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Difference between revisions of "Template:Str/count/doc"
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(Created page with "Essentially {{tl|str/len}}, but counts the number of times {{{<nowiki/>1}}} appears in {{{<nowiki/>2}}}. Note that {{{<nowiki/>1}}} can be any Wikipedia:regular expression.") |
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Note that {{{<nowiki/>1}}} can be any [[Wikipedia:regular expression|regular expression]]. | Note that {{{<nowiki/>1}}} can be any [[Wikipedia:regular expression|regular expression]]. | ||
| + | |||
| + | ==Examples== | ||
| + | <pre>{{str/count|a|abca}}</pre> | ||
| + | → {{str/count|a|abca}} | ||
| + | |||
| + | <pre>{{str/count|\d|abc 123}}</pre> | ||
| + | → {{str/count|\d|abc 123}} | ||
| + | |||
| + | <pre>{{str/count|\D|abc 123}}</pre> | ||
| + | → {{str/count|\D|abc 123}} | ||
| + | |||
| + | <pre>{{str/count|\w+|this is an example}}</pre> | ||
| + | → {{str/count|\w+|this is an example}} (<code>\w+</code> matches one or more "word" characters, but not spaces) | ||
| + | |||
| + | <pre> {{str/count|\[\[[^]]+\]\]|This is text with a [[link]] and [[another link]].}}</pre> | ||
| + | → {{str/count|\[\[[^]]+\]\]|This is text with a [[link]] and [[another link]].}} | ||
| + | |||
| + | Breakdown of regular expression: | ||
| + | {| class="wikitable" | ||
| + | ! Section || Meaning || Explanation | ||
| + | |- | ||
| + | | <code>\[\[</code> | ||
| + | | <code>[[</code> | ||
| + | | Two ''literal'' <code>[</code> characters (note that <code>[</code> and <code>]</code> have a special meaning in regular expressions). | ||
| + | |- | ||
| + | | <code>[^]]</code> | ||
| + | | Any character that is not <code>]</code> | ||
| + | | A character class -- matches all characters listed between the brackets. The <code>^</code> is the negation operator, causing all characters ''not'' listed to be matched instead. In this case, the first <code>]</code> is the only character matched, since the second is the closing bracket. The first bracket is not treated as the closing bracket, since an empty character class is invalid. | ||
| + | |- | ||
| + | | <code>+</code> | ||
| + | | Allows one or more matches of the previous expression | ||
| + | | (in this case, it allows the non-<code>]</code> characters to be repeated) | ||
| + | |- | ||
| + | | <code>\]\]</code> | ||
| + | | <code>]]</code> | ||
| + | | Matches two literal <code>]</code> characters. | ||
| + | |} | ||
| + | <includeonly>[[Category:Templates]]</includeonly> | ||
| + | <noinclude>[[Category:Template Documentation]]</noinclude> | ||
Latest revision as of 17:30, 23 July 2013
Essentially {{str/len}}, but counts the number of times {{{1}}} appears in {{{2}}}.
Note that {{{1}}} can be any regular expression.
Examples[edit]
{{str/count|a|abca}}
→ 2
{{str/count|\d|abc 123}}
→ 3
{{str/count|\D|abc 123}}
→ 4
{{str/count|\w+|this is an example}}
→ 4 (\w+ matches one or more "word" characters, but not spaces)
{{str/count|\[\[[^]]+\]\]|This is text with a [[link]] and [[another link]].}}
→ 2
Breakdown of regular expression:
| Section | Meaning | Explanation |
|---|---|---|
\[\[
|
[[
|
Two literal [ characters (note that [ and ] have a special meaning in regular expressions).
|
[^]]
|
Any character that is not ]
|
A character class -- matches all characters listed between the brackets. The ^ is the negation operator, causing all characters not listed to be matched instead. In this case, the first ] is the only character matched, since the second is the closing bracket. The first bracket is not treated as the closing bracket, since an empty character class is invalid.
|
+
|
Allows one or more matches of the previous expression | (in this case, it allows the non-] characters to be repeated)
|
\]\]
|
]]
|
Matches two literal ] characters.
|