JAVASCRIPT

array change javascript

function solution(inputArray) {
    let counter = 0;
    inputArray.reduce((a, b) => {
        if (a >= b) {
            const diff = a + 1 - b;
            counter += diff;
            return a + 1;
        }
        return b;
    });
    return counter;
}

modify array elements javascript

Using a FOR loop, write a function addNumber which adds the argument n to each 
number in the array arr and returns the updated arr:
const addNumber=(arr, n)=>{  
  let arr1=[];
  for(let i=0;i<Math.max(arr.length);i++){
    arr1.push((arr[i]||0)+n)
  }
  return arr1;
} 
console.log(addNumber([4, 5, 6], 7)); // expected log [11, 12, 13]

modify array js

let newArray = oldArray.map(funcToEachElem);

js array modify element

people[0] = "Georgie";

modify an array in javascript using function method

//Given array
const ar=[1, 2, 3, 4, 5];
//Taking number from user to alter the array
var p=parseInt(prompt());
//Creating function body 
const addNumber=(arr, n)=>{  
    let arr1=[];
    for(let i=0;i<Math.max(arr.length);i++){
      arr1.push((arr[i]||0)+n)
    }
    return arr1;
  } 
//printing old array
  document.write("Old array: "+ar);
//printing new array by calling the function and passing the parametter
  document.write("new array: "+addNumber(ar, p));