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ABBREV(<longstring>,<shortstring>,[<length>])
returns boolean value
Returns 1 if <shortstring> is equal to the leading characters of
<longstring>. If <length> is specified, then <shortstring> must also be at
least that long. The comparison is case-sensitive. If <length> is not
specified, an empty string will always match <longstring>.
Returns 0 if either condition is not met.
Examples:
say abbrev('Waldorf','Waldo'); >>> 1
say abbrev('Waldorf','WALDO'); >>> 0
say abbrev( upper('Waldorf') , 'WALDO'); >>> 1
Also see
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