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Method has_index()
- Method
has_index
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int has_index(string haystack, int index)
int has_index(array haystack, int index)
int has_index(mapping|multiset|object|program haystack, mixed index)
- Description
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Search for index in haystack .
- Returns
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Returns 1 if index is in the index domain of haystack ,
or 0 (zero) if not found.
This function is equivalent to (but sometimes faster than):
search(indices(haystack), index) != -1
- Note
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A negative index in strings and arrays as recognized by the
index operators `[]() and `[]=() is not considered
a proper index by has_index()
- See also
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has_value() , indices() , search() , values() , zero_type()
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