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sr #106713: wish: a single construct to replace "head | tail"

Submitted by:  Richard Neill <richardneill>
Submitted on:  Thu 09 Apr 2009 05:55:00 AM UTC  
Category:  None Priority:  5 - Normal
Severity:  1 - Wish Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open Operating System:  None

Fri 24 Sep 2010 08:38:23 PM UTC, comment #1: 

Sounds like a job for SED:
sed -n '15p' FILE

Matthias Bartelt <barteltm>
Thu 09 Apr 2009 05:55:00 AM UTC, original submission:  

I often write things like:
   head -n 15 FILE | tail -n 1
i.e. to extract precisely one line (the 15th here) from the file.

But that's complex, and a waste of a process.

Thus I propose two new options:
   head should gain the option:    -t [NUMBER] 
   tail should gain the option:    -h  [NUMBER]

These would mean pipe the output through "{head,tail} -n NUMBER"
respectively. (But this would be done within the single process, rather than actually using a pipe).

So my syntax above becomes:
   head -n 15 -t 1 FILE

Richard Neill <richardneill>


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