I want to remove all numbers, but only after |
blah, 1. retain 3. dont alter..blah | blah 1. remove balh.. 19. altered
after I apply regex the string should be
blah, 1. retain 3. dont alter..blah | blah remove balh.. altered
when I replace using this regex [0-9]+\. It matches all the "numbers with dot" even before | , and when I use regex | [0-9]+\. it only selects the first number and dot i.e 1., after |
You can assert not a pipe char to the right using a negative lookahead and using a negated character class ruling out a newline or |:
\d+\.(?![^\r\n|]*\|)
Explanation
\d+\. Match 1+ digits and a dot(?! Negative lookahead, assert not to the right
[^\r\n|]*\| Match optional chars other than a newline or |) Close lookaheadSee a regex demo.
Another option is to use a positive lookahead to assert not a pipe char to the right until the end of the string:
\d+\.(?=[^\r\n|]*$)
Explanation
\d+\. Match 1+ digits and a dot(?= Positive lookahead, assert to the right
[^\r\n|]*$ Match optional chars other than a newline or | till end of string $) Close lookaheadSee a regex demo.