From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: 22 October 2007 21:13 To: activeperl@listserv.ActiveState.com Subject: Index of element in array?
> Gurus, > > I'm unable to find this in the Camel, Panther, or Billygoat books, so I'll ask you... Is there a Perl function > that returns the index of a given element in an array? For example: > > my @list = q( apple banana pear grapefruit); > > my $look4 = "banana"; > > my $ndx = somefunc( $look4, @list ); # sets $ndx to 1 > > $look4 = "monkeywrench"; > > $ndx = somefunc( $look4, @list); # sets $ndx to -1, or maybe undef? > > I'm trying to find a more elegant way than running a foreach loop over @list. You have already received some good answers (particularly Martin's suggestion of List::MoreUtils), but I shall ask, what seems to me, the obvious question. What are you trying to achieve by doing this, as there may be a more 'perl-ish' way of doing it than finding the index of elements in an array. I believe that the main reason that such a function does not already exist in core Perl is that a) it is very rarely necessary, and b) it is fairly trivial to implement when it is (see the code for List::MoreUtils). If you can answer this, then you might get an even more useful suggestion. HTH Also, can I echo Martin's request to post in plain text. -- Brian Raven ========================================= Atos Euronext Market Solutions Disclaimer ========================================= The information contained in this e-mail is confidential and solely for the intended addressee(s). Unauthorised reproduction, disclosure, modification, and/or distribution of this email may be unlawful. If you have received this email in error, please notify the sender immediately and delete it from your system. The views expressed in this message do not necessarily reflect those of Atos Euronext Market Solutions. Atos Euronext Market Solutions Limited - Registered in England & Wales with registration no. 3962327. Registered office address at 25 Bank Street London E14 5NQ United Kingdom. Atos Euronext Market Solutions SAS - Registered in France with registration no. 425 100 294. Registered office address at 6/8 Boulevard Haussmann 75009 Paris France. L'information contenue dans cet e-mail est confidentielle et uniquement destinee a la (aux) personnes a laquelle (auxquelle(s)) elle est adressee. Toute copie, publication ou diffusion de cet email est interdite. Si cet e-mail vous parvient par erreur, nous vous prions de bien vouloir prevenir l'expediteur immediatement et d'effacer le e-mail et annexes jointes de votre systeme. Le contenu de ce message electronique ne represente pas necessairement la position ou le point de vue d'Atos Euronext Market Solutions. Atos Euronext Market Solutions Limited Société de droit anglais, enregistrée au Royaume Uni sous le numéro 3962327, dont le siège social se situe 25 Bank Street E14 5NQ Londres Royaume Uni. Atos Euronext Market Solutions SAS, société par actions simplifiée, enregistré au registre dui commerce et des sociétés sous le numéro 425 100 294 RCS Paris et dont le siège social se situe 6/8 Boulevard Haussmann 75009 Paris France. ========================================= _______________________________________________ ActivePerl mailing list ActivePerl@listserv.ActiveState.com To unsubscribe: http://listserv.ActiveState.com/mailman/mysubs
