Detect differences in two files


 
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# 1  
Old 07-07-2010
Detect differences in two files

All,

I have two csv files, the format of which are exactly the same.

I would like to find differences between the two files but would like to identify the difference as opposed to just printing a different line.

For exmaple

File 1
Code:
xxx,yyy,zzz,1,2,3
111,222,333,xxx,yyy

File2
Code:
xxx,yyy,zzz,8,2,4
999,222,333,xxx,zzz

I would like a script which identifies and logs that fields 4 and 6 are different in line 1 and fields 1 and 5 are different in line two.

I was thinking of an awk script, can awk process two files and if so how are fields in each file referenced.

Thanks for your help
# 2  
Old 07-07-2010
diff file1.txt file2.txt
# 3  
Old 07-07-2010
A diff only gives me lines where a difference occurs.

I would like to also identify the field(s) in the line which are different
# 4  
Old 07-07-2010
Quote:
Originally Posted by pxy2d1
A diff only gives me lines where a difference occurs.

I would like to also identify the field(s) in the line which are different
Code:
awk -F, '{
  getline s < "file2"
  split(s,a,",")
  m="Line " NR ":"
  for(i=1;i<=NF;i++){
    if(a[i] != $i){
      m=m " field " i
    }
  }
  print m
}' file1

These 2 Users Gave Thanks to Franklin52 For This Post:
# 5  
Old 07-07-2010
Franklin,

Perfect, exactly what I wanted.

Thanks for your help.
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