如何将两个数组“合并”在一起？ （逐项连接字符串）

Question

假设我有两个NSString数组：

var firstName = ["Jack", "Sarah", "John"]
var lastName = ["Smith", "Brown", "Doe"]

如何将它们组合成一个看起来像

的数组

var contacts = ["Jack Smith", "Sarah Brown", "John Doe"]

Answer 1

您可以使用Zip2（从中创建一系列对 给定的数组）+ map()：

let firstName = ["Jack", "Sarah", "John"]
let lastName = ["Smith", "Brown", "Doe"]

let contacts = map(Zip2(firstName, lastName)) { $0 + " " + $1 }

Answer 2

您可以以各种方式连接字符串，例如：

var firstStr = "Hello"
var secondStr = "World"

var aStr = firstStr + " " + secondStr // Hello World
var bStr = "\(firstStr) \(secondStr)" // Hello World

在你的情况下，你只需要循环一定的时间（例如，数组的长度，但要确保它们都具有相同的长度）。

var firstName = ["Jack", "Sarah", "John"]
var lastName = ["Smith", "Brown", "Doe"]

var contacts : [String] = []

var len = firstName.count

for index in 0..<len {
    contacts.append("\(firstName[index]) \(lastName[index])")
}