arrays - 数组到字典(无循环)

Question

假设，我有这样的数组:

var array = ["zero","one","two", "three"]

我想将它转换为 Dictionary，但键作为数组元素的索引，值是它自己喜欢的元素:

var dic = [0:"zero", 1:"one", 2:"two", 3:"three"]

Answer 1

您可以使用 Dictionary.uniqueKeysWithValues 和 zip 的组合:

var array = ["zero","one","two", "three"]
var dict = Dictionary(uniqueKeysWithValues: zip(array.indices, array))
print(dict) // [0:"zero", 1:"one", 2:"two", 3:"three"]