Return to Answer

deleted 3 characters in body

Source Link

edited Jun 20, 2013 at 19:15

You could do it with awk like:

awk '
  NR == FNR {w[$0]="";w[$0]; next}
  {for (i in w) if (index($0,i)) delete w[i]}
  END {for (i in w) print i}' file1.txt file2.txt

By using index, we're looking for substrings rather than matching regular expressions.

Because we delete the word from the array as soon as we find a match, we avoid unnecessary searches.

You could do it with awk like:

awk '
  NR == FNR {w[$0]=""; next}
  {for (i in w) if (index($0,i)) delete w[i]}
  END {for (i in w) print i}' file1.txt file2.txt

By using index, we're looking for substrings rather than matching regular expressions.

Because we delete the word from the array as soon as we find a match, we avoid unnecessary searches.

You could do it with awk like:

awk '
  NR == FNR {w[$0]; next}
  {for (i in w) if (index($0,i)) delete w[i]}
  END {for (i in w) print i}' file1.txt file2.txt

By using index, we're looking for substrings rather than matching regular expressions.

Because we delete the word from the array as soon as we find a match, we avoid unnecessary searches.

Source Link

answered Jun 20, 2013 at 19:09

You could do it with awk like:

awk '
  NR == FNR {w[$0]=""; next}
  {for (i in w) if (index($0,i)) delete w[i]}
  END {for (i in w) print i}' file1.txt file2.txt

By using index, we're looking for substrings rather than matching regular expressions.

Because we delete the word from the array as soon as we find a match, we avoid unnecessary searches.