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Remove empty records

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# 8  
Old 05-17-2012
Remove empty records
Hi Scrut,

I found this post very useful. Can you kindly explain this code like how each term is working here

Code:
awk '$2{print RS}$2' FS='\n' RS=\> ORS= infile

Sorry I am looking this post little late.

Thanks
Krsnadasa
# 9  
Old 05-17-2012
I think I wrote that a bit quickly. It is correct, but probably this equivalent code is probably somewhat easier to understand:
Code:
awk '$2{print RS $0}' FS='\n' RS=\> ORS= infile

This means:
  • use ">" as the records separator
  • use a newline as the field separator (so $1 is the header and $2 is the first line of the content)
  • do not use an output record separator (this is because we want it printed before instead of after the record, so we cannot use ORS for that)
  • If field 2 exists ($2{...}) then we are processing a record that consists of more than just a header, and we can print it preceded by the record separator (>) print RS $0
This User Gave Thanks to Scrutinizer For This Post:
krsnadasa
# 10  
Old 05-17-2012
Remove empty records
Thanks Scrut,

Very useful information.. Smilie

Krsnadasa...
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