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String position.
Returns the index of the first occurrence of one string in another. Syntax | |
strpos (source searchstring [position])
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If searchstring is not found in source then zero (0) is returned.
Formal Declaration | |
strpos:u32 (source:str searchstring:str [position:u32=1])
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Parameters | |
- source
The string in which searchstring is to be found.
- searchstring
The string to be found in source. It may be either a single- or
double-quoted string literal, or a back-quoted regular expression.
- position
The character position in source where the search is to begin. If this
parameter is not specified, the search starts at the first character.
If this value is greater than the size of the source string, a zero result
is returned.
Examples | |
$nmdebug > var source "Oh where oh where has my little dog gone"
$nmdebug > var searchstring "where"
$nmdebug > var first = strpos(source, searchstring)
$nmdebug > wl first
$4
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Look for the string "where" in the source string and print the position where
it was found.
$nmdebug > first = first + strlen(searchstring)
$nmdebug > var second = strpos(source, searchstring, first)
$nmdebug > wl second
$d
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Look for the next occurrence of "where" in the source string and print the
position where it was found.
$nmdebug > second = second + strlen(searchstring)
$nmdebug > var third = strpos(source, searchstring, second)
$nmdebug > wl third
#0
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Look for another occurrence of "where" in the source string. Since the
search string is not found, the value of zero (0) is returned.
Limitations, Restrictions | |
none |
