Re: Regex variables with delimiters

... the =~ operator has been cunningly designed so that ... there is a builtin assumption that it uses '/' delimiters ...

A counterexample:

c:\@Work\Perl\monks>perl -wMstrict -le
"my $raw = '/this/stuff/';
 print 'raw: yes' if 'does/this/stuff/match?' =~ $raw;
 ;;
 my $regex = qr/$raw/;
 print 'regex: yes' if 'and/this/stuff/also?' =~ $regex;
"
raw: yes
regex: yes
[download]

Give a man a fish: <%-{-{-{-<

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Re^2: Regex variables with delimiters by clerew (Novice) on May 19, 2019 at 15:11 UTC
Yes that works, but my copy pf the O'Reilly Camel book seems to suggest otherwise :-(. Anway, after a Good Night's sleep I worked out how I should have done it: `$regexp = <STDIN>` probably with a chomp somewhere, and then `$line =~ m?$regexp?` That seems to work fine, so thanks to all who replied. Additional remark on May 20th actually, that didn't work. Due to the special peculiarities of m?xxxxx? matches, you need to call `reset` whenever you change $regexp. Much simpler just to use a different delimiter, so here is my final versions, now working as intended: `$line =~ m#$regexp#`	[reply] [d/l] [select]
Re^3: Regex variables with delimiters by AnomalousMonk (Archbishop) on May 19, 2019 at 15:59 UTC
... `$line =~ m?$regexp?` ... That seems to work fine ... Again, `m?...?` is a special case of the `m//` operator (per this), but if you're happy with its one-match-only behavior, I'm happy too! :) Give a man a fish: `<%-{-{-{-<`	[reply] [d/l] [select]


go ahead... be a heretic
	PerlMonks

Re: Regex variables with delimiters

Additional remark on May 20th