damncabbage

#ruby
[1,2,3,4].select{ |x| x.even? }

#python
[x for x in [1,2,3,4] if not x%2]
#or, more norvingly
filter(lambda x: not x%2, [1,2,3,4])

#clojure
(filter #(even? % ) [1 2 3 4])

damncabbage

<?php

// array_merge() does terrible things to numeric keys.
// (Literal-numeric keys, that is; not necessarily everything
// that passes a is_numeric() check.)
//
// From the manual:
// "If the input arrays have the same string keys, then the later value
// for that key will overwrite the previous one. If, however, the arrays
// contain numeric keys, the later value will not overwrite the original

damncabbage

<?php

//
// Call a non-static function statically from another object,
// and $this is left set as if we were still in the calling function.
// 

class Foo {
    public function notStatic() {
        echo get_class($this)."\n";

damncabbage

<?php

$a = 'foo';
switch($a) {
  case 'bar'; // <-- Yes, that's a semi-colon.
    echo 'Stopped at bar.';
    break;
  case 'foo';
    echo 'Stopped at foo.';
    break;

damncabbage

#
# Regarding https://gist.github.com/1180947
# 
require 'test/unit'

# Example classes
class Animal; end

class Dog < Animal
  attr_accessor :name

damncabbage

#!/usr/bin/env ruby
#
# ruby dinner.rb [number-of-dinners]
#

require 'rubygems';
require 'open-uri';
require 'hpricot';

recipes = Integer(ARGV[0] || 5)

damncabbage

# This is me
user = magical_global_get_user_method
user.id # => 123

# This is what I want to change
business.find(123)
business.owner_id # => 456, belongs to someone else

# Choose an arbitrary record, deeply tied to a Business record.

damncabbage

require 'parslet'
require 'pp'

def parse(input)
  parser = SongParser.new
  begin
    tree = parser.parse(input)
  rescue Parslet::ParseFailed => error
    puts error, parser.root.error_tree
  end

damncabbage

class Article < ActiveRecord::Base
  # Has attributes: :title, :body, :active

  attr_protected :active
end

class Image < ActiveRecord::Base
  # Has attributes: :title, :filename, :active

  attr_accessible :title

damncabbage

sort_by = 'user' # For example

column_title = case sort_by
               when 'user'
                 proc { |x| x.name }
               when 'date'
                 proc { |x| x.date.strftime("%A, %e %B") }
               end