mfuerstenau

  ZigZag-Encoding
  ---------------
  
  Maps negative values to positive values while going back and
  forth (0 = 0, -1 = 1, 1 = 2, -2 = 3, 2 = 4, -3 = 5, 3 = 6 ...)

  (i >> bitlength-1) ^ (i << 1)

  with "i" being the number to be encoded, "^" being
  XOR-operation and ">>" would be arithemtic shifting-operation

codecontemplator

function print(M, msg) {
  console.log("======" + msg + "=========")
  for(var k=0; k<M.length; ++k) {
    console.log(M[k]);
  }
  console.log("==========================")
}

function diagonalize(M) {
  var m = M.length;