What is a regex to match a string NOT at the end of a line?
Solution 1:
/abc(?!$)/
(?!$) is a negative lookahead. It will look for any match of abc that is not directly followed by a $ (end of line)
Tested against
- abcddee (match)
- dddeeeabc (no match)
- adfassdfabcs (match)
- fabcddee (match)
applying it to your case:
ruby-1.9.2-p290 :007 > "aslkdjfabcalskdfjaabcaabc".gsub(/abc(?!$)/, 'xyz')
=> "aslkdjfxyzalskdfjaxyzaabc"