[Chicago-talk] Could someone explain this

Shlomi Fish shlomif at shlomifish.org
Thu Jun 28 11:00:32 PDT 2018

Hi Jim,

On Thu, 28 Jun 2018 12:21:25 -0500
Jim Jacobus <JJacobus at PonyX.com> wrote:

> Hi,
> I'm embarrassed to ask this, but I'd like to understand this piece of code.
> I want to find out how many times a certain substring appears in the 
> string ($block). $block is a very long string that is part of an XML file.
> I found this when rooting around for an example:
> my $count = () = ( $block =~ m/\<category\>/g);
> It does work. $count gives me the number of times the substring 
> appears in $block.
> However, I don't undstand how this works. What is "= () =" mean.

https://metacpan.org/pod/distribution/perlsecret/lib/perlsecret.pod#Goatse .
Also note regarding XML that http://perl-begin.org/uses/text-parsing/ - do not
use regexes for that.

> Jim
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Shlomi Fish       http://www.shlomifish.org/
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