perl closures and $_

Question

One of the first things I try to learn in an unfamiliar programming language is how it handles closures. Their semantics are often intertwined with how the language handles scop

Answer 1

$_ is a global variable and should not be used in closure. Before using it assign this to a lexically scoped variable as shown bewlow. This will produce expected o/p.

#!/usr/bin/perl -w

use strict;
my @closures;


foreach (1..3) {
   my $var = $_;
   push @closures, sub { print "I will remember $var"; };
}

foreach (@closures) {
  $_->();
  print "\n";
}