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Apr 252010

eq vs == in Perl


1. eq

It perform string comparison.

my $foo = "123";
my $bar = "123";

print $foo eq $bar; # output "1"

2. ==

It perform numeric comparison, string is first converted to numeric value before compare.

my $foo = "foo";
my $bar = "bar";

print $foo == $bar; # output "1", since 0 = 0 as strings are converted to 0 in both variables

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