it could cause unintended and confusing side effects

It's of course a matter of opinion, but I do agree with this - it's a neat but somewhat obscure use of glob. It can be useful, as it allows one to generate combinations using just core Perl, without loading e.g. Algorithm::Combinatorics. But all it takes is someone who doesn't know the details ("If non-empty braces are the only wildcard characters used ...") or the interpolation of unchecked variables into the pattern for it to break. Personally, my feeling is that in a one-off script, or with a fixed string plus a comment warning future maintainers, it's ok to use. But if you want to play it safe with respect to future maintainers, I'd avoid it.

As for using <a b c> as a replacement for qw/a b c/, sure it's clever, but IMO it's a silly place to save two characters, and I'd probably recommend against it. Also, I like to use File::Glob ':bsd_glob';, which breaks it:

$ perl -le 'print for <a b c>'
a
b
c
$ perl -MFile::Glob=:bsd_glob -le 'print for <a b c>'
a b c

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In reply to Re: Creating arrays with glob patterns without metacharacters by haukex
in thread Creating arrays with glob patterns without metacharacters by Lotus1

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