Arrays + functions: sort()

You can use `sort()` to sort an array alphabetically:

``````const a = ['b', 'd', 'c', 'a']
a.sort() //['a', 'b', 'c', 'd']
``````

This does not work for numbers, as it sorts for ASCII value (`0-9A-Za-z`)

``````const a = [1, 2, 3, 10, 11]
a.sort() //1, 10, 11, 2, 3

const b = [1, 'a', 'Z', 3, 2, 11]
b.sort() //1, 11, 2, 3, Z, a
``````

You can sort by number value using a custom function:

``````const a = [1, 4, 3, 2, 5]
a.sort((a, b) => (a > b ? 1 : -1)) //1, 2, 3, 4, 5
``````

Reverse the sort order of an array using `reverse()`:

``````a.reverse()
``````

#### Lessons in this unit:

 0: Introduction 1: map() 2: filter() 3: reduce() 4: ▶︎ sort() 5: find() and findIndex() 6: forEach()
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