Difference between revisions of "String.gmatch"
From GiderosMobile
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__NOTOC__ | __NOTOC__ | ||
| + | '''<translate>Available since</translate>:''' Gideros 2011.6<br/> | ||
| + | '''<translate>Class</translate>:''' [[Special:MyLanguage/string|string]]<br/> | ||
| − | + | === Description === | |
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| − | === | ||
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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. | 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. | ||
| − | </ | + | <source lang="lua"> |
| + | (function) = string.gmatch(s,pat) | ||
| + | </source> | ||
| − | <translate> | + | === Parameters === |
| − | + | '''s''': (string) <translate>string where to look for patterns</translate><br/> | |
| − | </translate> | + | '''pat''': (string) <translate>pattern to look for</translate><br/> |
| − | + | === Return values === | |
| − | + | '''<translate>Returns</translate>''' (function) <translate>iterator function</translate><br/> | |
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| − | </ | ||
| − | + | === Examples === | |
| − | will iterate over all the words from string s, printing one per line | + | As an example, the following loop will iterate over all the words from string s, printing one per line: |
| − | < | + | <source lang="lua"> |
| − | + | s = "hello world from Lua" | |
| − | + | for w in string.gmatch(s, "%a+") do | |
| − | + | print(w) | |
| − | + | end | |
| − | + | </source> | |
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| − | </ | ||
| + | The next example collects all pairs key=value from the given string into a table: | ||
<source lang="lua"> | <source lang="lua"> | ||
| − | + | t = {} | |
| + | s = "from=world, to=Lua" | ||
| + | for k, v in string.gmatch(s, "(%w+)=(%w+)") do | ||
| + | t[k] = v | ||
| + | end | ||
</source> | </source> | ||
| − | + | For this function, a '^' at the start of a pattern does not work as an anchor, as this would prevent the iteration. | |
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| − | ' | ||
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{{String}} | {{String}} | ||
Revision as of 03:24, 24 August 2020
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.
(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
Examples
As an example, the following loop will iterate over all the words from string s, printing one per line:
s = "hello world from Lua"
for w in string.gmatch(s, "%a+") do
print(w)
end
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.
