1 | function valuestokeys(tbl) |
2 | local tbl2 = {} |
3 | for _, v in pairs(tbl) do |
4 | tbl2[v] = true |
5 | end |
6 | return tbl2 |
7 | end |
8 | |
9 | function keystolist(tbl) |
10 | local tbl2 = {} |
11 | for k, _ in pairs(tbl) do |
12 | table.insert(tbl2, k) |
13 | end |
14 | return tbl2 |
15 | end |
16 | |
17 | -- iterate over values of an array |
18 | function all(t) |
19 | local i = 0 |
20 | local n = #t |
21 | return function () |
22 | i = i + 1 |
23 | if i <= n then return t[i] end |
24 | end |
25 | end |
test run test run with input download show line numbers
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Snippet ID: | #349 |
Snippet name: | Table functions (valuestokeys, keystolist, all) |
Eternal ID of this version: | #349/1 |
Text MD5: | 3504c79f98d8c271dcd27bf7d4acc341 |
Author: | stefan |
Category: | |
Type: | Lua code |
Public (visible to everyone): | Yes |
Archived (hidden from active list): | No |
Created/modified: | 2015-03-13 16:57:37 |
Source code size: | 422 bytes / 25 lines |
Pitched / IR pitched: | No / Yes |
Views / Downloads: | 825 / 230 |
Referenced in: | [show references] |