gaearon

If you haven’t worked with JavaScript in the last few years, these three points should give you enough knowledge to feel comfortable reading the React documentation:

• We define variables with let and const statements. For the purposes of the React documentation, you can consider them equivalent to var.
• We use the class keyword to define JavaScript classes. There are two things worth remembering about them. Firstly, unlike with objects, you don't need to put commas between class method definitions. Secondly, unlike many other languages with classes, in JavaScript the value of this in a method [depends on how it is called](https://developer.mozilla.org/en-US/docs/Web/Jav

eliotsykes

Run rails new --help to view all of the options you can pass to rails new:

$ bin/rails new --help
Usage:
  rails new APP_PATH [options]

Options:
  -r, [--ruby=PATH]                                      # Path to the Ruby binary of your choice
                                                         # Default: /Users/eliot/.rbenv/versions/2.2.0/bin/ruby

rdebath

This archive contains the following programs:

 bfc          The compiler for the 'brainfuck' language (240 bytes!)
 bfc.asm      Source for the compiler
 bfi          The interpreter for the 'brainfuck' language
 bfi.c        Source for the interpreter (portable)
 src/         Some example programs in 'brainfuck'
 src/atoi.b   Reads a number from stdin
 src/div10.b  Divides the number under the pointer by 10
 src/hello.b  The ubiquitous "Hello World!"

paulakreuger

app.filter('capitalize', function() {
  return function(input, scope) {
    if (input!=null)
    input = input.toLowerCase();
    return input.substring(0,1).toUpperCase()+input.substring(1);
  }
});

DanHerbert

OBSOLETE

This entire guide is based on an old version of Homebrew/Node and no longer applies. It was only ever intended to fix a specific error message which has since been fixed. I've kept it here for historical purposes, but it should no longer be used. Homebrew maintainers have fixed things and the options mentioned don't exist and won't work.

I still believe it is better to manually install npm separately since having a generic package manager maintain another package manager is a bad idea, but the instructions below don't explain how to do that.

Fixing npm On Mac OS X for Homebrew Users

Installing node through Homebrew can cause problems with npm for globally installed packages. To fix it quickly, use the solution below. An explanation is also included at the end of this document.

flakyfilibuster

# Factorial Recursive #
#######################

# Long Version:

def factorial(n)
  if n == 0
    return 1
  else 
    return n*factorial(n-1)

zhengjia

=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')