FrontEndAlgorithm | Largest number freeCodeCamp https://www.freecodecamp.com/challenges/return-largest-numbers-in-arrays

largest-number-freecodecamp.js

function largestOfFour(arr) {
  // You can do this!
  // Override Array Object
  Array.prototype.max = function(){
    piv = 0
    this.forEach((n)=>{
       if(piv<n ) {
         piv = n
       }
    })
    return piv
  }
  var finalResult = []
  arr.forEach((x)=>{
     finalResult.push(x.max())
  })
  console.log(finalResult)
  return finalResult;
}

largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]]);