> -----邮件原件----- > 发件人: JupiterHost.Net [mailto:[EMAIL PROTECTED] > 发送时间: 2006年2月28日 21:54 > 收件人: beginners@perl.org > 主题: Re: the way to get current index of an array > > > > [EMAIL PROTECTED] wrote: > > hi, perlers, > > Howdy, Thanks or your and others reply
>
> > Is there a simple way to get the current index of an array in loop
>
> yes
>
> > statement? the procondition is you cannot get this information from
> > array element. For example
> >
> > #!usr/bin/perl
> > my @arr = qw/a b c d e/;
> > for(@arr)
> > {
> > print "The No.?? element is $_\n"; }
>
> for my $idx (0 .. $#arr) {
> print "The no $idx element is $arr{$_}\n"; }
>
> my $idx = 0;
> for my $item(@arr) {
> print "The no $idx element is $item\n";
> $idx++;
> }
That's great! but in another you cannot touched context, what can we do? these
is no $ prefixed magic indicated this, but maybe some other corners keep this
info?
>
> There are other more magical ways but those will probably be
> best for you :)
>
> The first way not only has less code but is faster.
>
> HTH :)
>
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>
>
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