How can I delete empty line from my ouput by grep?

Question

Exists way to remove empty lines with cat myfile | grep -w #something ?

I looking for simple way for remove empty lines from my output like in the way the presented above.

@thatotherguy because that I want all the line apart of `empty line` , so I looking for `something` that can do it.. — Software_t, Jul 17 '18 at 20:10

jeremysprofile · Answer 1 · 2018-07-17T20:11:02.187

0

You can pipe your output to awk to easily remove empty lines

cat myfile | grep -w #something | awk NF

EDIT: so... you just want cat myfile | awk NF?

if you have to use grep, you can do grep myfile -v '^[[:blank:]]*$'

edited Jul 17 '18 at 20:11

answered Jul 17 '18 at 20:06

jeremysprofile

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I am looking for `something` that can for treat this proble, for example, something like " " (instead `something` ) but it's not working with " " .. – Software_t Jul 17 '18 at 20:07
why don't you want to use awk? – jeremysprofile Jul 17 '18 at 20:08
I thought for example about that: `cat myfile | grep -w " " ` .. but it's not working.. – Software_t Jul 17 '18 at 20:08
And I don't want `awk` because I try to understand how to do it (if at all) by `grep` .. – Software_t Jul 17 '18 at 20:09
@Software_t, see edit – jeremysprofile Jul 17 '18 at 20:11

score 0 · Answer 2 · answered Jul 17 '18 at 20:10

This really belongs on the codegolfing stackexchange because it's not related to how anyone would ever write a script. However, you can do it like this:

cat myfile | grep -w '.*..*'

It's equivalent to the more canonical grep ., but adds explicit .*s on either side so that it will always match the complete line, thereby satisfying the word boundary conditions imposed by -w

How can I delete empty line from my ouput by grep?

2 Answers2