Re^2: dir match, dir may or may not appear

the regexp has errors:

Nested quantifiers in regex  marked by <-- HERE in m/^/usr/(/[^/]+{ <-
+- HERE 0,1})/bin//
[download]

Two expressions is fine,is there a one liner, as this could increase in future...?

Comment on Re^2: dir match, dir may or may not appear Download Code

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Re^3: dir match, dir may or may not appear by Corion (Patriarch) on Jan 12, 2016 at 09:18 UTC
Yes, see perlre. If one expression is too difficult, why not use two? If you really need to write it in one expression, use a group and quantify that: `m!^/usr(?:/[^/]+)?/bin!;` [download]	[reply] [d/l]
Re^3: dir match, dir may or may not appear by Anonymous Monk on Jan 12, 2016 at 09:20 UTC
a quantifier is + a quantifier is {0,1} You can't have {0,1}{0,1}{0,1}{0,1} You can't have +{0,1}+{0,1} If you want a pattern (`[^/]+`) to repeat, you have to group it perlre, perlretut, perlrequick describe these words I've used, go fish	[reply] [d/l]