joepie91

Not all random values are created equal - for security-related code, you need a specific kind of random value.

A summary of this article, if you don't want to read the entire thing:

• Don't use Math.random(). There are extremely few cases where Math.random() is the right answer. Don't use it, unless you've read this entire article, and determined that it's necessary for your case.
• Don't use crypto.getRandomBytes directly. While it's a CSPRNG, it's easy to bias the result when 'transforming' it, such that the output becomes more predictable.
• If you want to generate random tokens or API keys: Use uuid, specifically the uuid.v4() method. Avoid node-uuid - it's not the same package, and doesn't produce reliably secure random values.
• If you want to generate random numbers in a range: Use random-number-csprng.

You should seriously consider reading the entire article, though - it's

abhisekp

JavaScript Concepts

— by Abhisek Pattnaik <[email protected]>

1. What is a Closure?
2. [[Prototype]] vs Prototype (in progress)
3. Express.js Middleware Simplified

Coming Soon

abhisekp

Six types of Variable Declarations in JavaScript

— by Abhisek Pattnaik <[email protected]>

awalx

Python 3 Exercises

A few Python exercises.

aleksandar-b

Javascript The Good Parts - Crockford
Principles of Object Oriented JavaScript - Zakas // important
YDKJS - `this` part - Simpson
Prototypes in Javascript - https://sporto.github.io/blog/2013/02/22/a-plain-english-guide-to-javascript-prototypes/
JavaScript - Understanding the weird parts. Antony Alicea
Functional Programming in JavaScript - Practice : http://reactivex.io/learnrx/
NodeJS - Antony Alicea
Understanding ES6 - Zakas

Visualisation

bearfrieze

Comprehensions in Python the Jedi way

by Bjørn Friese

Beautiful is better than ugly. Explicit is better than implicit.

-- The Zen of Python

I frequently deal with collections of things in the programs I write. Collections of droids, jedis, planets, lightsabers, starfighters, etc. When programming in Python, these collections of things are usually represented as lists, sets and dictionaries. Oftentimes, what I want to do with collections is to transform them in various ways. Comprehensions is a powerful syntax for doing just that. I use them extensively, and it's one of the things that keep me coming back to Python. Let me show you a few examples of the incredible usefulness of comprehensions.

Masd925

Some FCC one-liner solutions

koenbok

Advanced Programming

Programming setup

• Instant visual output.
• Fast startup time, fast execution.
• Sensible errors, with code locations.
• Easy to set up and get working.

Architecture

abhisekp

One Liner Solutions to FreeCodeCamp Challenges

See http://www.freecodecamp.com/abhisekp

ShortUrl to Gist: http://j.mp/abhisekpFCCSolnsOneLiners

Complete list of solutions: http://j.mp/abhisekpFCCSolns

Solved using RegExp: http://bit.ly/abhisekpFCCRegExpSolns

abhisekp

console.clear();

/* GLOBALS */
const GitterBot = {
  config: {
    roomId: '546fd572db8155e6700d6eaf', // FreeCodeCamp/FreeCodeCamp // <-- insert the room id
    token: '', // <-- insert your user token (Get it from https://developer.gitter.im/apps)
  }
};