freeCodeCamp Challenge Guide: Set consolidation

Guide
1

Set consolidation

Solutions

Solution 1 (Click to Show/Hide) 
function setConsolidation(sets) {
  function addAll(l1, l2) {
    l2.forEach(function(e) {
      if (l1.indexOf(e) == -1) l1.push(e);
    });
  }

  function consolidate(sets) {
    var r = [];
    for (var i = 0; i < sets.length; i++) {
      var s = sets[i];
      {
        var new_r = [];
        new_r.push(s);
        for (var j = 0; j < r.length; j++) {
          var x = r[j];
          {
            if (
              !(function(c1, c2) {
                for (var i = 0; i < c1.length; i++) {
                  if (c2.indexOf(c1[i]) >= 0) return false;
                }
                return true;
              })(s, x)
            ) {
              (function(l1, l2) {
                addAll(l1, l2);
              })(s, x);
            } else {
              new_r.push(x);
            }
          }
        }
        r = new_r;
      }
    }
    return r;
  }

  function consolidateR(sets) {
    if (sets.length < 2) return sets;
    var r = [];
    r.push(sets[0]);
    {
      var arr1 = consolidateR(sets.slice(1, sets.length));
      for (var i = 0; i < arr1.length; i++) {
        var x = arr1[i];
        {
          if (
            !(function(c1, c2) {
              for (var i = 0; i < c1.length; i++) {
                if (c2.indexOf(c1[i]) >= 0) return false;
              }
              return true;
            })(r[0], x)
          ) {
            (function(l1, l2) {
              return l1.push.apply(l1, l2);
            })(r[0], x);
          } else {
            r.push(x);
          }
        }
      }
    }
    return r;
  }

  function hashSetList(set) {
    var r = [];
    for (var i = 0; i < set.length; i++) {
      r.push([]);
      for (var j = 0; j < set[i].length; j++)
        (function(s, e) {
          if (s.indexOf(e) == -1) {
            s.push(e);
            return true;
          } else {
            return false;
          }
        })(r[i], set[i].charAt(j));
    }
    return r;
  }

  var h1 = consolidate(hashSetList(sets)).map(function(e) {
    e.sort();
    return e;
  });
  return h1;
}
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