Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
given string “abcdefgh” how do I match all strings starting with “abcde”, whose do not end in “fgh”?
More generic task – match string startin with certain common pattern but do not end in any of pre-defined (exclusion) patterns.
"\babcde(^fgh)\b"
doesn’t work
if the needed prefix and the excluded suffix may not overlap, you can use a negative lookahead. By “strings”, I assume you mean “words”:
If the prefix and suffix may overlap, move the lookahead to the front
If by “strings” you mean “strings”, use the
^and$as the boundary conditions:If you want to get the match as well, rather than just test the string, include “the rest of the string” to the regex: