Sponsored Content
Full Discussion: Head and Tail in One Line
Top Forums Shell Programming and Scripting Head and Tail in One Line Post 302131599 by matrixmadhan on Sunday 12th of August 2007 11:50:38 PM
Old 08-13-2007
in awk

Code:
awk '{ if ( NR == 1 ) { header=$0 } else { arr[i++] = $0 } }END { print header, $0; for (x=0; x<i-1; x++) {print arr[x]} }' test2

 

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Implementing MORE,HEAD & TAIL

hai in my shell script i want to replace the following commands 1) more 2) head 3) tail i want to try all type of possible options avaliabul in the above commands please help in implementing those commands (9 Replies)
Discussion started by: g_s_r_c
9 Replies

2. UNIX for Dummies Questions & Answers

head & tail

I've a major file which includes other files and now I wanna 'cut' the file in several minor parts....like .... find / -name "*.tmp" >filea wc -l filea >fileb sed -e '1s/ filea//' fileb >filec AMOUNT=`cat filec` if ; then cat file a |head -100l (ell) |tail -100l >filec cat file a |head... (6 Replies)
Discussion started by: svennie
6 Replies

3. Shell Programming and Scripting

Imitate head and tail command script

Hi, I have been given assignment of 30 scripts out of which I was able to solve many, I need help with few out of which one asks to imitate head and tail command of unix without using the head and tail commands. Problem is stated below: Write an interactive shell script to imitate the head... (5 Replies)
Discussion started by: nutalk
5 Replies

4. Shell Programming and Scripting

Averaging in increments using awk & head/tail

Hi, I only have a very limited understanding and experience with writing code and I was hoping I could get some help. I have a dataset of two columns (txt format, numbers in each row separated by a tab) Eg. 1 5 2 5 3 6 4 7 5 6 6 6 7 ... (5 Replies)
Discussion started by: Emred_Skye
5 Replies

5. Shell Programming and Scripting

head / tail combination returns multiple rows

Hi, As part of our project, we need to load historical data for a year before our system is live. We have the data feed files that we need to load. However, I need to make sure that the file structure (number of fields separated by a comma) on the field is same for all the files of the same... (1 Reply)
Discussion started by: raj.jha
1 Replies

6. UNIX for Dummies Questions & Answers

head\tail how to display middle lines

hay i need to display middle line: 1 2 3 4 5 how can i display 3-4? (6 Replies)
Discussion started by: margan_ron
6 Replies

7. Homework & Coursework Questions

Head Tail Problem

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: view the 7th line of the program xxx.sh 2. Relevant commands, code, scripts, algorithms: head command tail... (10 Replies)
Discussion started by: hbell221
10 Replies

8. UNIX for Dummies Questions & Answers

What should be precedence of using awk, sed, head and tail in UNIX?

Hi All, I am new to unix. In this forum some days back, I have read something like below: 1) Do not use perl if awk can do your work. 2) Do not use awk if sed can do your work. . . . I do not re-collect the whole thing. I think it is good to know the precedence of using these... (2 Replies)
Discussion started by: Prathmesh
2 Replies

9. Homework & Coursework Questions

How to display certain line of file only using head or tail in 1 command?

First month learning about the Linux terminal and it has been a challenge yet fun so far. We're learning by using a gameshell. I'm trying to display a certain line ( only allowed 1 command ) from a file only using the head or tail. I'm pretty about this answer: head -23 history.txt | tail -1... (1 Reply)
Discussion started by: forzatekk
1 Replies
Jifty::DBI::Record::Cachable(3pm)			User Contributed Perl Documentation			 Jifty::DBI::Record::Cachable(3pm)

NAME
Jifty::DBI::Record::Cachable - records with caching behavior SYNOPSIS
package Myrecord; use base qw/Jifty::DBI::Record::Cachable/; DESCRIPTION
This module subclasses the main Jifty::DBI::Record package to add a caching layer. The public interface remains the same, except that records which have been loaded in the last few seconds may be reused by subsequent fetch or load methods without retrieving them from the database. METHODS
flush_cache This class method flushes the _global_ Jifty::DBI::Record::Cachable cache. All caches are immediately expired. _flush_key_cache Blow away this record type's key cache load_from_hash Overrides the implementation from Jifty::DBI::Record to add caching. load_by_cols Overrides the implementation from Jifty::DBI::Record to add caching. _cache_config You can override this method to change the duration of the caching from the default of 5 seconds. For example, to cache records for up to 30 seconds, add the following method to your class: sub _cache_config { { 'cache_for_sec' => 30 } } AUTHOR
Matt Knopp <mhat@netlag.com> SEE ALSO
Jifty::DBI, Jifty::DBI::Record perl v5.14.2 2010-09-21 Jifty::DBI::Record::Cachable(3pm)
All times are GMT -4. The time now is 09:36 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy