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46. is_list_element


Test whether a delimited string contains a specific element


Integer_Type is_list_element (String_Type list, String_Type elem, Integer_Type delim)


The is_list_element function may be used to determine whether or not a delimited list of strings, list, contains the element elem. If elem is not an element of list, the function will return zero, otherwise, it returns 1 plus the matching element number.


The expression

     is_list_element ("element 0, element 1, element 2", "0,", ' ');
returns 2 since "0," is element number one of the list (numbered from zero).
See Also

extract_element, is_substr, create_delimited_string

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