添加单词“和".在Swift中数组的最后一项之前 [英] Adding the word "and" before the final item of an array in Swift

问题描述

我有一个数组中的项目列表.项目的默认输出是一个简单列表，以逗号分隔.但是，适当的句子将在列表中倒数第二个和最后一个项目之间包含单词和" .

I have a list of items in an array. The default output of the items is a simple list separated by commas. However, a proper sentence would include the word "and" between the second last and last item in the list.

快捷代码:

    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(", "))

---

输出:

上面的当前输出是:苹果，狗，胡萝卜，蜜蜂"

The current output above is: "Apple, Dog, Carrot, Bee"

但是，正确的输出应该是:苹果，狗，胡萝卜 和 蜜蜂"

However, the proper output should be: "Apple, Dog, Carrot and Bee"

问题:

如何修改代码，以使输出包含单词和" 在列表中的倒数第二个和最后一个项目之间?

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

推荐答案

弹出最后一个元素，然后稍后将其添加到字符串中:

Pop the last element and then add it onto the string later:

let last = myArray.popLast()

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

    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)

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