筛选两个数组Swift [英] Filter two arrays Swift

问题描述

我有一个空数组和两个包含数据的数组

  var resultsArray = [String]（）
 
 var array1 = [1，2，2，3，4] 
 var array2 = [1，2，2，3 ，我的目标是追加<$> c $ c $> resultsArray 与元素 array2 不匹配 array1 （例子中的5和6）。 
 
 
 
 
 $ b 
谢谢。
 使用过滤器函数
  var resultsArray = [String]（）
 
让array1 = [1，2，2，3，4] 
让array2 = [1，2，2，3，4，5，6] 
 
 let filteredArray = array2.filter {！array1 .contains（$ 0）} 
 
 resultsArray.appendContentsOf（filteredArray）
  
集合包含独特的项目考虑使用集合而不是数组 
 
I have one empty array and two arrays with data
var resultsArray = [String]()

var array1 = ["1","2","2","3","4"]
var array2 = ["1","2","2","3","4","5","6"]
My goal is to append the resultsArray with the elements from array2 that don't match array1 ("5" and "6" in the example). 

What's the subtlest way to do so?

Thank you.
解决方案
Use the 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 the collections contain unique items consider to use Set rather than Array

                        
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