I have a file and I need to filter lines that have (or don't have) N occurrences of a pattern.
I.e., if my pattern is the letter
o and I what to match lines where the letter
o occurs exactly 4 times, the expression should match the first of the following example lines but not the others:
foo foo foo foo foo foo
I thouth I could do it with a regex in vim, or sed, awk, or any other tool. I've googled and haven't found anyone that has done a similar thing. Probably will have do a script or something similar to parse each line. Does anyone have done a similar thing?