Amit Saxena wrote:
>
> I could be a very basic question but I am unable to find any answers on
> internet.
>
> What's the difference between "=>" and ">=" in Perl ?
>
> To the best of my knowledge, ">=" means greater than or equal to and "=>" is
> just used instead of comma to distinguish between key and values while
> assigning a hash.
>
> I am unable to justify the output of the following program (for "=>"
> operator)
[snip]
> if ($i => 5)
> {
> print "\nInside If";
> }
> else
> {
> print "\nInside Else";
> }
>
> print "\n";
> $ perl y.pl
> Useless use of private variable in void context at y.pl line 26.
>
> Inside If
=> is exactly equivalent to a comma, everywhere, except that it has the added
effect that it quotes a bareword value preceding it, so
print XX => $_ => "\n";
is the same as
print 'XX', $_, "\n";
so your conditional statement is
if ($i, 5) { ... }
which evaluates $i and throws it away (hence your warning) and then evaluates 5,
which is true.
HTH,
Rob
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