in reply to Re: Re: (stephen) Hash Tutorial
in thread Hash Tutorial

What you want in your snippet there is a grep() not map() as you're filtering out items not applying transforms to them e.g
shell> perl -le '%a = qw/1 1 2 2 3 3/; %b = qw/2 2 3 3/; \ print grep !$b{$_}, keys %a' 1
Also note that the map() in your snippet is returning a list of three items - a 1 and two empty strings.
HTH

_________
broquaint

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Re: Re: Re: Re: (stephen) Hash Tutorial
by !unlike (Beadle) on Apr 28, 2003 at 13:09 UTC

    Thanks broquaint
    I realised this just now and was about to post an update. But you beat me to it. :)

    !unlike

    I write my Perl code like how I like my sex: fast and dirty. ;)