Here is one way - say you want to replace 'baz' with 'qux':

use strict;

my @array = qw(foo bar bazzle baz);

@array = map { s/^baz$/qux/;$_ } @array;
[download]

This will replace all occurances of 'baz' in the array however. You didn't specify if this is okay or not.

UPDATE: oops - yet another problem to not solve with map. Thanks for the tip grantm and Anony. :)

So ... let's say that you only wanted to replace the first occurrance of 'baz':

my @array = qw(foo bazzle baz baz);

for (@array) {
   last if s/^baz$/qux/;
}
[download]

much better, just don't try this with a list:

for (qw(foo bazzle baz baz)) {
   last if s/^baz$/qux/;
}
[download]

which will not work, because you are trying to modify read-only values.

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)