Dev Imak Dev Imak - 10 months ago 51
Swift Question

iOS swift remove elements of an array from another array

I have two arrays

var array1 = new Array ["a", "b", "c", "d", "e"]
var array2 = new Array ["a", "c", "d"]

I want to remove elements of array2 from array1

Result ["b", "e"]

Answer Source

The easiest way is to convert both arrays to sets, subtract the second from the first, convert to the result to an array and assign it back to array1:

array1 = Array(Set(array1).subtracting(array2))

Note that your code is not valid Swift - you can use type inference to declare and initialize both arrays as follows:

var array1 = ["a", "b", "c", "d", "e"]
var array2 = ["a", "c", "d"]