$ perl -E '
my @x = qw{ABC DEF BXB};
my ($i, $c) = qw{1 B};
for (@x) {
say "$_: ", $i == index($_, $c, $i) ? "YES" : "NO";
say "$_: ", $c eq substr($_, $i, 1) ? "YES" : "NO";
}
'
ABC: YES
ABC: YES
DEF: NO
DEF: NO
BXB: NO
BXB: NO
####
#!/usr/bin/env perl
use strict;
use warnings;
use Benchmark 'cmpthese';
my @x = qw{ABC DEF BXB};
my ($i, $c) = qw{1 B};
cmpthese 0 => {
index => sub { $i == index($_, $c, $i) ? 1 : 0 for @x },
substr => sub { $c eq substr($_, $i, 1) ? 1 : 0 for @x },
};
##
##
Rate substr index
substr 3981142/s -- -46%
index 7383385/s 85% --