js reverse number array code example
Example 1: reverse number javascript
function reverseNum(n) {
let r = n.toString().split('').reverse().join('');
return Math.sign(n) * parseInt(r);
}
reverseNum(-267);
reverseNum(31522);
-762
22513
Example 2: how to reverse an array in javascript
array = [1 2, 3]
reversed = array.reverse()
Example 3: reverse array javascript
function reverseArray (arr){
if (arr.length === 0){
return []
}
return [arr.pop()].concat(reverseArray(arr))
}
console.log(reverseArray([1, 2, 3, 4, 5]))
Example 4: js reverse number
const reversedNum = num => parseFloat(num.toString().split('').reverse().join('')) * Math.sign(num)