Difference between revisions of "String.gmatch"
From GiderosMobile
| Line 1: | Line 1: | ||
__NOTOC__ | __NOTOC__ | ||
'''<translate>Available since</translate>:''' Gideros 2011.6<br/> | '''<translate>Available since</translate>:''' Gideros 2011.6<br/> | ||
| + | '''<translate>Class</translate>:''' [[Special:MyLanguage/string|string]]<br/> | ||
=== <translate>Description</translate> === | === <translate>Description</translate> === | ||
<translate>Returns an iterator function that, each time it is called, returns the next captures from pattern over string s. If pattern specifies no captures, then the whole match is produced in each call. | <translate>Returns an iterator function that, each time it is called, returns the next captures from pattern over string s. If pattern specifies no captures, then the whole match is produced in each call. | ||
| Line 7: | Line 8: | ||
As an example, the following loop | As an example, the following loop | ||
| − | + | `s = "hello world from Lua"` | |
| − | + | `for w in string.gmatch(s, "%a+") do` | |
| − | + | `print(w)` | |
| − | + | `end` | |
</pre> | </pre> | ||
will iterate over all the words from string s, printing one per line. The next example collects all pairs key=value from the given string into a table: | will iterate over all the words from string s, printing one per line. The next example collects all pairs key=value from the given string into a table: | ||
| − | + | `t = {}` | |
| − | + | `s = "from=world, to=Lua"` | |
| − | + | `for k, v in string.gmatch(s, "(%w+)=(%w+)") do` | |
| − | + | `t[k] = v` | |
| − | + | `end` | |
Revision as of 09:28, 24 August 2018
Available since: Gideros 2011.6
Class: string
Description
Returns an iterator function that, each time it is called, returns the next captures from pattern over string s. If pattern specifies no captures, then the whole match is produced in each call.
As an example, the following loop
`s = "hello world from Lua"`
`for w in string.gmatch(s, "%a+") do`
`print(w)`
`end`
will iterate over all the words from string s, printing one per line. The next example collects all pairs key=value from the given string into a table:
`t = {}`
`s = "from=world, to=Lua"`
`for k, v in string.gmatch(s, "(%w+)=(%w+)") do`
`t[k] = v`
`end`
For this function, a '^' at the start of a pattern does not work as an anchor, as this would prevent the iteration.
(function) = string.gmatch(s,pat)
Parameters
s: (string) string where to look for patterns
pat: (string) pattern to look for
Return values
Returns (function) iterator function
