如何你理清元组的数组？ [英] How to you sort an Array of Tuples?

问题描述

如何实现（或创建）一个元组列表的数组排序？

以下是从我的code收集。

基本上我创建的元组数组
并通过循环填充它;之后，我试图排序。

  VAR myStringArray：（字符串，整数）[]？ =零
...myStringArray + =（实物，数字）
...myStringArray.sort {$ 0 GT; $ 1}
 

这是X $ C $ç给我，我才建：

  

test.swift：57：9：'（字符串，整数）[]'没有一个名为构件
  排序

解决方案

您有两个问题。首先， myStringArray 是可选，必须将​​解包之前，你可以调用它的方法。其次，没有＆GT; 运营商的元组，你必须做的比较自己

 如果myStringArray {
    myStringArray！的.sort {$ 0.0次== $ 1.0吗？ $ 0.1 GT; $ 1.1：$ 0.0次＆GT; $ 1.0的}
}
 

How do you implement (or create) an array sort of a list of tuples?
The following was gleaned from my code.

Essentially I created an array of tuples and populated it via for loop; after which I tried to sort it.

var myStringArray: (String,Int)[]? = nil
...

myStringArray += (kind,number)
...

myStringArray.sort{$0 > $1}

This is what Xcode gave me before I could build:

test.swift:57:9: '(String, Int)[]?' does not have a member named 'sort'

解决方案

You have two problems. First, myStringArray is an Optional, you must "unwrap" it before you can call methods on it. Second, there is no > operator for tuples, you must do the comparison yourself

if myStringArray {
    myStringArray!.sort { $0.0 == $1.0 ? $0.1 > $1.1 : $0.0 > $1.0 }
}

这篇关于如何你理清元组的数组？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！