V8 browser environment outside of the browser- Node.js, a platform that held the promise of unifying web application development, where both client and server side development could happen in the same language - JavaScript.
A decade later, V8, JavaScript, and its new buddy WebAssembly, have expanded to lands charted only a few years after Node.js debuted- known (confusingly) as the “Edge”. In this talk, we’ll introduce what the “Edge” is and why we are excited for it to revolutionize computation on the web. We’ll explore how this adventurous JavaScript engine, V8, is so well suited to tasks previously limited to Virtual Machines, Containers, or even simply Operating Systems. Finally, we’ll talk about security, Spectre, and ask ourselves the age old question, “You can do it, but should you?”.
In true JSConf EU tradition, this talk itself is going be an exciting announcement. You should come if you want to be there for the beginning of a new era of the Internet.
description
“Queers hate techies,” the slogan proudly proclaimed in a window in San Francisco.
The tech industry provides a safe haven for many queer folks, myself included. It offers stable employement to us more willingly than other industries. These benefits don’t extend to all queer folks though, and these benefits are often revoked as soon as we step out of line. Queer folks are a model minority in an industry who’s products often negatively impact our community.
This talk will dive into these complications and how we can improve the tech industry to make it a truly welcoming place for queer folks.
11:30
description
I will be discussing what JavaScript is, how to get started, and the best use cases for it. There are a number of libraries, frameworks, and service operations of JavaScript and for people who are new to it like myself it can be a bit confusing. Researching what JavaScript is and implementing what you learn by programming a website is the best way to master it. I will clarify the capabilities of the language and ways you can get started learning JavaScript in 2019.
description
OMG CLIMATE is series of free, open source, community run unconferences about tech and the climate crisis, run in London, Berlin and Bangalore. Co-organiser @mrchrisadams will share lessons learned so far running them, and what people in tech can do about climate change.Our session begins 5 minutes after the break starts, so you have some time to grab a quick refreshment or take a short pause after the previous session.
description
Details and registration11:45
description
Very few developers have the need to write super optimized code. In application development we tend to favor readability over optimization. But that’s not the case with frameworks. Developers who use frameworks expect them to run as fast as possible. In fact, speed is often a defining characteristic when choosing a framework. There are techniques that make code run faster. You’ve probably heard about linked lists, monomorphism and bitmasks, right? Maybe you’ve even used some. Well, you can find all these and a bunch of other interesting approaches in the sources of most popular JS frameworks. Over the past year I’ve seen a lot while reverse-engineering Angular and React. In this talk I want to share my findings with you. Some of you may end up applying them at work. And others, who knows, may even end up writing the next big framework.
description
Many would argue there are only two hard problems in software: naming and cache invalidation. I’d argue there’s a third problem - abstractions. Whether you’re implementing an API for devs outside of your organization or creating a reusable library for devs on your team, creating the right level of abstraction is difficult. You have to balance flexibility with the ease-of-use. The correct choice is often a function of time constraints, compromise, and trial & error. I’ll talk about how to navigate these issues more efficiently.
12:15
description
Performance advocates spend a lot of time telling developers how to build fast and reliable experiences on the web. Every website is built differently, however.
Instead of just listing a number of progressive enhancements and techniques, this talk will try to take a different approach. We’ll first explore who needs to consider improving their site in the first place and see if their is a messaging problem between advocates and developers in the community. We’ll then address concerns that can arise when performance is being worked on and discuss some real and practical solutions.
description
Travelling to JSConf EU from another country? You probably had to pay an arm and a leg for a data roaming package on your phone. But there’s a better way! What if I told you that you could stay connected to the internet with a phone that can only send and receive text messages? In this talk we’ll build our own browser that makes all requests over SMS, so that next time you can forget about that fancy data package.
12:45
description
How WordPress built its own brand new visual editor experience from the ground up. The talk will include an introduction of WordPress and how the Gutenberg editor project started, details of how it works and how we incrementally improved the block editor over two years, and what our plans are for the future.
description
There’s a divisive movement around the world which has arguable impacted the software development community. How can we remain open-minded and respectful when talking about different programming paradigms or languages?
In this talk, I will be talking about empathy, how we can have divergent views and still have meaningful conversations.
13:15
description
Recharge with some inspiration during the break at the Community Lounge, where you'll hear several 5-minute stories of gratitude that highlight amazing people, their efforts, and the impact they've had on our community members.Our session begins 5 minutes after the break starts, so you have some time to grab a quick refreshment or take a short pause after the previous session. We'll finish up halfway through the lunch break so you'll still have plenty of time to eat the delicious catered meal.
description
Welcome to { Live : JS } A collective of audio and visual artists who build live experiences, shows and installations. Why JS? Because that's the main technology we use: JavaScript.14:15
description
Teaching absolute beginners with no technical experience whatsoever to understand Javascript can be quite a daunting task. It’s more challenging if you have a thick British accent and your students are mostly African students. If you’ve ever designed a tech curriculum then you understand how complicated this can be. At code Afrique where we help the community by offering a free weekend intensive bootcamp, we explored and have now achieved success with ember where we had earlier failed. The aim of this talk is to show, what we tried, where we failed and how Javascript via Ember brought us success like no other.
description
Node.js has been using a derivative of nginx’s parser with a lot of customization/rewrite since its inception. Despite being fast enough, the project architecture made it very hard to maintain in a long run. To mitigate that, the author has created a tool to generate the new HTTP parser called “llhttp” from the TypeScript code in understandable, verifiable, and maintainable way. Incidentally, the performance of “llhttp” is two times better than of the old parser. In this talk we’ll walk through the basics of generating such parsers and how “llhttp” works.
14:45
description
PWAs are now installable on every mobile and desktop OSs, but there is a lot of new things since last year we need to do to create a successful experience. We will start understanding the App Lifecycle on every OS including new APIs, the limitations on iOS and how to deal with them, and how WebAPK works on Android. We will mention challenges on desktop PWAs, including multi-window management and we will finally cover distribution channels, including new DOM events to improve analytics, how to create a custom Install experience, and how to distribute the app in the store.
description
Web APIs developed and standardized by the browsers have been serving client-side JavaScript applications with a wide selection of features out of the box, while Node.js have been developing another set of APIs that are today the de-facto standards for server-side JavaScript runtimes. There is now a conscious effort to bring the two worlds closer together, in particular by introducing more Web APIs into Node.js core, but it’s not an easy ride - not every Web API, designed for the browsers, makes sense for Node.js.
In this talk, we are going to take a look at the story of Web APIs in Node.js core - what Node.js have implemented, what are being discussed, what are blocking more APIs from being implemented, and what we can do to improve the developer experience of the JavaScript ecosystem.
15:15
description
Currently only ‘fs’ and ‘dns’ have an experimental promise api in Node core. People LOL at node.js core modules for still using the callback pattern. I could launch into a bunch of puns here but instead I’ll just say the current status is sad but fixable. Where are we? What do we need to do? How can you help?
Footnotes: https://twitter.com/MylesBorins/status/1064925041039761409 https://twitter.com/cramforce/status/1064734275478577152
15:45
description
In this talk, I’ll walk you through my journey as a woman of color in tech and how I got to where I am today as a software engineer at a high growth unicorn startup. 🦄
description
Recharge with some inspiration during the break at the Community Lounge, where you'll hear several 5-minute stories of gratitude that highlight amazing people, their efforts, and the impact they've had on our community members.Our session begins 5 minutes after the break starts, so you have some time to grab a quick refreshment or take a short pause after the previous session.
description
Welcome to { Live : JS } A collective of audio and visual artists who build live experiences, shows and installations. Why JS? Because that's the main technology we use: JavaScript.16:15
description
The JavaScript ecosystem has been breaking ground in both the Browser and in the backend with Node.js since JSConfEU launched 10 years ago. We’ve recently recognized that in the same way that using JavaScript both on the front and back end unlocks opportunities for more people to contribute to a larger part of an overall application, combining the JavaScript and Node.js Foundations allows for easier collaboration and contribution to larger portions of the JavaScript ecosystem. This panel will cover the key issues, concerns, discussions, and lessons learned that were part of the effort to bring the JavaScript and Node.js Foundations together. We’ll also dive into the new opportunities and exciting future it brings to people and projects across the JS ecosystem.
Panelists
description
V8 is the JavaScript engine powering Google Chrome, Node.js and NativeScript. NativeScript embeds V8 to process JavaScript and dynamically call Android APIs. This enables developers to write Android applications in JavaScript and directly access the underlying OS. Come to this session to learn what challenges the NativeScript team met embedding V8 in a mobile framework and how you can power any C++ based application with one of the most sophisticated JavaScript engines.
16:45
description
The year is 1972 and GUI applications like no one has seen before are being built in Smalltalk: bitmaps graphics, draggable elements, drop-down menus, collapsable windows 🤯; all of them and many more coming straight from the future, powered by asynchronous message passing, object orientation, and functional programming. An unprecedented cocktail to be later rediscovered as the Actor-model.
Fast forward to the present day, and typical web applications are modeled as monolithic deeply nested structures, resembling the medium the web was built for (HTML), but leaving us handicapped to build outstanding user facing applications. 🦖
Let’s explore together what we can learn from the early days of UIs, languages like Erlang and Smalltalk, the Actor-model, and how we can apply some of these principles and ideas today to take our UIs back to the future 🚀
description
Producing tissue paper, kitchen rolls, folded napkins or toilet paper is not for the faint of heart. Gigantic machines rewind huge rolls of tissue paper weighing almost a ton processing it at a speed of 40 km/h, and a single minute of downtime cuts into the slim margins of the paper industry.
The asynchronous nature of Javascript and Node.JS allows telemetry data to be harvested from ancient PLCs controlling the production, and its real-time analysis in the cloud, enabling operators and factories to raise production quality, improve performance and reduce waste.
Join me on a journey to understand how modern programming techniques make IIoT and Industry 4.0 a reality today in the toilet paper world!
17:15
description
Open Source maintainers, enthusiasts, beginners, those just curious, and everyone in between are invited to the Community Lounge for a casual hang out session to talk about projects and contributions.17:30
description
In 2009 I was managing Yahoo’s tech event budget when we agreed to sponsor the very first JSConf, the one that almost didn’t happen, the one that started something… And though I’ve still never attended a JSConf, nor learned to code, the zeitgeist of the JavaScript community and its event culture have had a profound effect on how I live and the devrel work I do.
I’d like to speak about cultivating “JavaScript: The Good Times”—the evolution of inclusiveness, the effort to replace customs that no longer reflect the values and demographics of the community, the focus on new practices for joyful conference-going and knowledge sharing. The JavaScript ethos has fueled a reinvention of the tech gathering as an act of participation and experiment, generating enduring artifacts for learning and excellent new habits for our relationships - personal and professional.
18:00
description
Until 1992, the web was largely textual, reserved almost exclusively to academia, with the charm of searching for library books via card catalogs.
The sea change came when a browser allowed for both text and images to now be displayed in the viewport. Despite some vehement opposition, this was described as the “gateway to the riches of the internet”.
This was a technological advancement that some had wagered would further fuel more advacement. We now have seen technologies like APIs, PWAs, DevTools and many more.
“The Shape Of The Web” is about both accomplishments and challenges that lay in past, present and future of the web - from its technologies employed and its employed technologists.
18:30
description
The curators of JSConf EU are Malte Ubl, Simone Haas, Holger Blank, Jan Lehnardt, and Feli Kugland.And we'll be joined by the JSConf EU MCs.


This wizard will guide you through the transformation of your relational database to RDF, and then either through the dump of the result into an RDF triple store, or through the publication of the result as a SPARQL endpoint.
The transformation of your relational data is essentially limited to what is called "Direct Mapping", i.e., the structure of the database will be preserved in the result. However, the generated URIs will be configurable, and certain metadata can be added.
Please have your database address and credentials handy, and possibly also the access to the server where the SPARQL endpoint is to be launched.
In this step, you configure the access data and credentials for your database.
If a SPARQL endpoint is to be set up, your access data credentials will be stored in its configuration and be used throughout its lifetime.
In this step, you select which tables and which columns are to be taken into account in the transformation. Whenever a selected column is a Foreign Key, the referenced table and its Primary Key column(s) should also be selected.
In this step, you specify the translations of table names to types, and of column headers to properties. You first select a table, ask the oracle, and then select from its ranked answers.
You will have to go through all those tables and columns that were selected for transformation in the previous step (“Database Contents”).
In this step, you specify the URIs that will be generated for each row of every selected table. Typically, they are made up of your web address and the content of the column(s) that constitute the Primary Key, intervened by fixed separators.
In this step, you choose whether you dump the current state of the database to an RDF triple store, or establish a SPARQL endpoint that performs the specified transformations dynamically on request.
In either case, you will have to provide the respective technical information, such as file paths and the like.
You are finished with this process!
Now you can go back to the LinDA Workbench and proceed to visualize or to analyze the output RDF dataset.
❦


| Prefix | IRI |
|---|---|
| rdf | http://www.w3.org/1999/02/22-rdf-syntax-ns# |
| rdfs | http://www.w3.org/2000/01/rdf-schema# |
| xsd | http://www.w3.org/2001/XMLSchema# |
| owl | http://www.w3.org/2002/07/owl# |
| dc | http://purl.org/dc/elements/1.1/ |
| VEngine | https://valospace.org/engine/0# |
| VKernel | https://valospace.org/kernel/0# |
| VValk | https://valospace.org/valk/0# |
| VState | https://valospace.org/state/0# |
| rdfs:subClassOf | description |
|---|---|
#Class | |
| VKernel:Class The class of classes which are defined by the ValOS kernel domain ontologies. | The class of all valosheath type prototype properties. |
#Property | |
| VKernel:Property The class of properties which are defined by the ValOS kernel domain ontologies. | The class of all valosheath type prototype properties. |
#Method | |
| VKernel:Property The class of properties which are defined by the ValOS kernel domain ontologies. | The class of all valosheath type prototype methods. |
#Global | |
| rdfs:Resource | The class of all valosheath global resources. |
#ObjectProperty | |
| rdf:Property | The class of all valosheath object properties. |
#ObjectMethod | |
| rdf:Property | The class of all valosheath object methods. |
| rdfs:domain | rdfs:range |
|---|
| Comment | rdf:type |
|---|
| rdf:type | Comment |
|---|
| rdf:type | rdfs:subClassOf |
|---|---|
#valosheath | |
| VKernel:API The class of concepts which represent application programming interfaces. | |
| description | The API for accessing valos fabric from valospace.Contains the vocabulary with which valoscript code can access non-valospace resources, notably including the services of the current execution environment. |


com
.
johnsnowlabs
license
package
license
Visibility
Public
All
Type Members
final
case class
LicenseValidationException
(
message:
String
=
""
,
cause:
Throwable
=
None.orNull
)
extends
Exception
with
Product
with
Serializable
trait
Licensed
extends
AnyRef
Value Members
object
Keys
object
LicenseValidator
Ungrouped


List Play
Playful features and effects for lists for use in experimenting and generating new ideas for your project. Not recommended in production.
ol number-big experimental
- List item 1 that is longer and wraps to two lines
- List item 2
- List item 3

List item 1 that is longer and wraps to two lines

list item 2

list item 3

This is an

list with big numbers. Create an

tag that contains

tags, and apply the list-number
class. Number colors and font styles can be customized by mixing in classes such as number-serif
and number-gray
. Create an

tag that contains

tags, and apply the list-number
and number-big
classes.


|
Apache Ignite.NET
|
Reader for binary objects. More...
Public Member Functions | |
| byte | ReadByte (string fieldName) |
| Read named byte value. More... | |
| byte[] | ReadByteArray (string fieldName) |
| Read named byte array. More... | |
| char | ReadChar (string fieldName) |
| Read named char value. More... | |
| char[] | ReadCharArray (string fieldName) |
| Read named char array. More... | |
| short | ReadShort (string fieldName) |
| Read named short value. More... | |
| short[] | ReadShortArray (string fieldName) |
| Read named short array. More... | |
| int | ReadInt (string fieldName) |
| Read named int value. More... | |
| int[] | ReadIntArray (string fieldName) |
| Read named int array. More... | |
| long | ReadLong (string fieldName) |
| Read named long value. More... | |
| long[] | ReadLongArray (string fieldName) |
| Read named long array. More... | |
| bool | ReadBoolean (string fieldName) |
| Read named boolean value. More... | |
| bool[] | ReadBooleanArray (string fieldName) |
| Read named boolean array. More... | |
| float | ReadFloat (string fieldName) |
| Read named float value. More... | |
| float[] | ReadFloatArray (string fieldName) |
| Read named float array. More... | |
| double | ReadDouble (string fieldName) |
| Read named double value. More... | |
| double[] | ReadDoubleArray (string fieldName) |
| Read named double array. More... | |
| decimal | ReadDecimal (string fieldName) |
| Read named decimal value. More... | |
| decimal[] | ReadDecimalArray (string fieldName) |
| Read named decimal array. More... | |
| DateTime | ReadTimestamp (string fieldName) |
| Read named date value in UTC form. More... | |
| DateTime[] | ReadTimestampArray (string fieldName) |
| Read named date array in UTC form. More... | |
| string | ReadString (string fieldName) |
| Read named string value. More... | |
| string[] | ReadStringArray (string fieldName) |
| Read named string array. More... | |
| Guid | ReadGuid (string fieldName) |
| Read named GUID value. More... | |
| Guid[] | ReadGuidArray (string fieldName) |
| Read named GUID array. More... | |
| T | ReadEnum< T > (string fieldName) |
| Read named enum value. More... | |
| T[] | ReadEnumArray< T > (string fieldName) |
| Read named enum array. More... | |
| T | ReadObject< T > (string fieldName) |
| Read named object. More... | |
| T[] | ReadArray< T > (string fieldName) |
| Read named object array. More... | |
| ICollection | ReadCollection (string fieldName) |
| Read named collection. More... | |
| ICollection | ReadCollection (string fieldName, Func< int, ICollection > factory, Action< ICollection, object > adder) |
| Read named collection. More... | |
| IDictionary | ReadDictionary (string fieldName) |
| Read named dictionary. More... | |
| IDictionary | ReadDictionary (string fieldName, Func< int, IDictionary > factory) |
| Read named dictionary. More... | |
| IBinaryRawReader | GetRawReader () |
| Get raw reader. More... | |
| IBinaryRawReader Apache.Ignite.Core.Binary.IBinaryReader.GetRawReader | ( | ) |
| T [] Apache.Ignite.Core.Binary.IBinaryReader.ReadArray< T > | ( | string | fieldName | ) |
| fieldName | Field name. |
| bool Apache.Ignite.Core.Binary.IBinaryReader.ReadBoolean | ( | string | fieldName | ) |
| fieldName | Field name. |
| bool [] Apache.Ignite.Core.Binary.IBinaryReader.ReadBooleanArray | ( | string | fieldName | ) |
| fieldName | Field name. |
| byte Apache.Ignite.Core.Binary.IBinaryReader.ReadByte | ( | string | fieldName | ) |
| fieldName | Field name. |
| byte [] Apache.Ignite.Core.Binary.IBinaryReader.ReadByteArray | ( | string | fieldName | ) |
| char Apache.Ignite.Core.Binary.IBinaryReader.ReadChar | ( | string | fieldName | ) |
| fieldName | Field name. |
| char [] Apache.Ignite.Core.Binary.IBinaryReader.ReadCharArray | ( | string | fieldName | ) |
| ICollection Apache.Ignite.Core.Binary.IBinaryReader.ReadCollection | ( | string | fieldName | ) |
| fieldName | Field name. |
| ICollection Apache.Ignite.Core.Binary.IBinaryReader.ReadCollection | ( | string | fieldName, |
| Func< int, ICollection > | factory, | ||
| Action< ICollection, object > | adder | ||
| ) |
| fieldName | Field name. |
| factory | Factory. |
| adder | Adder. |
| decimal Apache.Ignite.Core.Binary.IBinaryReader.ReadDecimal | ( | string | fieldName | ) |
| fieldName | Field name. |
| decimal [] Apache.Ignite.Core.Binary.IBinaryReader.ReadDecimalArray | ( | string | fieldName | ) |
| fieldName | Field name. |
| IDictionary Apache.Ignite.Core.Binary.IBinaryReader.ReadDictionary | ( | string | fieldName | ) |
| fieldName | Field name. |
| IDictionary Apache.Ignite.Core.Binary.IBinaryReader.ReadDictionary | ( | string | fieldName, |
| Func< int, IDictionary > | factory | ||
| ) |
| fieldName | Field name. |
| factory | Factory. |
| double Apache.Ignite.Core.Binary.IBinaryReader.ReadDouble | ( | string | fieldName | ) |
| fieldName | Field name. |
| double [] Apache.Ignite.Core.Binary.IBinaryReader.ReadDoubleArray | ( | string | fieldName | ) |
| fieldName | Field name. |
| T Apache.Ignite.Core.Binary.IBinaryReader.ReadEnum< T > | ( | string | fieldName | ) |
| fieldName | Field name. |
| T [] Apache.Ignite.Core.Binary.IBinaryReader.ReadEnumArray< T > | ( | string | fieldName | ) |
| fieldName | Field name. |
| float Apache.Ignite.Core.Binary.IBinaryReader.ReadFloat | ( | string | fieldName | ) |
| fieldName | Field name. |
| float [] Apache.Ignite.Core.Binary.IBinaryReader.ReadFloatArray | ( | string | fieldName | ) |
| fieldName | Field name. |
| Guid Apache.Ignite.Core.Binary.IBinaryReader.ReadGuid | ( | string | fieldName | ) |
| fieldName | Field name. |
| Guid [] Apache.Ignite.Core.Binary.IBinaryReader.ReadGuidArray | ( | string | fieldName | ) |
| fieldName | Field name. |
| int Apache.Ignite.Core.Binary.IBinaryReader.ReadInt | ( | string | fieldName | ) |
| fieldName | Field name. |
| int [] Apache.Ignite.Core.Binary.IBinaryReader.ReadIntArray | ( | string | fieldName | ) |
| fieldName | Field name. |
| long Apache.Ignite.Core.Binary.IBinaryReader.ReadLong | ( | string | fieldName | ) |
| fieldName | Field name. |
| long [] Apache.Ignite.Core.Binary.IBinaryReader.ReadLongArray | ( | string | fieldName | ) |
| fieldName | Field name. |
| T Apache.Ignite.Core.Binary.IBinaryReader.ReadObject< T > | ( | string | fieldName | ) |
| fieldName | Field name. |
| short Apache.Ignite.Core.Binary.IBinaryReader.ReadShort | ( | string | fieldName | ) |
| fieldName | Field name. |
| short [] Apache.Ignite.Core.Binary.IBinaryReader.ReadShortArray | ( | string | fieldName | ) |
| string Apache.Ignite.Core.Binary.IBinaryReader.ReadString | ( | string | fieldName | ) |
| fieldName | Field name. |
| string [] Apache.Ignite.Core.Binary.IBinaryReader.ReadStringArray | ( | string | fieldName | ) |
| fieldName | Field name. |
| DateTime Apache.Ignite.Core.Binary.IBinaryReader.ReadTimestamp | ( | string | fieldName | ) |
| fieldName | Field name. |
| DateTime [] Apache.Ignite.Core.Binary.IBinaryReader.ReadTimestampArray | ( | string | fieldName | ) |
| fieldName | Field name. |


---
title: About Natlas
linkTitle: About
menu:
main:
weight: 10
---
{{< blocks/cover title="What is Natlas?" image_anchor="bottom" height="min" >}}
Continuous Recon For The Rest Of Us
{{< /blocks/cover >}}
{{% blocks/lead %}}
Natlas is an open source continuous reconnaissance platform which prioritizes identifying exposure, rather than identifying vulnerabilities. Identifying vulnerabilities often contains many similar steps that Natlas uses, however Natlas emphasizes collecting the most fundamental level of data, upon which further insight can be drawn.
{{% /blocks/lead %}}
{{< blocks/section >}}
Open Source
Open source is at the core of the Natlas project. Natlas makes extensive use of existing open source tools and libraries, and it's only fair that we pass that along with our project. Natlas and it's associated projects are licensed under
Apache 2.0 unless otherwise stated, which means you're free to use, distribute and modify Natlas to your hearts content. Just fork the repository you're interested in working on and jump right in!
{{< /blocks/section >}}
{{< blocks/section >}}
Continuous Reconnaissance
What does "continuous reconnaissance" mean? Well quite simply, it means that Natlas never stops scanning. When it completes it's scanning cycle, it starts again automatically. Port exposure is something that can change regularly and without notice, so it is unreliable to reference old port scans when making decisions. There's no licensing based on the number of addresses scanned, no fees, no artificial restrictions. You can scan as many addresses as fast as your deployment will let you. And if that's not fast enough, you can just scale up.
{{< /blocks/section >}}


China shows off Mars lander for international observers
Beijing plans to launch a lander and rover to Mars next year to explore parts of the planet in detail.
China invited observers to a successful test of its Mars lander as the country pushes for inclusion in more global space projects.
The demonstration of hovering, obstacle avoidance and deceleration capabilities was conducted at a site outside Beijing simulating conditions on the Red Planet, where the pull of gravity is about a third of that on Earth.
China plans to launch a lander and rover to Mars next year to explore parts of the planet in detail.
It has developed rapidly, especially since it conducted its first crewed mission in 2003, and has sought co-operation with space agencies in Europe and elsewhere.
The US has banned most space co-operation with China out of national security concerns, keeping Beijing from participating in the International Space Station.
Despite that, China’s ambitions continue to grow as it seeks to rival the US, Russia and Europe in space and cement its position as a regional and global power.
It is gradually constructing its own larger, more permanent space station in which it has invited foreign participation.
The refrigerator-sized craft was lowered gently on 36 cables through the air for about a minute and used onboard jets spraying rust-coloured fumes to alter its downward course.
“After the probe is launched, it will take about seven months to reach Mars, and the final procedure of landing will only last about seven minutes, which is the most difficult and the most risky part of the whole mission,” said the Mars mission’s chief designer, Zhang Rongqiao, standing before the 460ft-tall testing facility.
The remote Comprehensive Testing Ground for Landing on Extraterrestrial Bodies run by CASC lies an hour north of the Great Wall from Beijing.
Guests at Thursday’s event came from 19 countries and included the ambassadors of Brazil, France and Italy.
“This event is the first public appearance of China’s Mars exploration mission, also an important measure for China to pragmatically carry out space international exchanges and co-operation,” the China National Space Administration said in a news release.


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app
/
cz.palda97.lpclient.model.repository
/
BindingRepository
/
liveBindings
liveBindings
fun
liveBindings
(
)
:
LiveData
<
StatusWithBinding
>
LiveData with current template's bindings.


Method List
Search:
- #eval_body Forwarder::Meta
- #eval_chain Forwarder::Meta
- #eval_receiver Forwarder::Meta
- #eval_receiver_body Forwarder::Meta
- #eval_symbolic_receiver Forwarder::Meta
- #forward Forwarder
- #forward_all Forwarder
- #forward_to_self Forwarder
- identity Proc
- #object Forwarder::Meta::ObjectContainer
- sum Proc


| Operator | Definition | Examples |
|---|---|---|
| Assign operator which assign a value to a variable. | x = 3 + 4 assigns 7 to variable x. | |
| Equal sign which means left part has the same value as right part. | x + 1 == 7 + 3 means x + 1 has the same value as 7 + 3 (i.e. 10). Then x can be solved which is 9. | |
| Left parenthesis. Expression part inside a pair of parentheses should be calculated first. | x * (y + 3) | |
| Right parenthesis. Expression part inside a pair of parentheses should be calculated first. | x * (y + 3) | |
| Square bracket which starts an array. | [[1,2,3],[4,5,6]] is a 2*3 matrix whose first line includes elements 1, 2 and 3 and second line includes elements 4, 5 and 6. | |
| Close square bracket which ends an array. | [[1,2,3],[4,5,6]] is a 2*3 matrix whose first line includes elements 1, 2 and 3 and second line includes elements 4, 5 and 6. | |
| Comma character which seperates individual elements in an array. | [2,3,4,5] has four elements seperated by commas. | |
| Plus sign, which supports complex number, matrix and string. | 2.3 + 4.6 + 2i = 6.9 + 2i [1, 2] + [3, 4] = [3, 6] [1, 2] + " hello" = "[1,2] hello" |
|
| Minus sign, which supports complex number and matrix. | 4.6 - 2.3 = 2.3 [1, 2] - [3, 4] = [-1, -1] |
|
| Multiplication sign, which supports complex number and matrix and has higher priority than + (plus sign) and - (minus sign). | 1 + 2 * 3i = 1 + 6i [[1, 2]] * [[3], [4]] = [[11]] |
|
| Division sign, which supports complex number and matrix and has higher priority than + (plus sign) and - (minus sign). | 6 - 3 / 2i = 6 + 1.5i [[10,0.5]]/[[1,2],[3,4]] = [[-19.25,9.75]] |
|
| Left division (mainly for matrix to calculate x from Ax=b (i.e. x = A\b), note that first operand is divisor, do the same operation to division if divisor is not a matrix). | 6 - 3 / 2i = 6 + 1.5i [[1,2],[3,4]]\[[11],[32]] = [[10], [0.5]] |
|
| Bit wise and, which has higher priority than + (plus sign), - (minus sign), *, /. Note that it only accept non-negative operands. Moreover, if any of its two operands is not integer, it will be converted to an integer first. | 4 + 5.2 & 3.7 = 5 | |
| Bit wise or, which has higher priority than + (plus sign), - (minus sign), *, /. Note that it only accept non-negative operands. Moreover, if any of its two operands is not integer, it will be converted to an integer first. | 2.8 / 5.2 | 3.7 = 7 | |
| Bit wise xor, which has higher priority than + (plus sign), - (minus sign), *, /. Note that it only accept non-negative operands. Moreover, if any of its two operands is not integer, it will be converted to an integer first. | 14.2 / 5.2 ^ 3.7 = 2.3667 | |
| Power, which has higher priority than + (plus sign), - (minus sign), *, /, &, |, ^. Note that both the first and the second operands can be complex number. | 2 * 4 ** 3 = 128 (-4)**0.5 = 2i 3**(2+i) = 4.0935 +8.0152*i |
|
| Positive sign, which has higher priority than all the binary operators, e.g. + (plus sign), *, ^ and **. Note that positive sign supports arrays. | 4 - +3 = 1 +[4,3] = [4, 3] |
|
| Negative sign, which has higher priority than all the binary operators, e.g. + (plus sign), *, ^ and **. Note that negative sign supports arrays. | 4 ** -1 = 0.25 -1 ** 4 = 1 -[3.71i, [4, 5.33-6i]] = [-3.71*i,[-4, -5.33+6*i]] |
|
| Percentage, which has higher priority than all the binary operators and + (positive sign) and - (negative sign). Note that this operator does not support complex number. | -401.78% = -4.0178 5.77% = 0.0577 |
|
| Not sign, which has higher priority than all the binary operators and + (positive sign) and - (negative sign). If its operand is non-zero, it returns false, otherwise, it returns true. Note that this operator does not support complex number. | !-0.2 = False | |
| Bit wise not, which has higher priority than all the binary operators and + (positive sign), - (negative sign) and ! (not sign). Not that it only accepts non-negative operand. Moreover, if the operand is not integer, it will be converted to an integer first. | ~0 = -1 ~0.1 = -1 ~9 = -10 |
|
| Factorial sign, which has higher priority than all the binary operators and left unary operators. Not that it only accepts non-negative operand. Moreover, if the operand is not integer, it will be converted to an integer first. | 7! = 5040 | |
| 1D or 2D matrix or single value transpose, which has higher priority than all the binary operators and left unary operators. Note that it converts a 1D matrix to 2D matrix but returns the original value of single value operand. | (3 + 4i)' = (3 + 4i) [1, 2+3i]' = [[1], [2+3i]] [[1, 2],[3,4]] = [[1,3], [2, 4]] |


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deezload
Deezer URL of playlist, artist, album or user profile
index
limit
audio format
mp3
flac
Advanced settings
Output path
Playlist name
save as tree
slugify path
download
stop
finish


com.zello.channel.sdk
/
OutgoingVoiceConfiguration
/
source
source
val
source
:
VoiceSource
Object that provides audio.
Property
source
- Object that provides audio.


By Arne Hassel.
This is the result we're going for.
No messages yet; you should submit a message.
There is no persistent storage of messages, as Heroku doesn't support MongoHQ in Europe.
Open this website in two browsers/tabs. Once you send a message in one, it will show in the other.
Once you open this website, a connection is made to the server with a socket. This connection is maintained between multiple instances, making it possible to send messages between them.
This messages are then handled by a simple application, that handles the communication so that updates are shown on the website.
A simple chat-client based on libraries and services.


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