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Get the max n values from an array in JavaScript
We are required to write a JavaScript function that takes in an array of Numbers as the first argument and a number, say n, as the second argument.
Our function should then pick the n greatest numbers from the array and return a new array consisting of those numbers.
Example
The code for this will be −
const arr = [3, 4, 12, 1, 0, 5, 22, 20, 18, 30, 52];
const pickGreatest = (arr = [], num = 1) => {
if(num > arr.length){
return [];
};
const sorter = (a, b) => b - a;
const descendingCopy = arr.slice().sort(sorter);
return descendingCopy.splice(0, num);
};
console.log(pickGreatest(arr, 3));
console.log(pickGreatest(arr, 4));
console.log(pickGreatest(arr, 5));Output
And the output in the console will be −
[ 52, 30, 22 ] [ 52, 30, 22, 20 ] [ 52, 30, 22, 20, 18 ]
Updated on: 23-Nov-2020
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