distribution of values from 2 arrays in javascript

jaap klaas 0
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I'm trying to find a way to distribute 2 arrays equally for example I got

let a = [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
let b = [0,0,0,0]

function distrubute(a, b){
//I need help with this function

 return ?
}

let distributed = distribute()

console.log(distributed)
// [0,1,1,1,1,0,1,1,1,1,0,1,1,1,1,0,1,1,1,1]

// this one has to be true:
console.log(distributed.length === a.length)
math javascript
2 Answers
  1. make sure the first parameter is the bigger array
  2. calculate ratio between two arrays
  3. iterate them both, if the iteration index is divided by (ratio + 1) with remainder -> pick a value from the bigger array, else -> pick a value from the smaller array.

Original question answer: 

const a = [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
const b = [0, 0, 0, 0]

function distrubute(a, b) {
  if (a.length < b.length) return distribute(b, a);
  const distributed = [];
  const ratio = a.length / b.length;
  let iA = 0,
    iB = 0;
  while (iA + iB < a.length) {
    distributed.push((iA + iB) % (ratio + 1) > 0 ? a[iA++] : b[iB++]);
  }
  return distributed;
}
const distributed = distrubute(a, b);
console.log(distributed);

Edited question answer: 

const a = [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
const b = [0, 0, 0, 0]

function distrubute(a, b) {
  if (a.length < b.length) return distribute(b, a);
  const distributed = [];
  const ratio = a.length / b.length;
  let iA = 0,
    iB = 0;
  while (iA + iB < a.length + b.length) {
    distributed.push((iA + iB) % (ratio + 1) > 0 ? a[iA++] : b[iB++]);
  }
  return distributed;
}
const distributed = distrubute(a, b);
console.log(distributed);

Dorad0

May another short way

function distribute(a, b) {
    const distance = a.length / b.length + 1;
    return a.map((val, index) => {
        if (index % distance === 0) { return b[index / distance]; }
        else { return val; }
    });
}
// 0,1,1,1,1,0,1,1,1,1,0,1,1,1,1,0

function distribute(a, b) {
    const distance = a.length / b.length;
    return a.flatMap((val, index) => {
        if (index % distance === 0) { return [b[index / distance], val]; }
        else { return val; }
    });
}
// 0,1,1,1,1,0,1,1,1,1,0,1,1,1,1,0,1,1,1,1
userYje70
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