Programming language comparison

From WhyNotWiki

	[Ruby (category)]	[JavaScript (category)]	[PHP (category)]	[Python (category)]	[Smalltalk (category)]	[Java (category)]
	Array.new(...)	new Array(...)
	self	this	$this
	to_s	toString()
Iterators
	map	map() (>=1.6)
	select	filter()
	each	forEach
	any?	some
	every?	all
Strings
	string.split	string.split()
	array.join(separator)	array.join(separator)
	string.downcase	string.toLowerCase()
...
		function(x) x * x (>=1.8)		lambda x: x * x	x * x ]
		nodes.inject([], function(total, node) total.concat(node.childNodes)); (Prototype) or reduce (JS >=1.8)		reduce