local array_methods = {};

local array_mt = { __index = array_methods, __tostring = function (array) return array:concat(", "); end };

local function array(t)

	return setmetatable(t or {}, array_mt);

end

function array_methods:map(func, t2)

	local t2 = t2 or array{};

	for k,v in ipairs(self) do

		t2[k] = func(v);

	end

	return t2;

end

function array_methods:filter(func, t2)

	local t2 = t2 or array{};

	for k,v in ipairs(self) do

		if func(v) then

			t2:push(v);

		end

	end

	return t2;

end

array_methods.push = table.insert;

array_methods.pop = table.remove;

array_methods.sort = table.sort;

array_methods.concat = table.concat;

array_methods.length = function (t) return #t; end

function array_methods:random()

	return self[math.random(1,#self)];

end

function array_methods:shuffle()

	local len = #self;

	for i=1,#self do

		local r = math.random(i,len);

		self[i], self[r] = self[r], self[i];

	end

end

_G.array = array