You're welcome.

Regarding the for statement modifier, I think ++hexcoder has covered most of this in his response.

That's a fairly common Perl idiom that you're likely to see a lot. In fact, my usage wasn't the first in this thread: BrowserUk's zip() code has '... for split '', $b;'.

There's a bit more going on behind the scenes.

• for iterates its list, aliasing $_ to each item in turn (see perlsyn: Statement Modifiers for details)
• print defaults the filehandle to STDOUT and the list to the single item $_ (that's true in this case but an oversimplification nonetheless: see print for the full story)
• The '-l' switch (on the shebang line) adds a "\n" to the end of each print statement (again, true in this case but still an oversimplification: see perlrun for the full details of '-l')

print for unzip('AaBbCcDdEeFGHIJ', 5);
[download]

is equivalent to

for (unzip('AaBbCcDdEeFGHIJ', 5)) {
    print STDOUT "$_\n";
}
[download]

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