对象与原语 [英] object vs. primitive

问题描述

最近有一位采访者要求定义对象和基元之间的区别。考虑到所有语言都以原语开头，这似乎是一个奇怪的问题。你会如何回答这个问题？

Recently had an interviewer ask to define the difference between objects and primitives. Seemed like an odd question considering that all languages begin with a primitive. How would you have answered this question?

我还应该注意到这次访谈是针对前端开发职位所以他所指的语言（我假设）是JavaScript。

I should also note that this interview was for a front-end development position so the language (I assume) he was referring to was JavaScript.

推荐答案

基元是一种数据类型，它不包含任何其他数据类型，不能再进一步细分。它就像编程场景中的原子。我说原子是因为原子是物质的基本单位，没有任何东西可以从中得出。

A primitive is a data type that is composed of no other data types and can not be broken down any further. It is like the atoms in the programming scenario. I say atom because atom is a basic unit of matter and there is nothing that can be derived from it.

我的意思是， int 无法细分为较小的数据类型。另一方面，物体可以被认为是由多于一种原始类型组成的分子。例如， string 是C ++标准库的一部分;但是，它是一个对象，它由内部较小的数据类型组成，并包含方法。

I mean, an int in C can not be broken down into smaller data type. An object, on the other hand can be thought of a molecule, consisting of more than one primitive type. For example, string comes as part of the C++ standard library; however, it is an object and it is composed of smaller data types internally and contains methods.

重要的是要注意并非所有面向对象的语言都是基于类的（例如Javascript）你不能在Javascript中定义一个类，所以一个对象是完全不同的这里。即使Javascript中的所有内容都是对象（也是Ruby），Number对象实际上是内部基元的包装器。

It is important to note that not all object-oriented languages are class based (eg. Javascript) You can not define a class in Javascript, so an object is quite different here. Even though everything in Javascript is an object (Ruby also), the Number object is really a wrapper for an internal primitive.

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