prosody
bd0ff8ae98a8
util/iterators.lua

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util/iterators.lua @ 5776:bd0ff8ae98a8

Remove all trailing whitespace
author Florian Zeitz <florob@babelmonkeys.de>
date Fri, 09 Aug 2013 17:48:21 +0200
parent 5583:78dbece77ce8
child 7184:dedc6bf180e2
comparison
equal deleted inserted replaced
5775:a6c2b8933507 5776:bd0ff8ae98a8
1 -- Prosody IM 1 -- Prosody IM
2 -- Copyright (C) 2008-2010 Matthew Wild 2 -- Copyright (C) 2008-2010 Matthew Wild
3 -- Copyright (C) 2008-2010 Waqas Hussain 3 -- Copyright (C) 2008-2010 Waqas Hussain
4 -- 4 --
5 -- This project is MIT/X11 licensed. Please see the 5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information. 6 -- COPYING file in the source package for more information.
7 -- 7 --
8 8
9 --[[ Iterators ]]-- 9 --[[ Iterators ]]--
23 local ret = { f(s, var) }; 23 local ret = { f(s, var) };
24 var = ret[1]; 24 var = ret[1];
25 if var == nil then break; end 25 if var == nil then break; end
26 t_insert(results, 1, ret); 26 t_insert(results, 1, ret);
27 end 27 end
28 28
29 -- Then return our reverse one 29 -- Then return our reverse one
30 local i,max = 0, #results; 30 local i,max = 0, #results;
31 return function (results) 31 return function (results)
32 if i<max then 32 if i<max then
33 i = i + 1; 33 i = i + 1;
54 end 54 end
55 55
56 -- Given an iterator, iterate only over unique items 56 -- Given an iterator, iterate only over unique items
57 function it.unique(f, s, var) 57 function it.unique(f, s, var)
58 local set = {}; 58 local set = {};
59 59
60 return function () 60 return function ()
61 while true do 61 while true do
62 local ret = pack(f(s, var)); 62 local ret = pack(f(s, var));
63 var = ret[1]; 63 var = ret[1];
64 if var == nil then break; end 64 if var == nil then break; end
71 end 71 end
72 72
73 --[[ Return the number of items an iterator returns ]]-- 73 --[[ Return the number of items an iterator returns ]]--
74 function it.count(f, s, var) 74 function it.count(f, s, var)
75 local x = 0; 75 local x = 0;
76 76
77 while true do 77 while true do
78 var = f(s, var); 78 var = f(s, var);
79 if var == nil then break; end 79 if var == nil then break; end
80 x = x + 1; 80 x = x + 1;
81 end 81 end
82 82
83 return x; 83 return x;
84 end 84 end
85 85
86 -- Return the first n items an iterator returns 86 -- Return the first n items an iterator returns
87 function it.head(n, f, s, var) 87 function it.head(n, f, s, var)