substring-before()
substring-before()
The substring-before function returns a string that is the rest of a given string before a given substring.
Syntax
substring-before( haystack , needle )
Arguments
-
haystack - The string to be evaluated. Part of this string will be returned.
-
needle - The substring to search for. Everything before the first occurance of
needleinhaystackwill be returned.
Returns
A string.
Examples
| XPath Example | Output |
|---|---|
substring-before('aa-bb','-') | aa |
substring-before('aa-bb','a') | (empty string) |
substring-before('aa-bb','b') | aa- |
substring-before('aa-bb','q') | (empty string) |
Defined
Gecko support
Supported.
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/XPath/Functions/substring-before
