prosody
73399dd525e8
util/set.lua

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

Software / code / prosody

Annotate

util/set.lua @ 3736:73399dd525e8

util.serialization: Implemented deserialize().
author Waqas Hussain <waqas20@gmail.com>
date Sun, 12 Dec 2010 06:29:19 +0500
parent 3540:bc139431830b
child 4544:316e2b09a562
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: 1030
diff changeset
1 -- Prosody IM
2923
b7049746bd29 Update copyright headers for 2010
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
2 -- Copyright (C) 2008-2010 Matthew Wild
b7049746bd29 Update copyright headers for 2010
Matthew Wild <mwild1@gmail.com>
parents: 1522
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: 1030
diff changeset
4 --
569d58d21612 Add copyright header to those files missing one
Matthew Wild <mwild1@gmail.com>
parents: 1030
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: 1030
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: 1030
diff changeset
7 --
569d58d21612 Add copyright header to those files missing one
Matthew Wild <mwild1@gmail.com>
parents: 1030
diff changeset
8
3540
bc139431830b Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
9 local ipairs, pairs, setmetatable, next, tostring =
1028
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
10 ipairs, pairs, setmetatable, next, tostring;
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
11 local t_concat = table.concat;
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
12
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
13 module "set"
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
14
1028
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
15 local set_mt = {};
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
16 function set_mt.__call(set, _, k)
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
17 return next(set._items, k);
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
18 end
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
19 function set_mt.__add(set1, set2)
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
20 return _M.union(set1, set2);
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
21 end
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
22 function set_mt.__sub(set1, set2)
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
23 return _M.difference(set1, set2);
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
24 end
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
25 function set_mt.__div(set, func)
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
26 local new_set, new_items = _M.new();
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
27 local items, new_items = set._items, new_set._items;
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
28 for item in pairs(items) do
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
29 if func(item) then
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
30 new_items[item] = true;
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
31 end
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
32 end
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
33 return new_set;
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
34 end
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
35 function set_mt.__eq(set1, set2)
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
36 local set1, set2 = set1._items, set2._items;
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
37 for item in pairs(set1) do
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
38 if not set2[item] then
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
39 return false;
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
40 end
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
41 end
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
42
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
43 for item in pairs(set2) do
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
44 if not set1[item] then
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
45 return false;
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
46 end
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
47 end
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
48
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
49 return true;
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
50 end
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
51 function set_mt.__tostring(set)
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
52 local s, items = { }, set._items;
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
53 for item in pairs(items) do
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
54 s[#s+1] = tostring(item);
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
55 end
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
56 return t_concat(s, ", ");
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
57 end
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
58
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
59 local items_mt = {};
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
60 function items_mt.__call(items, _, k)
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
61 return next(items, k);
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
62 end
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
63
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
64 function new(list)
1028
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
65 local items = setmetatable({}, items_mt);
917
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
66 local set = { _items = items };
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
67
905
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
68 function set:add(item)
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
69 items[item] = true;
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
70 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
71
905
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
72 function set:contains(item)
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
73 return items[item];
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
74 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
75
905
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
76 function set:items()
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
77 return items;
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
78 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
79
905
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
80 function set:remove(item)
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
81 items[item] = nil;
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
82 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
83
905
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
84 function set:add_list(list)
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
85 for _, item in ipairs(list) do
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
86 items[item] = true;
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
87 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
88 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
89
905
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
90 function set:include(otherset)
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
91 for item in pairs(otherset) do
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
92 items[item] = true;
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
93 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
94 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
95
905
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
96 function set:exclude(otherset)
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
97 for item in pairs(otherset) do
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
98 items[item] = nil;
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
99 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
100 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
101
1029
4ead03974759 util.set: Add set:empty() to discover if the set is the empty set
Matthew Wild <mwild1@gmail.com>
parents: 1028
diff changeset
102 function set:empty()
4ead03974759 util.set: Add set:empty() to discover if the set is the empty set
Matthew Wild <mwild1@gmail.com>
parents: 1028
diff changeset
103 return not next(items);
4ead03974759 util.set: Add set:empty() to discover if the set is the empty set
Matthew Wild <mwild1@gmail.com>
parents: 1028
diff changeset
104 end
4ead03974759 util.set: Add set:empty() to discover if the set is the empty set
Matthew Wild <mwild1@gmail.com>
parents: 1028
diff changeset
105
905
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
106 if list then
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
107 set:add_list(list);
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
108 end
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
109
1028
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
110 return setmetatable(set, set_mt);
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
111 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
112
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
113 function union(set1, set2)
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
114 local set = new();
917
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
115 local items = set._items;
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
116
917
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
117 for item in pairs(set1._items) do
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
118 items[item] = true;
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
119 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
120
917
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
121 for item in pairs(set2._items) do
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
122 items[item] = true;
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
123 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
124
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
125 return set;
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
126 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
127
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
128 function difference(set1, set2)
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
129 local set = new();
917
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
130 local items = set._items;
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
131
917
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
132 for item in pairs(set1._items) do
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
133 items[item] = (not set2._items[item]) or nil;
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
134 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
135
917
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
136 return set;
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
137 end
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
138
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
139 function intersection(set1, set2)
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
140 local set = new();
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
141 local items = set._items;
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
142
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
143 set1, set2 = set1._items, set2._items;
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
144
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
145 for item in pairs(set1) do
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
146 items[item] = (not not set2[item]) or nil;
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
147 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
148
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
149 return set;
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
150 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
151
1030
a82268d507fc util.set: Add set.xor() to get a set consisting of items not in both sets
Matthew Wild <mwild1@gmail.com>
parents: 1029
diff changeset
152 function xor(set1, set2)
a82268d507fc util.set: Add set.xor() to get a set consisting of items not in both sets
Matthew Wild <mwild1@gmail.com>
parents: 1029
diff changeset
153 return union(set1, set2) - intersection(set1, set2);
a82268d507fc util.set: Add set.xor() to get a set consisting of items not in both sets
Matthew Wild <mwild1@gmail.com>
parents: 1029
diff changeset
154 end
a82268d507fc util.set: Add set.xor() to get a set consisting of items not in both sets
Matthew Wild <mwild1@gmail.com>
parents: 1029
diff changeset
155
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
156 return _M;