Inspired by Wikipedia...

In type theory terms;

  • A type is an abstract interface.
    Types generally represent nouns, such as a person, place or thing, or something nominalized,
  • A class represents an implementation of the type.
    It is a concrete data structure and collection of subroutines
    Different concrete classes can produce objects of the same abstract type (depending on type system).

An object can have many types, and objects of different classes can have the same type.

https://stackoverflow.com/questions/468145/what-is-the-difference-between-type-and-class

what-is-the-difference-between-type-and-class的更多相关文章

  1. ansible 配置文件设置

    目录 ansible 配置文件设置 一.ansible configuration settings 二.ansible 配置文件查找顺序(从上到下,依次查找) 三.附录ansible配置参数 ans ...

  2. Swift - what's the difference between metatype .Type and .self?

    Declaration typealias AnyClass = AnyObject.Type .Type The metatype of a class, structure, or enumera ...

  3. Type difference of character literals in C and C++

    Every literal (constant) in C/C++ will have a type information associated with it. In both C and C++ ...

  4. [C/CPP系列知识] Type difference of character literals 和 bool in C and C++

    C/C+中的每一个常亮(every literal)都是有类型的,例如10 就是int型的,因此siziof(10)和sizeof(int)是相同的,但是字符型常亮(‘a’)在C和C++中有不同的变量 ...

  5. [转载]Difference between <context:annotation-config> vs <context:component-scan>

    在国外看到详细的说明一篇,非常浅显透彻.转给国内的筒子们:-) 原文标题: Spring中的<context:annotation-config>与<context:componen ...

  6. On One Side Kolmogorov Type Inequalities

    Let \(X_1,X_2,\ldots,X_n\) be independent random variables. Denote \[S_n=\sum_{i=1}^n X_i.\] The  we ...

  7. what's the difference between dim as and dim as new?

    what's the difference between dim as and dim as new? There is no difference with value types (Intege ...

  8. window date type

    Most string operations can use the same logic for Unicode and for Windows code pages. The only diffe ...

  9. input type="submit" 和"button"有什么区别？

    http://www.zhihu.com/question/20839977 在一个页面上画一个按钮,有四种办法: <input type="button" /> 这就 ...

  10. 4、Type fundamentals

    1.All Types Are Derived from System.Object The CLR requires all objects to be created using the new ...

随机推荐

  1. AJAX -------------- 如何使用ajax

    AJAX  即“Asynchronous JavaScript and XML”(异步的JavaScript 与 XML技术 ),指的是一套综合了多项技术的浏览器端网页开发技术. 所谓为的异步交互:指 ...

  2. pip install 时报错 pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.

    pip install 时报错: pip is configured with locations that require TLS/SSL, however the ssl module in Py ...

  3. 2、Vue构造器和扩展

    1.VUE构造器简介 VUE构造器是一个非常重要的语法. 每个Vue.js应用都是通过构造函数Vue创建一个根实例. New了Vue对象,然后调用了这个vue对象的构造器,并向构造器传入了数据. 在实 ...

  4. Windows定时清理文件处理脚本

    一.运行CMD,输入forfile/?,即可获取forfile的使用方法 /P  路径 /M  文件类型 /D  时间   + | -     +:之后    - :之前   example:-2   ...

  5. Django---FORM组件.FORM组件的字段,FORM组件校验流程,FORM组件的全局和局部钩子,FORM和Model的组合

    Django---FORM组件.FORM组件的字段,FORM组件校验流程,FORM组件的全局和局部钩子,FORM和Model的组合 一丶FORM的介绍 1.生成页面可用的HTML标签 2.对用户提交的 ...

  6. kylin安装过程问题排查

    问题:日志报错:/usr/local/apps/kylin/tomcat/conf/.keystore (没有那个文件或目录) 解决:在kylin内置tomcat的server.xml中里边有个对ht ...

  7. 聊一下domain和entity

    这段时间在负责海外事务,今天带着客户端走海外商店的支付流程.因为在国内接的大多数是渠道聚合的SDK,客户端就很少关注支付业务流程,只是按照以前的接的demo然后按照渠道提供的参数就直接上了.先po一张 ...

  8. 修改docker容器参数

    创建容器时没有添加参数  --restart=always ,导致的后果是:当 Docker 重启时,容器未能自动启动. docker container update --restart=alway ...

  9. JavaScript之变量（声明、解析、作用域）

    声明(创建) JavaScript 变量 在 JavaScript 中创建变量通常称为"声明"变量. 一.我们使用 var 关键词来声明变量: var carname; 变量声明之 ...

  10. 从一道题看js的拆箱操作

    前段时间看到一道题,如下:([][[]]+[])[+![]]+([]+{})[!+[]+![]]问最终打印结果,然后简单了解一下js的装箱,拆箱操作. 基本 装箱操作: 就是将基本类型(String, ...