Code to add fuzzy numbers

FuzzyAdd.coffee

#Input fuzzy number. Possibility distribution
pos = {
  156: 0,
  157: 0.25,
  158: 0.5,
  159: 0.75,
  160: 1,
  161: 1,
  162: 1,
  163: 1,
  164: 1,
  165: 1,
  166: 0.75,
  167: 0.5,
  168: 0.25,
  169: 0
};

FuzzyAdd = (a, b, collapsed) ->
  out = {};
  if not collapsed?
    collapsed = true;

  for ka,va of a
    for kb,vb of b
      kai = parseInt(ka);
      kbi = parseInt(kb);

      key = kai+kbi;
      key = key.toString();

      if(collapsed)
        if(key of out)
          out[key] = Math.max(Math.min(va,vb), out[key])
        else
          out[key] = Math.min(va,vb)
      else
        if(key not of out)
          out[key] = [];
        out[key].push(Math.min(va,vb));
  return out

FuzzyPrettyPrint = (result) ->
  collapsed = false;
  keys = Object.keys(result);
  if (typeof result[keys[0]] == "number")
    collapsed = true
  keys = keys.map (i) ->
    +i #parseint


  min = Math.min.apply(null, keys)
  max = Math.max.apply(null, keys)
  mid = min+(max-min)/2
  prevlen = undefined;
  counter = 2;

  for k, v of result
    sp = ""
    if (v.length <= prevlen and not collapsed)
      sp = Array(counter++).join("\t");
    prevlen = v.length
    console.log("%d%s\t%s", k, sp, if collapsed then v else v.join('\t'));#.join('\t')

# We are doing a tripple add here pos + pos + pos
first = FuzzyAdd(pos, pos, true)
secon = FuzzyAdd(pos, first, false)

FuzzyPrettyPrint(secon)