ios - Filter two arrays Swift -

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i have 1 empty array , 2 arrays data

var resultsarray = [string]()  var array1 = ["1","2","2","3","4"] var array2 = ["1","2","2","3","4","5","6"]

my goal append resultsarray elements array2 don't match array1 ("5" , "6" in example).

what's subtlest way so?

thank you.

use filter function

var resultsarray = [string]()  let array1 = ["1","2","2","3","4"] let array2 = ["1","2","2","3","4","5","6"]  let filteredarray = array2.filter{ !array1.contains($0) }  resultsarray.appendcontentsof(filteredarray)

if collections contain unique items consider use set rather array


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