unconstant delimiter


 
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# 8  
Old 09-09-2011
With GNU awk 4 you can easily reconstruct the original variable field separator(s):

Code:
 split(string, array [, fieldsep [, seps ] ])
Divide string into pieces separated by fieldsep and store the pieces in array and
the separator strings in the seps array.

For example:

Code:
awk '{
  split($0, t, FS, s)
  for (i = 1; ++i <= l;)
    printf "%s", (t[i] (i < l ? s[i] : RS))
  }' l=4 infile

Code:
% awk '{
  split($0, t, FS, s)
  for (i = 0; ++i <= l;)
    printf "%s", (t[i] (i < l ? s[i] : RS))
  }' l=5 infile
6271        manchester          (tab) 11/09/09      200
6272        manchester          (tab) 11/09/09      200
% awk '{
  split($0, t, FS, s)
  for (i = 0; ++i <= l;)
    printf "%s", (t[i] (i < l ? s[i] : RS))
  }' l=4 infile
6271        manchester          (tab) 11/09/09
6272        manchester          (tab) 11/09/09
% awk '{
  split($0, t, FS, s)
  for (i = 0; ++i <= l;)
    printf "%s", (t[i] (i < l ? s[i] : RS))
  }' l=2 infile
6271        manchester
6272        manchester

This User Gave Thanks to radoulov For This Post:
 
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