CODEWITHSUNDEEP
shellawk
kyunghoon
kyunghoon

Reputation: 51

How to replace all matches with an incrementing number with a prefix string in awk

I have a text file like this:

AAAAAA this is some content.
This is AAAAAA some more content AAAAAA. AAAAAA
This is yet AAAAAA some more [AAAAAA] content.

I need to replace all occurrence of AAAAAA with an incremented number, e.g., the output would look like this:

x1 this is some content.
This is x2 some more content x3. x4
This is yet x5 some more [x6] content.

How can I replace all of the matches with an incrementing number and with a string prefix?

my quetion is very similar to How to replace all matches with an incrementing number in BASH? however the solution given which i tried to modify, can't seem to get working.

awk '{for(x=1;x<=NF;x++)if($x~/AAAAAA/){sub(/AAAAAA/,"x"++i)}}1' file

thanks.

Upvotes: 2

Views: 703

Answers (3)

karakfa
karakfa

Reputation: 67567

another awk

$ awk -v w='AAAAAA' '{while($0~w) sub(w,"x"++c)}1' file

x1 this is some content.
This is x2 some more content x3. x4
This is yet x5 some more [x6] content.

essentially an inefficient gsub.

this one uses record separator as the search word

$ awk -v RS='AAAAAA' -v ORS='' 'NR>1 && $0="x"++c $0' file

x1 this is some content.
This is x2 some more content x3. x4
This is yet x5 some more [x6] content.

to suppress the last one is harder, instead delayed the replacement by one and suppress the first one.

Upvotes: 4

RomanPerekhrest
RomanPerekhrest

Reputation: 92904

The shortest perl trick:

perl -pe 's/\bA+\b/x.++$i/ge' file

The output:

x1 this is some content.
This is x2 some more content x3. x4
This is yet x5 some more [x6] content.

Upvotes: 0

RavinderSingh13
RavinderSingh13

Reputation: 133780

awk to save here:

awk '{for(i=1;i<=NF;i++){if($i~/A+/){val="x"++count;sub(/A+/,val,$i)}}} 1' Input_file

OR

awk '{for(i=1;i<=NF;i++){if($i~/A+/){sub(/A+/,"x"++count,$i)}}} 1' Input_file

Output will be as follows.

x1 this is some content.
This is x2 some more content x3. x4
This is yet x5 some more [x6] content.

Upvotes: 1

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