Hi all,
On Tue, 25 Feb 2014 17:07:00 -0800
Jim Gibson <jimsgib...@gmail.com> wrote:
>
> On Feb 25, 2014, at 2:30 PM, Bill McCormick wrote:
>
> > What would be the perl'ish way using map or some other sugar to check if a
> > list of values meet some criteria? Instead of doing something like
> >
> > my @issues = qq(123,456,a45);
> > my $max = 999;
> >
> > for (@issues) {
> > die if $_ < 0 or $_ > $max;
> > }
> >
> > I want to check if each list item is numeric and > 0 but less than $max.
> >
> > Cheers!
>
> grep is the Perl function for testing a list of values against some criteria.
>
> perldoc -f grep
>
> 'grep BLOCK LIST' will return all of the items in LIST that result in a true
> value when BLOCK is evaluated. In scalar context, grep returns the number of
> items that evaluated to true, so you can either save all of the true-ish
> items or just get a count.
>
In this case, I think the functions all/any/notall/none from List::MoreUtils
will be better:
https://metacpan.org/pod/List::MoreUtils
Regards,
Shlomi Fish
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