如何在Swift中连接两个数组

I have two arrays.

我有两个数组。

let A = ["91","91","49"]
let B = ["9989898909","9089890890","9098979896"]

I need to merge these arrays and show it in the dropdown as

我需要合并这些数组并在下拉列表中显示它

["91 9989898909","91 9089890890","49 9098979896"]

[“91 9989898909”，“91 9089890890”，“49 9098979896”]

How can I get this result using swift.Im newbie to swift,can anyone please help on this.

我如何使用swift得到这个结果。我是swift的新手，有谁可以帮忙解决这个问题。

3 个解决方案

#1

Zip the arrays and concatenate the results:

压缩数组并连接结果：

let A=["91","91","49"]
let B=["9989898909","9089890890","9098979896"]
let zipped = zip(A, B)
let result = zipped.map { $0.0 + " " + $0.1 }

#2

let A = ["91","91","49", "5"]
let B = ["9989898909","9089890890","9098979896"]

Use zip() to join values from both arrays A and B. If A and B have a different number of elements, the joining would still work. then map the tuples from the zipped result array to those elements with a space between them

使用zip（）连接数组A和B的值。如果A和B具有不同数量的元素，则连接仍然有效。然后将压缩结果数组中的元组映射到它们之间有空格的元素

let C : [String] = zip(A,B).lazy.map() {$0 + " " + $1}

The lazy is just to improve the performance for large sequences.

懒惰只是为了改善大型序列的性能。

In your question the third element in C is "91 9098979896" and not "49 9098979896"

在你的问题中，C中的第三个元素是“91 9098979896”而不是“49 9098979896”

#3

here is a snippet in Swift:

这是Swift中的一个片段：

let a = ["90", "91", "92"]
let b = ["80012", "82379", "123712"]

let result: [String] = a.enumerated().map { (index, element) in
    return index < b.count ? element + " " + b[index] : element
}

#1