Other Ways To Do It (mostly not one-liners) can be found at the thread "How do I remove blank lines from text files?".
Hmmm... personally, I like Ovid's example below better than mine. It *does* seem more directly recognizable.
This snippet removes all non-empty lines containing
only whitespace, but I don't think that's particularly
intuitive behaviour. If I want to remove all "blank"
lines from a file, I probably want:
perl -i.bak -ne 'print if /\S/' file.txt
and if I want to get rid of all the lines with
"useless" whitespace, I probably want to collapse them
to empty lines:
perl -i.bak -ne 's/^\s+$//;print' file.txt
Update: Changed first one-liner
to Ovid's for readability.
Seems a bit more intuitive to me :)
Join the Perlmonks Setiathome Group or just click on the the link and check out our stats.
-- Chip Salzenberg, Free-Floating Agent of Chaos
Priority 1, Priority 2, Priority 3
Priority 1, Priority 0, Priority -1
Urgent, important, favour
Data loss, bug, enhancement
Out of scope, out of budget, out of line
Family, friends, work
Impossible, inconceivable, implemented
Results (60 votes),