Re^2: how to use string RE (against $

What I meant is how, after "$re_str" has been stringified, would the code know the string is meant to be used as a regexp instead of a direct compare. The keys represent command-line flags or switches after one dash has been removed, but in this case I wanted the key to match several possibilities.

As I noted in the other response, it looks like searching for '(?' at the beginning of the expression is the best way.

Comment on Re^2: how to use string RE (against $_ and capture)

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Re^3: how to use string RE (against $_ and capture) by AnomalousMonk (Archbishop) on Nov 08, 2016 at 04:19 UTC
... how, after "$re_str" has been stringified, would the code know the string is meant to be used as a regexp instead of a direct compare. The code "knows" because the string is used by a `=~ m// s///` (I think that's all of them) matching operator. And what's a "direct compare" anyway? Give a man a fish: `<%-{-{-{-<`	[reply] [d/l] [select]
Re^4: how to use string RE (against $_ and capture) by perl-diddler (Chaplain) on Nov 08, 2016 at 04:30 UTC
If one's key is in '$_', direct compare is either "$_ eq 'x'" or in this case, using "$_" as a hash key, directly and not trying to match it to a Regex. Thus my need to know if a key in the table is a literal or a regex so I can do the right test to see if the key matches.	[reply]
Re^5: how to use string RE (against $_ and capture) by AnomalousMonk (Archbishop) on Nov 08, 2016 at 05:21 UTC
You seem to be talking about doing what I would refer to as an exact match versus a pattern match. This information would IMHO be best stored as a separate piece of data in your data structure. Give a man a fish: `<%-{-{-{-<`	[reply] [d/l]
Re^5: how to use string RE (against $_ and capture) by dave_the_m (Monsignor) on Nov 08, 2016 at 08:54 UTC
Thus my need to know if a key in the table is a literal or a regex so I can do the right test to see if the key matches Since the regex will have been stringified if used as a hash key, The only way I can think of doing that (if you can't store extra info in the hash value to indicate this) is to see if the key string matches /^$\?.*$$/. This will of course fail if an exact string match looks like "(?....)" Dave.	[reply]