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util.array: Expose array.* functions, to be used for unwrapped arrays

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This commit is contained in:
Matthew Wild 2009-03-26 03:55:45 +00:00
parent 996a74ba94
commit 3ab003a514
1 changed files with 14 additions and 12 deletions
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26
util/array.lua
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@ -1,11 +1,13 @@
local array_methods = {};
local array_mt = { __index = array_methods, __tostring = function (array) return array:concat(", "); end };
local array = {};
local function array(t)
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_methods:map(func, t2)
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);
@ -13,7 +15,7 @@ function array_methods:map(func, t2)
return t2;
end
function array_methods:filter(func, t2)
function array:filter(func, t2)
local t2 = t2 or array{};
for k,v in ipairs(self) do
if func(v) then
@ -24,17 +26,17 @@ function array_methods:filter(func, 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
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_methods:random()
function array:random()
return self[math.random(1,#self)];
end
function array_methods:shuffle()
function array:shuffle()
local len = #self;
for i=1,#self do
local r = math.random(i,len);