As does Perl with `$[`[0][1] [0] "This variable stores the index of the first element in an array, and of the first character in a substring." [1] With the ca

As does Perl with `$[`[0][1] [0] "This variable stores the index of the first element in an array, and of the first character in a substring." [1] With the caveat: 'As of Perl v5.30.0, or under "use v5.16", or "no feature "array_base"", $[ no longer has any effect"'