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  #1  
Old 06-20-2006
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concatenating static string to records in data file
I just need to add a static ID to each output record so the users will be able to tell which group records in combined flatfiles come from I have the static ID in a bourne variable. I tried

awk '{print "${GroupID}" $0}' infile > outfile

But I ended up with the string ${GroupID} instead of the value of the var in the output file. Surely there's an easy way to do this? Thanks.
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  #2  
Old 06-20-2006
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sed "s#^#${GroupID} #" infile > outfile
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  #3  
Old 06-22-2006
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You can pass variables into Awk using -v (and note that they are printed without the leading $)
Code:
$ GroupID="This Group"
$ awk -v GID="$GroupID " '{print GID $0}'  names.dat
This Group Jim
This Group Jon
This Group Joe
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  #4  
Old 06-22-2006
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This works but I don't understand what the #s do. Do they substitute for a slash in sed? Oh, and thanks for the help. I got snowed with other issues for a couple of days so I was just able to impliment this.
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Old 06-22-2006
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I had vgersh99's response open on one of my monitors since yesterday so I hadn't noticed thestevew's response. While thestevew's response looks good and would undoubtably work it's not near as obscure as vgersh99's response. So in the old unix spirit I'll go with that.
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  #6  
Old 06-22-2006
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Quote:
Originally Posted by gillbates
This works but I don't understand what the #s do. Do they substitute for a slash in sed? Oh, and thanks for the help. I got snowed with other issues for a couple of days so I was just able to impliment this.
Yes, that's correct - you can use ANY single character as an 'action' separator in sed. The more common and widely spread is ''/
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