Sort arrays in place:
let fruits = ["cherry", "apple", "banana"]
fruits.sort()
console.log(fruits) // ["apple", "banana", "cherry"]
// Numbers need a compare function!
let nums = [10, 2, 30, 1]
nums.sort() // Wrong: [1, 10, 2, 30] (string sort)
nums.sort((a, b) => a - b) // Right: [1, 2, 10, 30]
Without a compare function, elements are converted to strings. For numbers, always provide (a, b) => a - b.