How to concatenate nested arrays of strings

From: Siegfried Heintze (siegfried_at_heintze.com)
Date: 12/28/04 

To: <beginners@perl.org>
Date: Mon, 27 Dec 2004 18:36:13 -0700

I'm writing perl cgi and I like to buffer my output in an array of strings.
I just decided it would be very useful to be able to have nested arrays.

 

Below is a little function that does what a want. However,

(1) Is there a more compact way of performing this nested concatenation?

(2) Hasn't someone else already written a function like this that is
part of the standard repertoire?

(3) Assuming I have to use my own function below: My code only
concatenates the elements first argument. How can I concatenate all the
elements of all the function arguments?

(4) Is it possible to have nested lists? How would I modify my code to
handle those?

 

Thanks,

Siegfried

 

use strict;

use warnings;

sub concat {

  my $sResult = shift;

  return join("", map { ref($_) eq "ARRAY"? concat($_) :"$_ " }
@{$sResult});

}

print concat (["hello ", "there", ["a", "nested", "array"], "world!"]);

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