I'm currently reading through Apple's "Intro to App Development with Swift" student guide. At the end-quiz of chapter 9, "Types", it asks:
我现在正在阅读苹果公司的“应用程序开发简介”学生指南。在第九章“类型”的最后测验中，题目问:
When you're reading code and aren't sure of the type of a variable or constant, what's the quickest way to find out?
当您正在阅读代码并且不确定变量或常量的类型时，最快的方法是什么?
The answer is:
答案是:
Rewrite the section of code using different encapsulation.
使用不同的封装重写代码段。
However, the concept of encapsulation has not been introduced before so I'm rather confused. In the e-book's Glossary, it states:
但是，封装的概念以前没有介绍过，所以我很困惑。在电子书的词汇表中，它指出:
A language mechanism for restricting access to some of the object components and/or a language construct that facilitates the bundling of data with the methods of operating on that data.
一种语言机制，用于限制对某些对象组件的访问，以及/或一种语言结构，该结构方便将数据与操作该数据的方法捆绑在一起。
Can anyone explain how this relates to finding out about the type of a variable or constant?
有人能解释一下这和发现变量或常数的类型有什么关系吗?
Thanks in advance.
提前谢谢。
1 个解决方案
#1
1
The answer is:
答案是:
Rewrite the section of code using different encapsulation.
使用不同的封装重写代码段。
That's a wrong answer. The right answer is "Use Xcode's [Quick Help] inspector."
这是一个错误的答案。正确的答案是“使用Xcode的[快速帮助]检查器”。
Can anyone explain how this relates to finding out about the type of a variable or constant?
有人能解释一下这和发现变量或常数的类型有什么关系吗?
The suggestion here is that if you rewrite the source to make a private variable public (i.e. change the way it is encapsulated) it would make it easier to find the type of the variable in question.
这里的建议是，如果您重写源代码以使一个私有变量成为公共的(即改变封装的方式)，就可以更容易地找到所涉及的变量的类型。
#1
1
The answer is:
答案是:
Rewrite the section of code using different encapsulation.
使用不同的封装重写代码段。
That's a wrong answer. The right answer is "Use Xcode's [Quick Help] inspector."
这是一个错误的答案。正确的答案是“使用Xcode的[快速帮助]检查器”。
Can anyone explain how this relates to finding out about the type of a variable or constant?
有人能解释一下这和发现变量或常数的类型有什么关系吗?
The suggestion here is that if you rewrite the source to make a private variable public (i.e. change the way it is encapsulated) it would make it easier to find the type of the variable in question.
这里的建议是，如果您重写源代码以使一个私有变量成为公共的(即改变封装的方式)，就可以更容易地找到所涉及的变量的类型。