Today we’re going to look at how to sort arrays (and numbered arrays) in JavaScript. Finally, we’ll see how to sort arrays containing objects by adding an attribute, such as priority or order, to display these objects in the desired order.
Array.prototype.sort() is a comparison function used to sort elements of an array.
The arguments of this function are:
compareFunction(a, b) < 0: a comes before b
compareFunction(a, b) > 0: b comes before a
compareFunction(a, b) = 0: the order of a and b is identical.
Examples (descending and ascending sorting):
const array = [1, 20, 8, 15, 25, 80, 100, 200];
// sort in descending order
array.sort((a, b) => b – a);
console.log(array);
// sort in descending order
array.sort((a, b) => b – a);
console.log(array);
const array = [1, 20, 8, 15, 25, 80, 100, 200];
// sort in ascending order
array.sort((a, b) => a – b);
console.log(array);
// sort in ascending order
array.sort((a, b) => a – b);
console.log(array);
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