Meaning for the following regular expression

Tony1 has asked for the wisdom of the Perl Monks concerning the following question:

Replies are listed 'Best First'.
Re: Meaning for the following regular expression by Joost (Canon) on Feb 02, 2008 at 19:54 UTC
1) yes. you just did. if you're wondering what something as simple as that does you should read the regex documentation first. See perlretut. Come back with a more specific question if you're still confused after reading that. 2) y and tr are the same operator. "What should it profit a man, if he should win a flame war, yet lose his cool?"	[reply]
Re: Meaning for the following regular expression by hipowls (Curate) on Feb 02, 2008 at 19:56 UTC
If a regular expression has a /x modifier then white space is not significant and it may contain comments. `m/foor # this is not a comment/` [download] does not contain a comment while `m/foo # this is a comment bar/x` [download] does and matches 'foobar'. See perlre and perlreref for more details. There is no difference between tr/// and y/// except that old ~~awk~~ sed hackers feel more at home;-)	[reply] [d/l] [select]
Re^2: Meaning for the following regular expression by Jim (Curate) on Feb 02, 2008 at 23:30 UTC
I think you mean old sed hackers like me. But I'm an old shell hacker, too, so I use tr///, not y///. Cheers! Jim	[reply]
Re^3: Meaning for the following regular expression by hipowls (Curate) on Feb 03, 2008 at 00:05 UTC
Blushes with shame, you are absolutely right. It's been so long since I've used either that my memory is failing me;)	[reply]
Re: Meaning for the following regular expression by kyle (Abbot) on Feb 02, 2008 at 19:57 UTC
Well, `y` is a synonym for `tr` (see perlop under "Quote-like operators"). The regular expression `m/ bar /x` matches the literal string "bar" anywhere in the text.	[reply] [d/l] [select]
Re: Meaning for the following regular expression by Skeeve (Parson) on Feb 02, 2008 at 20:05 UTC
Homework? Do I smell homework? `s$$([},&%#}/&/]+}%&{});#$&&s&&$^X.($'^"%]=\&(\|?{%` `+`.+=%;.#_}\&"^"-+%*).}%:##%}={~=~:.")&e&&s""`$''`"e	[reply] [d/l] [select]