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Help needed in unix commands

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Top Forums Shell Programming and Scripting Help needed in unix commands
# 1  
Old 09-01-2010
Help needed in unix commands
i define a function outside the nawk command which trims the leading and trailing spaces like

Code:
  function TrimSpace(x)
  {
    y=gsub(/^[ \t]+|[ \t]+$/,"",x)
    {
      return x
    }
  }

and i want to call this function in nawk commad like.

Code:
 
nawk '{print TrimSpace($1)}' file

Note: this function works fine if i define it within nawk.You may use your any dumy function for testing.
If it is possible to call any outside function in nawk? and if yes,how to accomplish it

Moderator's Comments:
Mod Comment Your 2nd question has been removed since it is already an own thread in this forum. Either have it in here as 2nd question or have it as an own thread but not both. This is double posting which is not allowed to the rules of the forum. So your 2nd question has been stripped away by me - there is still your other thread with exactly the same question in it.
Last edited by zaxxon; 09-01-2010 at 03:57 AM..
# 2  
Old 09-01-2010
Better to define the function inside the awk.
something like:


Code:
$ cat y
test,   test2,   test3   ,test4
test,   test2,   test3   ,test4
test,   test2,   test3   ,test4
test,   test2,   test3   ,test4
$ 
$ 
$ 
$ cat mm
awk -F, '

function TrimSpace(mystr)
 {
  tstr=mystr;
  sub(/^[ \t\n]*/,"",tstr);
  sub(/[ \t\n]*$/,"",tstr);
  return tstr
 }

{print TrimSpace($2)}' y
$ 
$ 
$ 
$ ./mm
test2
test2
test2
test2
$

# 3  
Old 09-01-2010
Quote:
Originally Posted by anchal_khare
Better to define the function inside the awk.
something like:


Code:
$ cat y
test,   test2,   test3   ,test4
test,   test2,   test3   ,test4
test,   test2,   test3   ,test4
test,   test2,   test3   ,test4
$ 
$ 
$ 
$ cat mm
awk -F, '
 
function TrimSpace(mystr)
 {
  tstr=mystr;
  sub(/^[ \t\n]*/,"",tstr);
  sub(/[ \t\n]*$/,"",tstr);
  return tstr
 }
 
{print TrimSpace($2)}' y
$ 
$ 
$ 
$ ./mm
test2
test2
test2
test2
$

thanks for reply

but actually i want to know the possibility of calling an outside function within nawk
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