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Trim after nth occurrence with loop

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# 1  
Old 08-26-2018
Trim after nth occurrence with loop
Hello,
Below command trims right after the nth occurrence of a string.
When I try in while loop, it is not working.

In Terminal
Code:
IFS=/ ; read -ra val < Textfile ; echo "${val[*]:0:3}"

It gives only one line:
Code:
sunday/monday/tuesday

Textfile:
Code:
sunday/monday/tuesday/wednesday/thursday
august/feb/jan/april/
london/texas/paris/michigan/ontario

Expected output:
Code:
sunday/monday/tuesday
august/feb/jan
london/texas/paris

Script:
Code:
#!/bin/bash

while read -ra val
do
echo "${val[*]:0:3}"
done < Textfile

I could not solve this simple question.
Please let me know my fault.

Many thanks
Boris
# 2  
Old 08-26-2018
Try:
Code:
#!/bin/bash

oldIFS=$IFS
IFS=/
while read -ra val
do
  echo "${val[*]:0:3}"
done < Textfile
IFS=$oldIFS




--
Another way:
Code:
cut -d/ -f-3 Textfile

Last edited by Scrutinizer; 08-26-2018 at 07:19 AM..
This User Gave Thanks to Scrutinizer For This Post:
baris35
# 3  
Old 08-26-2018
Dear Scrutinizer,
Many thanks, I am not familiar with field seperator command but both works nice.


Kind regards
Boris
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