JS Built-ins
← Array179 / 226
ArrayArray.prototype.sortintermediate

Array.prototype.sort() — numeric descending

📖 Usage Example
const nums = [3, 1, 4, 1, 5]
nums.sort((a, b) => b - a)  // → [5, 4, 3, 1, 1]

Swap the arguments in the comparator (b - a) to sort numbers in descending order.

Array.prototype.sort() — descending order

To sort numbers in descending order, reverse the comparator: (a, b) => b - a.

Challenge: Implement sortDesc(nums) that sorts a copy of the array in descending numeric order.

sortDesc([3, 1, 4, 1, 5]) // → [5, 4, 3, 1, 1]
sortDesc([10, 9, 2])      // → [10, 9, 2]
💡 Hints (2)
  • • Swapping `a` and `b` in the subtraction flips the sort order.
  • • You can also sort ascending then call `.reverse()`, but `(a, b) => b - a` is cleaner.