Here's a popular use of the list context:
sub foo {
my ( $x, $y, $z ) = @_;
# ...
}
You can mix scalars with other types:
sub say {
my ( $x, %param ) = @_;
# ...
}
&say( "Hello", name => "world" );
The following example won't work as you could expect, because all the arrays will be flatenned into the same one:
sub bar {
my ( @a, @b ) = @_; # wrong!
# ...
}
&bar( @array1, @array2 ); # wrong!
The solution is to use references, but we still can use the list context:
sub bar {
my ( $a_ref, $b_ref ) = @_; # ok
# ...
}
&bar( \@array1, \@array2 ); # ok
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Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
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horizontal scrolling (and possible janitor
intervention).
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or How to display code and escape characters
are good places to start.