[SOLVED] Search File For Each Occurrence of Pattern Less Than X Lines Apart

syg00 · 10-03-2016, 01:55 AM

Not like grail to use a redundant counter ...

JJJCR · 10-03-2016, 03:17 AM

Quote:

Originally Posted by HMW

"Elegant" is highly subjective. Personally, I prefer code that is: well written (properly indented), well commented, with proper use of exit codes and thus is easy to maintain and modify.

But... to each his/her own.

I agree wit this one, a code that can easily be read by others so that it is easy to maintain, modify and re-use the code if necessary.

Bottom line if it works, output and speed is not compromised and a year later you go back to it and you still understand what was done, I guess that would be considered elegant.

grail · 10-03-2016, 06:15 AM

Quote:

Originally Posted by syg00

Not like grail to use a redundant counter ...

How so?

syg00 · 10-03-2016, 06:22 AM

Code:

awk '/dog/{if(l && (NR-l < 4))print l,NR;l=NR;next}'

grail · 10-03-2016, 08:58 AM

Quote:

Originally Posted by syg00

Code:

awk '/dog/{if(l && (NR-l < 4))print l,NR;l=NR;next}'

Nicely done

You can also now remove the next from the end as it is superfluous

I thought I had tested something similar and it failed an edge case ... but seems to hold strong

RandyTech · 10-06-2016, 01:25 AM

elegant /ˈɛlɪɡənt/ adjective

gracefully concise and simple; admirably succinct.
cleverly simple; ingenious: as an elegant solution to a problem.
gracefully refined and dignified.
excellent; fine; superior.

Can't get much more simple than a cleverly refined and concise "single liner" to achieve a single task.

Code:

awk '/dog/{if(l && (NR-l < 4))print l,NR;l=NR;next}' /path/file

That hits "elegant" right square on the head. Works like a charm and super easy to adjust.