Question

我想用数据填充字典，所以它看起来像这样： 1：苹果公司 2：香蕉 3：柠檬

对不起，如果这对你们大多数人来说太简单了 - 我只是个初学者。无论如何，这是代码：

var listOfFruit = ["Apple", "Banana","Lemon"]
var key = [1,2,3]
var dictionary = [Int: [String]]()
func createDictionary(){

for index in key {
    dictionary[index] = []
    var listOfFruit = ["Apple", "Banana","Lemon"]
    for index1 in listOfFruit{
        dictionary[index]?.append(index1)
    }
}
}
print(dictionary)

以上结果是＆＃34; [：] \ n＆＃34;在我的操场上。

Answer 1

创建字典的功能方法可能如下所示：

let dictionary = zip(listOfFruit, key).map { [$1: $0] }
print(dictionary)
// [[1: "Apple"], [2: "Banana"], [3: "Lemon"]]

Answer 2

var listOfFruit = ["Apple", "Banana","Lemon"]
var key = [1,2,3]
var dictionary = [Int: String]()

func createDictionary(){
    for (index, value) in key.enumerate() {
        dictionary[value] = listOfFruit[index]
    }
}

createDictionary()

print(dictionary)

Answer 3

let listOfFruit = ["Apple", "Banana","Lemon"]
let key = [1,2,3]
var dictionary = [Int: String]()
func createDictionary(){
    var i = 0
    while i < listOfFruit.count {
        dictionary[key[i]] = listOfFruit[i]
        i += 1
    }
}
createDictionary()
print(dictionary)

注意换行：

var dictionary = [Int：[String]]（）

为：

var dictionary = [Int：String]（）

并使用变量i从每个数组中获取相同的索引。

用数据填充字典

3 个答案: