On Friday, 17 Feb 2017 at 12:33, Roland Everaert wrote:
> Hi,
>
> I am trying to filter a table using the following awk code block.

I think your problem is an error in the awk script; specifically, the
match is outputting all lines because you need to have the { on the same
line as the match expression.  Try this:

#+BEGIN_SRC awk :stdin list-example :var fstcol=1 :var seccol=3 :results output org
  BEGIN {
  print "|Host|Result"
  print "|-"
  }
  $seccol ~ /[0-9]{1,3}(\.[0-9]\{1,3\}){3}/ {
  print "|"$fstcol"|"$seccol
  }
#+END_SRC

You may have noticed that the second line (which had an empty third
column so should not have matched) was also being output when it
shouldn't have.

In any case, the above works for me.

HTH,
eric

-- 
: Eric S Fraga (0xFFFCF67D), Emacs 26.0.50.1, Org release_9.0.4-242-g2c27b8