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Awk to convert a text file to CSV file with some string manipulation

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Top Forums Shell Programming and Scripting Awk to convert a text file to CSV file with some string manipulation
# 8  
Old 08-17-2012
Quote:
Originally Posted by mjf
Using awk, try

Code:
cat input.file | awk ' BEGIN {print "Column1;Column2;Column3;Column4;Column5" } { print  substr($0,1,6) ";" substr($0,7,5) ";" $2 ";" substr($0,26,6) ";" substr($0,7,5) ";" $2 ";" substr($0,26,6) ";" substr($0,32,4) } '

why exactly do you need 'cat'?
# 9  
Old 08-17-2012
Certainly do not need to pipe the contents of the input data file to awk using 'cat' and can input the data file in the awk command itself as in the prior examples, but can you tell me if there is any difference/advantage to using one method over the other (e.g. performance, amount of memory, # of recs that can be read, etc.)?
Last edited by mjf; 08-17-2012 at 01:07 PM..
# 10  
Old 08-17-2012
look at this discussion for starters.
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