13 Useful Array Methods in Swift

Use Swift’s built-in array methods to make your life easier and code prettier

Photo by Blake Connally on Unsplash.

An array is a commonly used data type in Swift. It is like a list in which you store items (for example numbers). You are going to use arrays a lot as an iOS engineer.

To help you master arrays and improve your code, I wrote this guide that shows you built-in array methods and examples.

1. Array.filter()

Instead of creating a loop, you can use the array’s built-in filter() method to filter elements to a new array.

For instance, let’s filter numbers lower than or equal to 3 to a new array:

Output:

[1,2,3]

2. Array.map()

The map() method takes each value of an array, performs some action on it, and finally places the new value into a new array. This is handy and can be used instead of a for or while loop.