[LA.pm] push question

[Brian Cooke]

>
> I'm reading an array from a file:
>
> @lines = <FILE>;
>
...
>
> @lines={1,2,3};
> push(@lines,4);
> push(@lines,5);
>
> foreach(@lines)
> { printf "%s-", $_
> }
>
> Here's the output:
>
> % perl pushtest.pl
> HASH(0x334ca0)-4-5
>
> What I want is 1-2-3-4-5. How?
>
The {1,2,3} assignment places an anonymous hash reference in the first 
element of @lines. Warnings enabled or -w would have alerted you about 
an odd number of elements in that anonymous hash.  So the first element 
is a reference to a hash, and the second and third are 4 and 5.

This will give you the 1-2-3-4-5 you're looking for:

#!/usr/bin/perl

use warnings;
use strict;

my @lines = (1,2,3);
push @lines, 4;
push @lines, 5;

print join('-', @lines), "\n";


Not sure where the file slurp comes in, though, in relation to the 
later assignment to (1,2,3)...

Cheers,

Brian