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. jmeter 获取总的线程数

    String threads="${__BeanShell(ctx.getThreadGroup().getNumThreads())}"; vars.put("thre ...

  2. DispatcherServlet 是 spring 网络模块的核心

    https://cn.bing.com/images/search?q=DispatcherServlet+&FORM=HDRSC2

  3. 规则引擎drools封装

    一.前言 网上规则引擎drools介绍很多,并且有很多细致的说明,作者也不敢托大说自己的好用,但作者经过2个项目使用过规则引擎后,自己对规则引擎的理解并进行封装,对规则内容及如何使用,有自己的一番实践 ...

  4. VS2019+EF6连接Mysql

    开发环境:Win10 + VS2019Mysql服务器版本:8.0.16 一.下载并安装插件(必备) MySQL-Connector-net-6.9.12  链接https://cdn.mysql.c ...

  5. Git 解决合并分支时的冲突

    参考链接:https://www.liaoxuefeng.com/wiki/896043488029600/900004111093344 创建分支时,新分支的文件内容建立在原分支的基础上,我们称这时 ...

  6. only size-1 arrays can be converted to Python scalars

    python版本:3.6.5 opencv版本:3.2.0 使用的jupyter notebook 源码如下: import cv2 import numpy as np import matplot ...

  7. drf之组件（认证、权限、排序、过滤、分页等）和xadmin、coreapi

    认证Authentication 可以在配置文件中配置全局默认的认证方案 REST_FRAMEWORK = { 'DEFAULT_AUTHENTICATION_CLASSES': ( 'rest_fr ...

  8. 使用DES算法实现加密解密

    使用DES算法实现加密解密 我们常见的加密算法有DES.MD5.IDEA.AES等等,这篇随笔介绍使用DES算法实现加密解密 首先介绍一下DES算法: DES算法为密码体制中的对称密码体制,又被称为美 ...

  9. 含有动态未知字段的 JSON 反序列化

    一般来说,正常的 json 长这个模样: { 'Name': 'Bad Boys', 'ReleaseDate': '1995-4-7T00:00:00', 'Genres': [ 'Action', ...

  10. React Children 使用

    React 有一个特殊的属性children, 主要用于组件需要渲染内容,但它并不知道具体要渲染什么内容,怎么会有这种使用场景?确实比较少,但并不是没有,比如弹出框.当你写一个弹出框组件的时候,你知道 ...