问如果两个数组包含相同的元素，不管这些元素的出现顺序如何，我如何在Swift中签入这些元素？

EN

  array1.sortInPlace()
  array2.sortInPlace()

  print(array1,array2)

  if array1 == array2 {
    print("equal")
  } else {
  print("not equal") 
  }

 let sorted1 = array1.sort()
 let sorted2 = array2.sort()

  if sorted1 == sorted2 {
    print("equal")
  }else {
    print("not equal")
  }

let array1 = ["a", "b", "c"]
let array2 = ["b", "c", "a", "c"]

let set1 = Set(array1)
let set2 = Set(array2)

if (set1.count == set2.count && set1 == set2) { //if you compare big sets it is recommended to compare the count of items in the sets beforehand
    //they are identical
}

func containSameElements(var firstArray firstArray: [String], var secondArray: [String]) -> Bool {
    if firstArray.count != secondArray.count {
        return false
    } else {
        firstArray.sortInPlace()
        secondArray.sortInPlace()
        return firstArray == secondArray
    }
}

var array1 = ["a", "a", "b"]
var array2 = ["a", "b", "a"]

var array3 = ["a", "b", "c"]
var array4 = ["b", "c", "a", "d"]

print(containSameElements(firstArray: array1, secondArray: array2)) //true
print(containSameElements(firstArray: array3, secondArray: array4)) //false
print(array1) //["a", "a", "b"]
print(array2) //["a", "b", "a"]
print(array3) //["a", "b", "c"]
print(array4) //["b", "c", "a", "d"]