Move All Zeroes in an Array to the End in JavaScript

Problem

We are required to write a JavaScript function that takes in an array of literals that might contain some 0s. Our function should tweak the array such that all the zeroes are pushed to the end and all non-zero elements hold their relative positions.

Example

Following is the code −

 Live Demo

const arr = [5, 0, 1, 0, -3, 0, 4, 6];
const moveAllZero = (arr = []) => {
   const res = [];
   let currIndex = 0;
   for(let i = 0; i < arr.length; i++){
      const el = arr[i];
      if(el === 0){
         res.push(0);
      }else{
         res.splice(currIndex, undefined, el);
         currIndex++;
      };
   };
   return res;
};
console.log(moveAllZero(arr));

Output

Following is the console output −

[
   5, 1, -3, 4,
   6, 0, 0, 0
]