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Appending string (charachters inside the line) to a fixed width file using awk or sed

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# 1  
Old 12-08-2009
Appending string (charachters inside the line) to a fixed width file using awk or sed
Source File:
Code:
abcdefghijklmnop01qrstuvwxyz
abcdefghijklmnop02qrstuvwxyz
abcdefghijklmnop03qrstuvwxyz
abcdefghijklmnop04qrstuvwxyz
abcdefghijklmnop05qrstuvwxyz

Whatever characters are in 17-18 on each line of the file, it should be concatenated to the same line at the character number value it shows

Output File:
Code:
01abcdefghijklmnop01qrstuvwxyz
a02bcdefghijklmnop02qrstuvwxyz
ab03cdefghijklmnop03qrstuvwxyz
abc04defghijklmnop03qrstuvwxyz
abcd05efghijklmnop05qrstuvwxyz

Last edited by zaxxon; 12-08-2009 at 03:14 AM.. Reason: code tags
# 2  
Old 12-08-2009
Code:
awk '
        {
                pat1=(substr($0,17,2))
                sub(pat1,"")
                pat2=substr($0,0,NR-1)
                sub(pat2,"")
                print pat2 pat1 $0
        }
' infile

Output:
Code:
01abcdefghijklmnopqrstuvwxyz
a02bcdefghijklmnopqrstuvwxyz
ab03cdefghijklmnopqrstuvwxyz
abc04defghijklmnopqrstuvwxyz
abcd05efghijklmnopqrstuvwxyz

# 3  
Old 12-08-2009
Wrench
Something like this?

Code:
awk '{$0=substr($0,1,i++) substr($0,17,2) substr($0,i)}1' file

# 4  
Old 12-08-2009
Debian
Thanks!!! worked like magic
# 5  
Old 12-08-2009
bash
Code:
while read -r line
do
    num=${line:16:2}
    echo "${line:0:$num-1}${num}${line:$num}"
done < "file"

# 6  
Old 12-08-2009
Code:
perl -ne '{s/(.*[^0-9]*)([0-9]+)([^0-9].*)/substr($1,0,$2-1).sprintf("%02d",$2).substr($1,$2-1).$2.$3/e;print;}'

# 7  
Old 12-09-2009
The OP asked:
Quote:
Originally Posted by tamahomekarasu
Whatever characters are in 17-18 on each line of the file, it should be concatenated to the same line at the character number value it shows
So imo only ghostdog and summer cherry's solutions are working correctly. I prefer Ghostdog's solution because it is nice and simple.
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