如何在Swift中将数组拆分成两半? [英] How to split an array in half in Swift?

问题描述

如何拆分一副纸牌?我有一个阵列，有一个随机的发牌人，但不知道如何拆分卡组.

How do I split a deck of cards? I have an array made and a random card dealer, but have no idea how to split the deck.

感谢大家的帮助！我现在有一个工作卡应用程序，确实遇到了其他问题，但是很快就解决了.

Thanks everyone for the help! I now have a working card app, did run into other problems but they were solved quickly.

推荐答案

您可以进行扩展，使其可以返回由两个数组组成的数组，并使用Ints，String等:

You can make an extension so it can return an array of two arrays, working with Ints, Strings, etc:

extension Array {
    func split() -> [[Element]] {
        let ct = self.count
        let half = ct / 2
        let leftSplit = self[0 ..< half]
        let rightSplit = self[half ..< ct]
        return [Array(leftSplit), Array(rightSplit)]
    }
}

let deck = ["J", "Q", "K", "A"]
let nums = [0, 1, 2, 3, 4]

deck.split() // [["J", "Q"], ["K", "A"]]
nums.split() // [[0, 1], [2, 3, 4]]

但是返回一个命名的元组甚至更好，因为它强制执行以下事实:您期望结果恰好有两个数组:

But returning a named tuple is even better, because it enforces the fact that you expect exactly two arrays as a result:

extension Array {
    func split() -> (left: [Element], right: [Element]) {
        let ct = self.count
        let half = ct / 2
        let leftSplit = self[0 ..< half]
        let rightSplit = self[half ..< ct]
        return (left: Array(leftSplit), right: Array(rightSplit))
    }
}

let deck = ["J", "Q", "K", "A"]

let splitDeck = deck.split()
print(splitDeck.left) // ["J", "Q"]
print(splitDeck.right) // ["K", "A"]

注意:积分归因于Andrei和Qbyte提供的第一个正确答案，我只是添加信息.

这篇关于如何在Swift中将数组拆分成两半?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！