Sounds like homework, but here's a tip.
my $i = index reverse($phrase),$what;
updated: ()
meh. that's not good ofcourse. I
think this works ok:
use strict;
print join(",",rindexes("hello world , kill bill","ll"));
sub rindexes {
my $s = reverse shift;
my $what = reverse shift;
my @indexes;
my $old = 0;
while ((my $i = index $s,$what,$old) > -1) {
push @indexes, length($s) - $i - length($what) +1;
$old = $i+1;
}
@indexes;
}
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