How to delete \n in Textmate

Question

Given a file which contains new lines, using Textmate, how can i remove them from the document

Given a text file

a


b

c

I'd like to end up with

a
b
c

Answer 1

I would use the regular expression ^\s*$\n which will match any line that is empty or contains only whitespace characters.

Just run Replace All with that in the Find box, and with the replace box empty.

Answer 2

Replace "\n+" with "\n" (be sure that "regular expression" checkbox is on). This replaces several consecutive linebreaks with only one.