note
tobyink
<blockquote>
<p><i><c>
my $left=$_[0];
my $right=$_[1];
</c></i></p>
<p><i>which is the same as</i></p>
<p><i><c>
my $left = shift @_;
my $right = shift @_;
</c></i></p>
</blockquote>
<p>It is not the same at all. The first version doesn't modify <c>@_</c>. The second one does modify it. The difference is often very important. (For example, if you're planning on using <c>goto</c>.)</p>
<code>
use Test::More;
use Data::Dumper;
sub func1 {
my $left=$_[0];
my $right=$_[1];
goto \&Data::Dumper::Dumper;
}
sub func2 {
my $left = shift @_;
my $right = shift @_;
goto \&Data::Dumper::Dumper;
}
my @args = qw( a b );
# Are they the same??
is(
func1(@args),
func2(@args),
"they're the same!",
);
done_testing();
</code>
<!-- Node text goes above. Div tags should contain sig only -->
<div class="pmsig"><div class="pmsig-757127">
<small><small>
<tt>perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'
</tt></small></small>
</div></div>
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