NAME

Port of Perl's index() / rindex() built-ins

SYNOPSIS

use P5index; # exports index() / rindex()

say index("foobar", "bar");    # 3
  say index("foofoo", "foo", 1); # 3
  say index("foofoo", "bar");    # -1

say rindex("foobar", "bar");    # 3
  say rindex("foofoo", "foo", 4); # 3
  say rindex("foofoo", "bar");    # -1

DESCRIPTION

This module tries to mimic the behaviour of Perl's index / rindex built-ins as closely as possible in the Raku Programming Language.

ORIGINAL PERL 5 DOCUMENTATION

index STR,SUBSTR,POSITION
    index STR,SUBSTR
            The index function searches for one string within another, but
            without the wildcard-like behavior of a full regular-expression
            pattern match. It returns the position of the first occurrence of
            SUBSTR in STR at or after POSITION. If POSITION is omitted, starts
            searching from the beginning of the string. POSITION before the
            beginning of the string or after its end is treated as if it were
            the beginning or the end, respectively. POSITION and the return
            value are based at zero. If the substring is not found, "index"
            returns -1.

rindex STR,SUBSTR,POSITION
    rindex STR,SUBSTR
            Works just like index() except that it returns the position of the
            last occurrence of SUBSTR in STR. If POSITION is specified,
            returns the last occurrence beginning at or before that position.

AUTHOR

Elizabeth Mattijsen <[email protected]>

Source can be located at: https://github.com/lizmat/P5index . Comments and Pull Requests are welcome.

COPYRIGHT AND LICENSE

Copyright 2018, 2019, 2020, 2021 Elizabeth Mattijsen

Re-imagined from Perl as part of the CPAN Butterfly Plan.

This library is free software; you can redistribute it and/or modify it under the Artistic License 2.0.