using filter() method in javascript to find largest number in an array

Question

I am new to javascript ,can anyone tell me is it possible to find the largest number in an array, using filter() method ,exclusively filter() method

Possible duplicate of [How might I find the largest number contained in a JavaScript array?](https://stackoverflow.com/questions/1379553/how-might-i-find-the-largest-number-contained-in-a-javascript-array) — Josh, Jul 16 '18 at 14:30
Sorting would work but it's less efficient than simply finding the largest value in a single pass over the array. — Pointy, Jul 16 '18 at 14:33
@charlietfl This sounds like a puzzle question, not about how to do it the best way. — Barmar, Jul 16 '18 at 14:57

score 2 · Answer 1 · answered Jul 16 '18 at 14:53

2

I know this doesn't use filter(), but you can do it with a simple sort() and return the last element.

var arr = [50,40,60,0,10,5];
var max = arr.sort((a,b)=> a-b)[arr.length-1]
console.log(max);

answered Jul 16 '18 at 14:53

Damian Peralta

score 0 · Answer 2 · answered Jul 16 '18 at 14:40

Obviously filter is not the write function for that, but:

Math.max.apply(0, array);

If anyway you want to do this with filter, you can do something like this.

var arr = [...];
var a = arr[0];
var b = arr.filter(function(i){
  if (i > a) {
    a = i;
  }
  return i == a;
});
return b[b.length - 1];

Hassan Sadeghi · Answer 3 · 2018-07-16T15:34:42.510

0

If you want use filter try this:

var A = [-25, 110, 1000, 31, 1,2]/*Your Array*/, max=-Infinity;
A.filter(function(a,b,c){if(a>max)max=a;});
console.log(max);

else, this is another simple way:

console.log([-25, 110, 1000, 31, 1,2].sort(function(a,b){return b-a})[0]);

edited Jul 16 '18 at 15:34

answered Jul 16 '18 at 14:44

Hassan Sadeghi

if i am not wrong, a stands for elements of array ,b for index,c for array but what does d indicates – JustaGamer Jul 16 '18 at 15:14
You are exactly right. d is extra. i forgot to remove it. simple and practical ways. – Hassan Sadeghi Jul 16 '18 at 15:34

3 Answers3