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Split file into rows in UNIX


 
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# 1  
Old 02-25-2020
Split file into rows in UNIX

Hi Team,
I have delimited file with 6gb of data and it is not hsve newline seperator.

Ask : I would like to split file into rows based on columns.

Example:
File.txt contains below data
Code:
abc-per-qwe-xyz-triv-amz-try-utr-ytu-uio-pou-cvf-bht-grt-qwe

Expected output:
Code:
abc-per-qwe
xyz-triv-amz
try-utr-ytu
uio-pou-cvf
bht-grt-qwe


Last edited by vbe; 02-26-2020 at 10:57 AM..
# 2  
Old 02-25-2020
Please show attempts to complete this task. Otherwise a moderator might have you do it manually with a text editor. Also, search the site for similar or exact solutions to accomplish this task.

Last edited by RavinderSingh13; 02-26-2020 at 12:36 PM..
# 3  
Old 02-26-2020
Hi
If you use regexp you can hang the computer.
Code:
tr '-' '\n' <file | pr -3tas'-' >new_file

it takes 10 to 20 minutes
You can look at the progress.
In another window, run
Code:
progress -c pr -M

or
Code:
pv file | tr '-' '\n' | pr -3tas'-' >new_file

# 4  
Old 02-26-2020
We do encourage users to post their own attempts before helping.
Please in the future, show your effort, as we are not your scripting service.

Give this a shot :
Code:
awk -F"-" ' { for ( i=3;i<=NF;i+=3) print $(i-2) FS $(i-1) FS $i }' input

Regards
Peasant.
This User Gave Thanks to Peasant For This Post:
# 5  
Old 02-26-2020
Code:
<file tr - $'\n' | paste -sd'--\n'
abc-per-qwe
xyz-triv-amz
try-utr-ytu
uio-pou-cvf
bht-grt-qwe

This User Gave Thanks to RudiC For This Post:
# 6  
Old 02-26-2020
It prints the line occurrence of column 1 ($1). a[$1]++ fails for the first occurrence increment since the array value for that key does not exist. The ! means not true so the expression is evaluated to true. The default action for true in awk is to print the line. In other terms: if the previous value of column 1 in array "a" cannot be incremented then print the line. The line could have been written as: '{if (! a[$1]++) print $0}'
# 7  
Old 02-26-2020
Quote:
Originally Posted by RudiC
Code:
<file tr - $'\n' | paste -sd'--\n'

Speed increased 5-10 times!
Quote:
Originally Posted by Peasant
Code:
awk -F"-" ' { for ( i=3;i<=NF;i+=3) print $(i-2) FS $(i-1) FS $i }' input

6GB single line file completely froze the system
This User Gave Thanks to nezabudka For This Post:

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