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Forum: UNIX for Dummies Questions & Answers 05-24-2010

Extract repeating data from file

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Assuming n is a sequence of numbers and just a...

Assuming n is a sequence of numbers and just a single letter C before the n...
awk '{arr[$1]=$2;K=$1}END{
for(i in arr){
gsub(/C/,"",K)
I=i;gsub(/C/,"",i)
if(i<=K) print...

Forum: UNIX for Dummies Questions & Answers 05-17-2010

count the number of occurance and increment

2,063

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Try: awk '{print $1, ++a[$1]}' file

Try:
awk '{print $1, ++a[$1]}' file

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