Re: State this simple regex in English?

Is this any better? Tip #9 from the Basic debugging checklist: YAPE::Regex::Explain

The regular expression:

(?-imsx:CAT[2-9]*$)

matches as follows:
  
NODE                     EXPLANATION
----------------------------------------------------------------------
(?-imsx:                 group, but do not capture (case-sensitive)
                         (with ^ and $ matching normally) (with . not
                         matching \n) (matching whitespace and #
                         normally):
----------------------------------------------------------------------
  CAT                      'CAT'
----------------------------------------------------------------------
  [2-9]*                   any character of: '2' to '9' (0 or more
                           times (matching the most amount possible))
----------------------------------------------------------------------
  $                        before an optional \n, and the end of the
                           string
----------------------------------------------------------------------
)                        end of grouping
----------------------------------------------------------------------
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Comment on Re: State this simple regex in English? Download Code

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Re^2: State this simple regex in English? by misterperl (Friar) on Apr 20, 2016 at 17:22 UTC
thanks guys, STILL seems a bit ambiguous since, afterall, there ARE 0-many 2-9's at the end (there are 0 of them!)... But I suppose it only makes sense to act like this because otherwise it would behave just like /CAT.*/ YAPE::Regfex::Explain looks cool never tried it or knew about it, thanks for that tip...	[reply]
Re^3: State this simple regex in English? by soonix (Chancellor) on Apr 20, 2016 at 18:52 UTC
if your regex were "simply" `CAT[2-9]` then `CAT1` would match, but the `$` (which means end of string) in `CAT[2-9]$` prevents a match. Would you expect `C1AT` to match?	[reply] [d/l] [select]
Re^3: State this simple regex in English? by AnomalousMonk (Archbishop) on Apr 20, 2016 at 20:50 UTC
YAPE::Regfex::Explain looks cool ... It does, but of course be aware that, per the docs, "There is no support for regular expression syntax added after Perl version 5.6, particularly any constructs added in 5.10." Give a man a fish: `<%-{-{-{-<`	[reply] [d/l]
Re^4: State this simple regex in English? by Anonymous Monk on Apr 20, 2016 at 22:13 UTC
Luckily :) other regex tools, ppixregexplain.pl	[reply]
Re^5: State this simple regex in English? by Discipulus (Canon) on Apr 21, 2016 at 06:54 UTC
Re^3: State this simple regex in English? by stevieb (Canon) on Apr 20, 2016 at 17:45 UTC
You may also be interested in `use re 'debug';`	[reply] [d/l]