prosody
ca74d8ed1a15
util/array.lua

Find changesets by keywords by author, files, the commit message, revision number or hash, or revset expression.

Software / code / prosody

Annotate

util/array.lua @ 4449:ca74d8ed1a15

util.array: Avoid globals.
author Waqas Hussain <waqas20@gmail.com>
date Fri, 09 Dec 2011 12:02:21 +0500
parent 4448:d745f4c28294
child 5085:cbc7eb5cfa8c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1522
569d58d21612 Add copyright header to those files missing one
Matthew Wild <mwild1@gmail.com>
parents: 1373
diff changeset
1 -- Prosody IM
2923
b7049746bd29 Update copyright headers for 2010
Matthew Wild <mwild1@gmail.com>
parents: 1934
diff changeset
2 -- Copyright (C) 2008-2010 Matthew Wild
b7049746bd29 Update copyright headers for 2010
Matthew Wild <mwild1@gmail.com>
parents: 1934
diff changeset
3 -- Copyright (C) 2008-2010 Waqas Hussain
1522
569d58d21612 Add copyright header to those files missing one
Matthew Wild <mwild1@gmail.com>
parents: 1373
diff changeset
4 --
569d58d21612 Add copyright header to those files missing one
Matthew Wild <mwild1@gmail.com>
parents: 1373
diff changeset
5 -- This project is MIT/X11 licensed. Please see the
569d58d21612 Add copyright header to those files missing one
Matthew Wild <mwild1@gmail.com>
parents: 1373
diff changeset
6 -- COPYING file in the source package for more information.
569d58d21612 Add copyright header to those files missing one
Matthew Wild <mwild1@gmail.com>
parents: 1373
diff changeset
7 --
569d58d21612 Add copyright header to those files missing one
Matthew Wild <mwild1@gmail.com>
parents: 1373
diff changeset
8
3540
bc139431830b Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
9 local t_insert, t_sort, t_remove, t_concat
bc139431830b Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
10 = table.insert, table.sort, table.remove, table.concat;
918
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
11
4449
ca74d8ed1a15 util.array: Avoid globals.
Waqas Hussain <waqas20@gmail.com>
parents: 4448
diff changeset
12 local setmetatable = setmetatable;
ca74d8ed1a15 util.array: Avoid globals.
Waqas Hussain <waqas20@gmail.com>
parents: 4448
diff changeset
13 local math_random = math.random;
ca74d8ed1a15 util.array: Avoid globals.
Waqas Hussain <waqas20@gmail.com>
parents: 4448
diff changeset
14 local pairs, ipairs = pairs, ipairs;
ca74d8ed1a15 util.array: Avoid globals.
Waqas Hussain <waqas20@gmail.com>
parents: 4448
diff changeset
15 local tostring = tostring;
ca74d8ed1a15 util.array: Avoid globals.
Waqas Hussain <waqas20@gmail.com>
parents: 4448
diff changeset
16
1905
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
17 local array = {};
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
18 local array_base = {};
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
19 local array_methods = {};
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
20 local array_mt = { __index = array_methods, __tostring = function (array) return array:concat(", "); end };
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
21
920
e302cbc9d036 util.array: Expose array.* functions, to be used for unwrapped arrays
Matthew Wild <mwild1@gmail.com>
parents: 918
diff changeset
22 local function new_array(_, t)
918
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
23 return setmetatable(t or {}, array_mt);
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
24 end
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
25
1373
120275376bbb util.array: Add support for + operator to create a new array from two arrays joined
Matthew Wild <mwild1@gmail.com>
parents: 1372
diff changeset
26 function array_mt.__add(a1, a2)
120275376bbb util.array: Add support for + operator to create a new array from two arrays joined
Matthew Wild <mwild1@gmail.com>
parents: 1372
diff changeset
27 local res = new_array();
120275376bbb util.array: Add support for + operator to create a new array from two arrays joined
Matthew Wild <mwild1@gmail.com>
parents: 1372
diff changeset
28 return res:append(a1):append(a2);
120275376bbb util.array: Add support for + operator to create a new array from two arrays joined
Matthew Wild <mwild1@gmail.com>
parents: 1372
diff changeset
29 end
120275376bbb util.array: Add support for + operator to create a new array from two arrays joined
Matthew Wild <mwild1@gmail.com>
parents: 1372
diff changeset
30
920
e302cbc9d036 util.array: Expose array.* functions, to be used for unwrapped arrays
Matthew Wild <mwild1@gmail.com>
parents: 918
diff changeset
31 setmetatable(array, { __call = new_array });
e302cbc9d036 util.array: Expose array.* functions, to be used for unwrapped arrays
Matthew Wild <mwild1@gmail.com>
parents: 918
diff changeset
32
4440
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
33 -- Read-only methods
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
34 function array_methods:random()
4449
ca74d8ed1a15 util.array: Avoid globals.
Waqas Hussain <waqas20@gmail.com>
parents: 4448
diff changeset
35 return self[math_random(1,#self)];
4440
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
36 end
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
37
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
38 -- These methods can be called two ways:
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
39 -- array.method(existing_array, [params [, ...]]) -- Create new array for result
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
40 -- existing_array:method([params, ...]) -- Transform existing array into result
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
41 --
1905
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
42 function array_base.map(outa, ina, func)
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
43 for k,v in ipairs(ina) do
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
44 outa[k] = func(v);
918
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
45 end
1905
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
46 return outa;
918
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
47 end
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
48
1905
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
49 function array_base.filter(outa, ina, func)
1915
e9d5406caf8c util.array: Fix for array:filter() (in-place filtering)
Matthew Wild <mwild1@gmail.com>
parents: 1905
diff changeset
50 local inplace, start_length = ina == outa, #ina;
e9d5406caf8c util.array: Fix for array:filter() (in-place filtering)
Matthew Wild <mwild1@gmail.com>
parents: 1905
diff changeset
51 local write = 1;
e9d5406caf8c util.array: Fix for array:filter() (in-place filtering)
Matthew Wild <mwild1@gmail.com>
parents: 1905
diff changeset
52 for read=1,start_length do
e9d5406caf8c util.array: Fix for array:filter() (in-place filtering)
Matthew Wild <mwild1@gmail.com>
parents: 1905
diff changeset
53 local v = ina[read];
918
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
54 if func(v) then
1915
e9d5406caf8c util.array: Fix for array:filter() (in-place filtering)
Matthew Wild <mwild1@gmail.com>
parents: 1905
diff changeset
55 outa[write] = v;
e9d5406caf8c util.array: Fix for array:filter() (in-place filtering)
Matthew Wild <mwild1@gmail.com>
parents: 1905
diff changeset
56 write = write + 1;
918
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
57 end
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
58 end
1915
e9d5406caf8c util.array: Fix for array:filter() (in-place filtering)
Matthew Wild <mwild1@gmail.com>
parents: 1905
diff changeset
59
1922
d5fe0f9b377a util.array: Small logic fix for array:filter()
Matthew Wild <mwild1@gmail.com>
parents: 1915
diff changeset
60 if inplace and write <= start_length then
1915
e9d5406caf8c util.array: Fix for array:filter() (in-place filtering)
Matthew Wild <mwild1@gmail.com>
parents: 1905
diff changeset
61 for i=write,start_length do
e9d5406caf8c util.array: Fix for array:filter() (in-place filtering)
Matthew Wild <mwild1@gmail.com>
parents: 1905
diff changeset
62 outa[i] = nil;
e9d5406caf8c util.array: Fix for array:filter() (in-place filtering)
Matthew Wild <mwild1@gmail.com>
parents: 1905
diff changeset
63 end
e9d5406caf8c util.array: Fix for array:filter() (in-place filtering)
Matthew Wild <mwild1@gmail.com>
parents: 1905
diff changeset
64 end
e9d5406caf8c util.array: Fix for array:filter() (in-place filtering)
Matthew Wild <mwild1@gmail.com>
parents: 1905
diff changeset
65
1905
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
66 return outa;
918
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
67 end
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
68
1905
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
69 function array_base.sort(outa, ina, ...)
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
70 if ina ~= outa then
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
71 outa:append(ina);
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
72 end
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
73 t_sort(outa, ...);
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
74 return outa;
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
75 end
918
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
76
4439
1c8d2c0d02db util.array: Add pluck() method to pick a given property from each item
Matthew Wild <mwild1@gmail.com>
parents: 4387
diff changeset
77 function array_base.pluck(outa, ina, key)
1c8d2c0d02db util.array: Add pluck() method to pick a given property from each item
Matthew Wild <mwild1@gmail.com>
parents: 4387
diff changeset
78 for i=1,#ina do
1c8d2c0d02db util.array: Add pluck() method to pick a given property from each item
Matthew Wild <mwild1@gmail.com>
parents: 4387
diff changeset
79 outa[i] = ina[i][key];
1c8d2c0d02db util.array: Add pluck() method to pick a given property from each item
Matthew Wild <mwild1@gmail.com>
parents: 4387
diff changeset
80 end
1c8d2c0d02db util.array: Add pluck() method to pick a given property from each item
Matthew Wild <mwild1@gmail.com>
parents: 4387
diff changeset
81 return outa;
1c8d2c0d02db util.array: Add pluck() method to pick a given property from each item
Matthew Wild <mwild1@gmail.com>
parents: 4387
diff changeset
82 end
1c8d2c0d02db util.array: Add pluck() method to pick a given property from each item
Matthew Wild <mwild1@gmail.com>
parents: 4387
diff changeset
83
4440
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
84 --- These methods only mutate the array
1905
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
85 function array_methods:shuffle(outa, ina)
918
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
86 local len = #self;
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
87 for i=1,#self do
4449
ca74d8ed1a15 util.array: Avoid globals.
Waqas Hussain <waqas20@gmail.com>
parents: 4448
diff changeset
88 local r = math_random(i,len);
918
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
89 self[i], self[r] = self[r], self[i];
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
90 end
1372
3b13bb57002e util.array: Make array:reverse() and array:shuffle() return the array to allow chaining
Matthew Wild <mwild1@gmail.com>
parents: 1371
diff changeset
91 return self;
918
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
92 end
967edf874df7 util.array: New array library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
93
1905
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
94 function array_methods:reverse()
922
0e45234360cd util.array: Add :reverse() method
Matthew Wild <mwild1@gmail.com>
parents: 920
diff changeset
95 local len = #self-1;
0e45234360cd util.array: Add :reverse() method
Matthew Wild <mwild1@gmail.com>
parents: 920
diff changeset
96 for i=len,1,-1 do
0e45234360cd util.array: Add :reverse() method
Matthew Wild <mwild1@gmail.com>
parents: 920
diff changeset
97 self:push(self[i]);
0e45234360cd util.array: Add :reverse() method
Matthew Wild <mwild1@gmail.com>
parents: 920
diff changeset
98 self:pop(i);
0e45234360cd util.array: Add :reverse() method
Matthew Wild <mwild1@gmail.com>
parents: 920
diff changeset
99 end
1372
3b13bb57002e util.array: Make array:reverse() and array:shuffle() return the array to allow chaining
Matthew Wild <mwild1@gmail.com>
parents: 1371
diff changeset
100 return self;
922
0e45234360cd util.array: Add :reverse() method
Matthew Wild <mwild1@gmail.com>
parents: 920
diff changeset
101 end
0e45234360cd util.array: Add :reverse() method
Matthew Wild <mwild1@gmail.com>
parents: 920
diff changeset
102
1905
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
103 function array_methods:append(array)
1371
9e45bdf55353 util.array: Add array:append() method, to append a new array to an existing one
Matthew Wild <mwild1@gmail.com>
parents: 1027
diff changeset
104 local len,len2 = #self, #array;
9e45bdf55353 util.array: Add array:append() method, to append a new array to an existing one
Matthew Wild <mwild1@gmail.com>
parents: 1027
diff changeset
105 for i=1,len2 do
9e45bdf55353 util.array: Add array:append() method, to append a new array to an existing one
Matthew Wild <mwild1@gmail.com>
parents: 1027
diff changeset
106 self[len+i] = array[i];
9e45bdf55353 util.array: Add array:append() method, to append a new array to an existing one
Matthew Wild <mwild1@gmail.com>
parents: 1027
diff changeset
107 end
9e45bdf55353 util.array: Add array:append() method, to append a new array to an existing one
Matthew Wild <mwild1@gmail.com>
parents: 1027
diff changeset
108 return self;
9e45bdf55353 util.array: Add array:append() method, to append a new array to an existing one
Matthew Wild <mwild1@gmail.com>
parents: 1027
diff changeset
109 end
9e45bdf55353 util.array: Add array:append() method, to append a new array to an existing one
Matthew Wild <mwild1@gmail.com>
parents: 1027
diff changeset
110
4440
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
111 function array_methods:push(x)
4449
ca74d8ed1a15 util.array: Avoid globals.
Waqas Hussain <waqas20@gmail.com>
parents: 4448
diff changeset
112 t_insert(self, x);
4448
d745f4c28294 util.array: Make array:push() chainable.
Waqas Hussain <waqas20@gmail.com>
parents: 4440
diff changeset
113 return self;
4440
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
114 end
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
115
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
116 function array_methods:pop(x)
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
117 local v = self[x];
4449
ca74d8ed1a15 util.array: Avoid globals.
Waqas Hussain <waqas20@gmail.com>
parents: 4448
diff changeset
118 t_remove(self, x);
4440
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
119 return v;
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
120 end
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
121
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
122 function array_methods:concat(sep)
4449
ca74d8ed1a15 util.array: Avoid globals.
Waqas Hussain <waqas20@gmail.com>
parents: 4448
diff changeset
123 return t_concat(array.map(self, tostring), sep);
4440
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
124 end
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
125
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
126 function array_methods:length()
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
127 return #self;
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested
Matthew Wild <mwild1@gmail.com>
parents: 4439
diff changeset
128 end
1905
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
129
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
130 --- These methods always create a new array
1027
fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name
Matthew Wild <mwild1@gmail.com>
parents: 922
diff changeset
131 function array.collect(f, s, var)
4387
06161b0b83f2 util.array: Fix array.collect() for iterators that expect initial value of var to be preserved
Matthew Wild <mwild1@gmail.com>
parents: 3540
diff changeset
132 local t = {};
1027
fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name
Matthew Wild <mwild1@gmail.com>
parents: 922
diff changeset
133 while true do
fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name
Matthew Wild <mwild1@gmail.com>
parents: 922
diff changeset
134 var = f(s, var);
fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name
Matthew Wild <mwild1@gmail.com>
parents: 922
diff changeset
135 if var == nil then break; end
4449
ca74d8ed1a15 util.array: Avoid globals.
Waqas Hussain <waqas20@gmail.com>
parents: 4448
diff changeset
136 t_insert(t, var);
1027
fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name
Matthew Wild <mwild1@gmail.com>
parents: 922
diff changeset
137 end
fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name
Matthew Wild <mwild1@gmail.com>
parents: 922
diff changeset
138 return setmetatable(t, array_mt);
fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name
Matthew Wild <mwild1@gmail.com>
parents: 922
diff changeset
139 end
fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name
Matthew Wild <mwild1@gmail.com>
parents: 922
diff changeset
140
1905
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
141 ---
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
142
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
143 -- Setup methods from array_base
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
144 for method, f in pairs(array_base) do
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
145 local base_method = f;
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
146 -- Setup global array method which makes new array
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
147 array[method] = function (old_a, ...)
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
148 local a = new_array();
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
149 return base_method(a, old_a, ...);
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
150 end
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
151 -- Setup per-array (mutating) method
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
152 array_methods[method] = function (self, ...)
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
153 return base_method(self, self, ...);
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
154 end
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
155 end
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
156
1027
fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name
Matthew Wild <mwild1@gmail.com>
parents: 922
diff changeset
157 _G.array = array;
fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name
Matthew Wild <mwild1@gmail.com>
parents: 922
diff changeset
158 module("array");
fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name
Matthew Wild <mwild1@gmail.com>
parents: 922
diff changeset
159
fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name
Matthew Wild <mwild1@gmail.com>
parents: 922
diff changeset
160 return array;