Add a character C in a column if that column is blank

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# 8  
Old 08-26-2013
Try a~/[[:alpha:]]/ instead of a~/[a-z]/
# 9  
Old 08-26-2013
Ahh, my fault. I did forget my PC takes a-z for large and small letters due to bug.
As Scrutinizer write, try a~/[[:alpha:]]/ or a~/[A-Z]/
# 10  
Old 08-26-2013
Hi scrutinizer,

I tried your suggestion. But there is no change in the result.
# 11  
Old 08-26-2013
@jotne: It is not a bug, I am afraid, it is the way unicode localities are allowed to be defined. Therefore I rarely use character ascii ranges and prefer character class expressions instead...
# 12  
Old 08-26-2013
Hi thejitha,

So did you try:
awk '{a=substr($0, 17, 1); a=(a~/[[:alpha:]]/)?a:"C"; print substr($0,1, 16) a substr($0,18)}' file

What result did you get? Were you using your sample as input?
# 13  
Old 08-26-2013
Hi Jotne,

I used a~/[A-Z]/

I got the correct result. Thank you very much.
# 14  
Old 08-26-2013
I do know Smilie
But annoying anyway. So I do agree with you, use character class instead.
I will do it from now....

@thejitha Then a~/[[:alpha:]]/ should also work??
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