Can you help with this lil problem:
I've got lines that look like this
1: regex bla bla ... .. bla regex bla bla
2: bla bla regex bla ... regex
I want to replace the /regex/ with /regex2/ only the first on the
line, not the second
Or one on two
Or the only the odd-numbered apparitions of "regex"
Each line contains exactly 2 "regex"
Thanks for your help