Hi unixhome,

I usually prefer to receive subroutine arguments with: 

my ($var1, $var2, $parray) = @_;

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because it lets me add or remove arguments easily.  The one trick is that, even with a single parameter, you can't remove the parentheses on the left side of the assignment, because it would use @_ in scalar context instead!

In your original code, you've omitted the '$' sigil on your variables, which you need to supply.

Also, note that you can only pass a single array (as the last argument), because passing more than 1 will cause all arrays to be "flattened" into a single array.  If that isn't what you want (ie. if you need to pass more than 1), you can use references (I usually prepend 'p' to a variable used as a pointer/reference, like as parray): 

sub format_output {
    my ($var1, $var2, $parray1, $parray2) = @_;
     
    # One way to iterate through an array
    foreach (@$parray1) {
        print "The next item in the array is $_\n";
    }

    # Another way to iterate through an array
    for (my $i = 0; $i < @$parray2; $i++) {
        printf "Array item #%d = %s\n", $i+1, $parray2->[$i];
    }
}

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s''(q.S:$/9=(T1';s;(..)(..);$..=substr+crypt($1,$2),2,3;eg;print$..$/

In reply to Re: Help with scalar values and array as arguments to function by liverpole
in thread Help with scalar values and array as arguments to function by unixhome

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