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Replace spaces with 0's having numeric values.

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# 1  
Old 04-14-2005
Replace spaces with 0's having numeric values.
What could be the regular expression with gsub function in awk to replace all numerics having spaces before to be replaced with 0s?
# 2  
Old 04-15-2005
I don't think you could use gsub() because you don't know the size of the replacement string. Perhaps use match() , e.g...
Code:
  BEGIN {z = "000000000000000000000"}
  {
    while(match($0, / +[0-9]/))
      $0 = substr($0,1,RSTART-1) substr(z,1,RLENGTH-1) substr($0,RSTART+RLENGTH-1)
    print
  }

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