ruby - Regex that matches a pattern but does not match ":" -

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i have regex looks types of hostnames like: .*-.*(nmtg)*|.*(\.nms). how modify not match: 11.22:33:44:55-66?

should match:

cs25-admin.nmtg.company.com  cs25-admin

but should not match:

11.22:33:44:55-66

two basic ways:

  • you can replace "match anything" . "match except colon" [^:] everywhere

  • you can prepend expression "no colons here end of string" (?!.*:)

edit signus said, regexp non-specific , open-ended; match more think. example, "----thricenmtgnmtgnmtg" full match, , "(-_-)". better policy , easier specify want, rather go listing exceptions. regexps suggested signus example.

they still match within strings: "dont match this: example.com" still match "example.com" part. if want, cool. if not, want anchor start , end of string, surrounding regexp /^.....$/.


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