toNegaBinary and toNegaQuaternary

gistfile1.txt

https://en.wikipedia.org/wiki/Negative_base#Calculation

function toNegaBinary( number ) {
    var Schroeppel2 = 0xAAAAAAAA;
    return ( ( number + Schroeppel2 ) ^ Schroeppel2 ).toString(2);
}

function toNegaQuaternary( number ) {
    var Schroeppel4 = 0xCCCCCCCC;
    return ( ( number + Schroeppel4 ) ^ Schroeppel4 ).toString(4);
}

Also..

const negaBinaryToDeci = (arr) => {
  const len = arr.length;
 
  let sum = 0;

  for (let i = 0; i < len; i++) {
    sum += arr[i] * Math.pow(-2, i);
  }
  
  return sum;
}

const deciToNegaBinary = (d) => {
  const result = [];

  while (d != 0) {
    let remainder = d % -2;
    d = Math.ceil(d / -2);
    result.push(Math.abs(remainder));
  }

  return result;
}