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apply a function twice successively with the same input in awk program

 
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# 15  
Old 09-22-2012
Code:
BEGIN {conv["ab"]="1"; conv["bc"]="2"; conv["cd"]="3"; conv["de"]="4"; conv["ef"]="5"}


function convert(str){
   os="";
   for (i=1; i<=length(str); i++) {
      o=conv[substr(str,i,2)];
      if (length(o)<1) o="X";
      os=os o;
   }
   return os;
}

{ $1 = convert($1);
   print $1}

# 16  
Old 09-22-2012
Thanks rdrtx1 for your help !

Unfortunately, when using this input:
Code:
abcdef

your code returns:
Code:
12345X

instead of:
Code:
135     # start conversion from the 1st letter of the input (i.e. abcdef)
24X     # start conversion from the 2nd letter of the input (i.e. bcdef)
35     # start conversion from the 3rd letter of the input (i.e. cdef)
4X     # start conversion from the 4th letter of the input (i.e. def)
5    # start conversion from the 1st letter of the input (i.e. ef)

In your code you write (line 8):
Code:
if (length(o)<1) o="X"

but the script has to return an "X" only if the substring (i.e. the block of 2 letters that you called "o") is not part of the "conv" array indices.

Thanks anyway !
 
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