mudge

class Maybe
  include Enumerable

  def initialize(value)
    @value = value
  end

  def each
    yield value unless value.nil?
  end

mudge

require 'set'

# Let's provide a default to_proc in terms of threequals
class Object
  def to_proc
    method(:===).to_proc
  end
end

class Set

mudge

module MongoDB
  class URI
    attr_reader :uri

    def initialize(uri)
      @uri = uri
    end

    def username
      matches[:username]

mudge

class Hash
  def to_proc
    method(:[]).to_proc
  end
end

%w(a b c d).map(&{"a" => 1, "b" => 2, "c" => 3})
# => [1, 2, 3, nil]

# Or, a more readable example:

mudge

Keybase proof

I hereby claim:

• I am mudge on github.
• I am mudge (https://keybase.io/mudge) on keybase.
• I have a public key ASBDGnU-C3RqiI8Qhc2PUEsdVcNTtf5avLN5urIUcEbzOwo

To claim this, I am signing this object:

mudge

<?php
$a = array(1, 2, 3);
$pairs = array_map(null, $a, array_slice($a, 1));

/**
 * Prints:
 * (1,2)(2, 3)(3, )
 */
foreach ($pairs as list($x, $y)) {
    echo "({$x}, {$y})";

mudge

<?php

/* From https://github.com/guzzle/iterator/blob/master/MapIterator.php */
class MapIterator extends \IteratorIterator
{
    /** @var mixed Callback */
    protected $callback;

    /**
     * @param \Traversable   $iterator Traversable iterator

mudge

<?php
/* Given an anonymous function with a previously unspecified number of arguments like so: */
$f = function ($x, $y, $z) {
    /* Do something interesting with $x, $y and $z. */
    return;
};

/* How can I convert it into the following nested function (each function yielding one argument),
 * finally calling $f when there are enough arguments?
 */

mudge

/* go(function () {
 *     console.log('Foo');
 * });
 */
var go = function (f) {
    if (typeof process.nextTick === 'function') {
        process.nextTick(f);
    } else if (typeof setImmediate === 'function') {
        setImmediate(f);
    } else {

mudge

<?php
/* A simple function to determine whether an IP is within a range
 * or not.
 *
 * Examples:
 *
 *   withinCIDR('1.2.3.4', '1.2.3.0/24');
 *   => 1
 *
 *   withinCIDR('1.2.3.4', '1.2.3.4');