-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
---
+--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local t_insert, t_sort, t_remove, t_concat
= table.insert, table.sort, table.remove, table.concat;
+local setmetatable = setmetatable;
+local math_random = math.random;
+local math_floor = math.floor;
+local pairs, ipairs = pairs, ipairs;
+local tostring = tostring;
+
local array = {};
local array_base = {};
local array_methods = {};
-local array_mt = { __index = array_methods, __tostring = function (array) return array:concat(", "); end };
+local array_mt = { __index = array_methods, __tostring = function (array) return "{"..array:concat(", ").."}"; end };
-local function new_array(_, t)
+local function new_array(self, t, _s, _var)
+ if type(t) == "function" then -- Assume iterator
+ t = self.collect(t, _s, _var);
+ end
return setmetatable(t or {}, array_mt);
end
-- Read-only methods
function array_methods:random()
- return self[math.random(1,#self)];
+ return self[math_random(1,#self)];
end
-- These methods can be called two ways:
write = write + 1;
end
end
-
+
if inplace and write <= start_length then
for i=write,start_length do
outa[i] = nil;
end
end
-
+
return outa;
end
return outa;
end
+function array_base.reverse(outa, ina)
+ local len = #ina;
+ if ina == outa then
+ local middle = math_floor(len/2);
+ len = len + 1;
+ local o; -- opposite
+ for i = 1, middle do
+ o = len - i;
+ outa[i], outa[o] = outa[o], outa[i];
+ end
+ else
+ local off = len + 1;
+ for i = 1, len do
+ outa[i] = ina[off - i];
+ end
+ end
+ return outa;
+end
+
--- These methods only mutate the array
function array_methods:shuffle(outa, ina)
local len = #self;
for i=1,#self do
- local r = math.random(i,len);
+ local r = math_random(i,len);
self[i], self[r] = self[r], self[i];
end
return self;
end
-function array_methods:reverse()
- local len = #self-1;
- for i=len,1,-1 do
- self:push(self[i]);
- self:pop(i);
- end
- return self;
-end
-
function array_methods:append(array)
local len,len2 = #self, #array;
for i=1,len2 do
end
function array_methods:push(x)
- table.insert(self, x);
+ t_insert(self, x);
+ return self;
end
function array_methods:pop(x)
local v = self[x];
- table.remove(self, x);
+ t_remove(self, x);
return v;
end
function array_methods:concat(sep)
- return table.concat(array.map(self, tostring), sep);
+ return t_concat(array.map(self, tostring), sep);
end
function array_methods:length()
while true do
var = f(s, var);
if var == nil then break; end
- table.insert(t, var);
+ t_insert(t, var);
end
return setmetatable(t, array_mt);
end