Matching a string that does not contain certain word... without lookaround
1177
Regular expression to match a line that doesn't contain a word
119251
Lookup and return value based on sub-string match
64366
Matching an optional substring in a regex
8490
Exclude specific words in search
65270
How do I perform string matching and replacements?
21337
Determining whether a string has a substring (word)
478
How to determine if string contains specific substring within the first X characters
104174
Regex match entire words only
99635
How can I match on an attribute that contains a certain string?
150982
Java String - See if a string contains only numbers and not letters
119124
grep for string not preceded by another string
78395
Checking whole string with a regex
102049
How to delete all lines that do NOT contain a certain word in Vim?
57153
String.split() *not* on regular expression?
104414
JavaScript regular expressions and sub-matches
156045
How do I grep for lines containing either of two words, but not both?
89219
How can I find and replace only if a match forms a whole word?