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-- Prosody IM
-- Copyright (C) 2008-2009 Matthew Wild
-- Copyright (C) 2008-2009 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local array = {};
local array_mt = { __index = array, __tostring = function (array) return array:concat(", "); end };
local function new_array(_, t)
return setmetatable(t or {}, array_mt);
end
function array_mt.__add(a1, a2)
local res = new_array();
return res:append(a1):append(a2);
end
setmetatable(array, { __call = new_array });
function array: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: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.push = table.insert;
array.pop = table.remove;
array.sort = table.sort;
array.concat = table.concat;
array.length = function (t) return #t; end
function array:random()
return self[math.random(1,#self)];
end
function array:shuffle()
local len = #self;
for i=1,#self do
local r = math.random(i,len);
self[i], self[r] = self[r], self[i];
end
return self;
end
function array:reverse()
local len = #self-1;
for i=len,1,-1 do
self:push(self[i]);
self:pop(i);
end
return self;
end
function array:append(array)
local len,len2 = #self, #array;
for i=1,len2 do
self[len+i] = array[i];
end
return self;
end
function array.collect(f, s, var)
local t, var = {};
while true do
var = f(s, var);
if var == nil then break; end
table.insert(t, var);
end
return setmetatable(t, array_mt);
end
_G.array = array;
module("array");
return array;
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