ios - 在 Swift 数组的最后一项之前添加单词 "and"

Question

我有一个数组中的项目列表。项目的默认输出是以逗号分隔的简单列表。但是，正确的句子应该在列表的倒数第二个和最后一个项目之间包含单词“and”。

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Swift代码:

    let myItem1: String = "Apple"
    let myItem2: String = "Bee"
    let myItem3: String = "Carrot"
    let myItem4: String = "Dog"

    let myArray = Set(arrayLiteral: myItem1, myItem2, myItem3, myItem4)

    //print("Item count:", myArray.count)
    print("Item list:", myArray.joinWithSeparator(", "))

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输出:

上面的当前输出是:“Apple, Dog, Carrot, Bee”

但是，正确的输出应该是:“Apple, Dog, Carrot and Bee”

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问题:

How can I modify the code so that the output includes the word "and" between the second last and last item in the list?

Answer 1

弹出最后一个元素，然后将其添加到字符串中:

let last = myArray.popLast()

let str =  myArray.joinWithSeparator(", ") + " and " + last!

编辑:

    let myItem1: String = "Apple"
    let myItem2: String = "Bee"
    let myItem3: String = "Carrot"
    let myItem4: String = "Dog"

    let mySetArray = Set(arrayLiteral: myItem1, myItem2, myItem3, myItem4)

    var myArray = Array(mySetArray)

    let last = myArray.popLast()

    let str =  myArray.joinWithSeparator(", ") + " and " + last!
    print(str)