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authorMatthew Wild <mwild1@gmail.com>2014-04-02 17:41:38 +0100
committerMatthew Wild <mwild1@gmail.com>2014-04-02 17:41:38 +0100
commitda820882348572de470a13a1a50f529a51243aa5 (patch)
tree39ca42dddf3935546a0c3c37b2e2456a554899f1 /util/array.lua
parent618661cda2a68afbe445ce079c15af25bdaa177b (diff)
parentf7d4b04bf17c8b634eae00e814a995a88c5ba6cb (diff)
downloadprosody-da820882348572de470a13a1a50f529a51243aa5.tar.gz
prosody-da820882348572de470a13a1a50f529a51243aa5.zip
Merge 0.9->0.10
Diffstat (limited to 'util/array.lua')
-rw-r--r--util/array.lua35
1 files changed, 23 insertions, 12 deletions
diff --git a/util/array.lua b/util/array.lua
index 2d58e7fb..6f2abe04 100644
--- a/util/array.lua
+++ b/util/array.lua
@@ -1,7 +1,7 @@
-- 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.
--
@@ -11,6 +11,7 @@ local t_insert, t_sort, t_remove, t_concat
local setmetatable = setmetatable;
local math_random = math.random;
+local math_floor = math.floor;
local pairs, ipairs = pairs, ipairs;
local tostring = tostring;
@@ -59,13 +60,13 @@ function array_base.filter(outa, ina, func)
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
@@ -84,6 +85,25 @@ function array_base.pluck(outa, ina, key)
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;
@@ -94,15 +114,6 @@ function array_methods:shuffle(outa, ina)
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