Layer 1: 单一对象 粗略的说, 在javascript中所有对象都是maps的键值对. 键值对的实体在对象中称为属性( property).属性的key经常为 string类型,而他的value则可以是任何类型包括函数(function). 方法也可以作为函数的值充当属性. 属性的种类(Kinds of Properties) 3种属性的种类: 数据属性(Properties or named data properties) javascript对象中的常见的属性键值对(mapping…

javascript面向对象编程有几个层面: 1: 单一对象 (covered in Layer 1: Single Objects) 2: 对象之间的 prototype  (described inLayer 2: The Prototype Relationship Between Objects) 3: 类似于在其他编程语言中为接口提供构造器工厂 (discussed in Layer 3: Constructors—Factories for Instances) 4: 超类,通过继承…

DesktopGood performance is critical to the success of many games. Below are some simple guidelines for maximizing the speed of your game's graphical rendering. 好的性能,是很多游戏成功 的关键.下面是一些简单的指引,最大限度地提高你的游戏图形渲染速度. Optimizing Meshes 优化网格You only pay a render…

XTools Pro 是一套为ArcGIS平台设计的矢量空间分析. 形状转换和表管理扩展工具,大大增强了 ArcGIS 的功能,使用该工具能够提高 ArcGIS 用户的效率和性能. XTools Pro 包括矢量空间分析. 形状转换. 并表管理的 70 多个工具和超过 40 地理处理工具.在一个单一的工具栏为 ArcGIS 用户收集的最基本的功能.新的实用工具有助于节省您的时间和提高工作效率! 该工具相当于把ArcGIS Desktop平台软件更加的实用化,业务化,更贴合用户的应用,非常多相似的…

详见:http://blog.yemou.net/article/query/info/tytfjhfascvhzxcytp27 说说 DWRUtil 比如我们从服务器端获得了一个citylist的数据,要把这些数据放到id为city的一个下拉列表中,它有这么两个属性id ,name.我们要用id作为下拉列表的value,name作为下拉列表的text,那么需要这么写       DWRUtil.removeAllOptions("city");       DWRUtil.addOp…

A Absolute Mode Transform Type-in绝对坐标方式变换输入 Absolute/Relative Snap Toggle Mode绝对/相对捕捉开关模式 ACIS Options ACIS选项 Activate活动:激活 Activate All Maps激活全部贴图 Activate Grid激活栅格.激活网格 Activate Grid Object激活网格对象:激活网格物体 Activate Home Grid激活主栅格:激活主网格 ActiveShade实时渲染…

转载自: https://www.cnblogs.com/ningskyer/articles/3615312.html 0.分类 创建型模式 1.FACTORY2.BUILDER3.FACTORY METHOD  4.PROTOTYPE  5.SINGLETON 结构型模式 6.ADAPTER  7.BRIDGE 8.COMPOSITE  9.DECORATOR 10.FACADE  11.FLYWEIGHT  12.PROXY行为模式 13.CHAIN OF RESPONSIBLEITY  …

Back to Design Patterns Streamline Your App with Design Patterns 用设计模式精简你的应用程序 In Objective-C programming, one way to add behavior specific to your app is through inheritance. You create a subclass of an existing class that either augments the attrib…

FIELD OF THE DISCLOSURE The subject matter of the present disclosure relates to a framework for handling graphics animation and compositing operations for a graphical user interface of a computer system application. BACKGROUND OF THE DISCLOSURE Mac O…

转自: https://www.infoq.com/articles/advanced-architecture-aspnet-core ASP.NET Core's new architecture offers several benefits as compared to the legacy ASP.NET technology ASP.NET Core benefits from incorporating support for dependency injection from t…

原文链接,大部分是机器翻译,仅做了小部分修改.英.中文对照,看不懂的看英文. Data binding overview in WPF 2019/09/19 Data binding in Windows Presentation Foundation (WPF) provides a simple and consistent way for apps to present and interact with data. Elements can be bound to data from a…

1.把鼠标停在sql所在行,然后ctrl+Enter直接执行当前sql. 2.解决Toad对中文显示乱码问题(如果数据库所在主机的NLS_LANG是AMERICAN_AMERICA.WE8ISO8859P1):系统环境变量加 NLS_LANG=AMERICAN_AMERICA.WE8ISO8859P1 3.toad中自动提示功能,就像plsql developer那样:输入表名前几个字母,然后用Ctrl + .就可以弹出,如你输入select * from emp t where t. 这时候停…

原文:http://www.cnblogs.com/yanhaijing/p/3685304.html 这是我所知道的最完整最简洁的JavaScript基础教程. 这篇文章带你尽快走进JavaScript的世界——前提是你有一些编程经验的话.本文试图描述这门语言的最小子集.我给这个子集起名叫做“JavaScript简易教程”,并推荐准备深入阅读细节和高级技巧之前的新手阅读.心急吃不了热豆腐.文章的最后提出如何进一步学习. 警告:下面是我所描述的规则集和最佳实践.我喜欢整洁清晰(例如,你可以随时通…

  The Composing a XAML Clip Art Scene posting showed how you could layer multiple drawing objects in an XAML file. The sample XAML file in that posting used the default z-order behavior of objects in a collection. One of the changes made in WPF Beta…

[MecAnim] MecAnim是Unity 4.0推出的新的动画系统,新系统使用Animator组件来控制动画,老系统使用Animation组件来控制动画.此篇讲述MecAnim系统. What is rigging & skinning? How many terminology does MecAnim has? 1.Animator & Animator Controller. 2.Retargeting.(Through Animator Controller) 3.Avata…

1.重新设置板子的形状 Design ---->Board Shape---->Redefine Board Sharp 2.通过Board Options 对板子进行设置 3.添加一个新的图纸,可以添加模板 File-->Open -->Altium Designer 13-->Template-->A4.Pcb 4.电路板的分层 Signal Layers信号层,主要完成电气连接 Internal Planes:内部电源和地层 Mechanical Layers:机…

http://guides.rubyonrails.org/active_record_querying.html ✅How to find records using a variety of methods and conditions. ✅How to specify the order, retrieved attributes,grouping, and other properties of the found records. ✅ How to use ).offset(30)将返…

Introduction Layering of an application's codebase is a widely accepted technique to help reduce complexity and improve code reusability. To achieve layered architecture, ASP.NET Boilerplate follows the principles of Domain Driven Design. 分层应用程序的代码是一…

安装 TensorFlow 2.0 Alpha 本文仅仅介绍 Windows 的安装方式: pip install tensorflow==2.0.0-alpha0 # cpu 版本 pip install tensorflow==2.0.0-alpha0 # gpu 版本 针对 GPU 版的安装完毕后还需要设置环境变量: SET PATH=C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.0\bin;%PATH% SET PATH=C…

这是我所知道的最完整最简洁的JavaScript基础教程. 这篇文章带你尽快走进JavaScript的世界——前提是你有一些编程经验的话.本文试图描述这门语言的最小子集.我给这个子集起名叫做“JavaScript简易教程”,并推荐准备深入阅读细节和高级技巧之前的新手阅读.心急吃不了热豆腐.文章的最后提出如何进一步学习. 警告:下面是我所描述的规则集和最佳实践.我喜欢整洁清晰(例如,你可以随时通过下面的目录快速导航).规则是无懈可击的,但不可避免——每个人的理解不同. 目录 1. 本文约定 2.…

现在在企业中,操作oracle数据库的客户端,除了PL/SQL外,使用的较多的就是TOAD了!toad记得F9执行全部sql和Ctrl + Enter执行选中sql就行了,有啥需要的再查吧.快捷设置在View -- Option -- Toolbars/Menus -- Shotcuts,toad管快捷键叫shotcut,一开始找key这样的字眼没找到. 补充一下,toad模式DBMS Output是(disabled),要启用的话在DBMS Output的tab页左上角有个红色的按钮,启用就可…

I am getting an Out Of Memory exception in my c# application when the memory usage for the application goes over about 1.3GB. I had this same problem on a 32-bit machine with 3gb of memory and it made sense back then, but now I upgraded the hardware…

C++ Core Guidelines September 9, 2015 Editors: Bjarne Stroustrup Herb Sutter This document is a very early draft. It is inkorrekt, incompleat, and pµøoorly formatted. Had it been an open source (code) project, this would have been release 0.6. Copy…

Syntax SET HANDLER handler1 handler2 ... FOR { oref |{ALL INSTANCES} }                                   [ACTIVATION act]. Extras: 1. ... FOR oref 2. ... FOR ALL INSTANCES 3. ... ACTIVATION act Effect This statement registers the event handlers handl…

Introduction Whilst JSON is a compact and easy to read cross-language storage and data exchange format, the flexibility that it offers sometimes requires some custom handling to parse the data. If you are not familiar with JSON, then here is a defini…

Object Pascal 参考手册 (Ver 0.1)ezdelphi@hotmail.com OverviewOverview(概述)Using object pascal(使用 object pascal)Object Pascal 是一种高级编译语言,具有强类型(对数据类型的检查非常严格)特性,支持结构化和面向对象编程.它的优点包括代码的易读性.快速编译,以及支持多个单元文件从而实现模块化编程.Object Pascal 具有一些特性以支持 Borland 组件框架和 RAD(快速应用程…

http://www.bogotobogo.com/cplusplus/memoryallocation.php Variables and Memory Variables represent storage space in the computer's memory. Each variable presents a convenient names like number or result in the source code. Behind the scenes at runtime…

lazy概念:要用到的时候,再去加载,对于关联的集合来说,只有当访问到的时候,才去加载它所关联的集合,比如一个user对应很多权限,只有当user.getRights()的时候,才发出select right的语句,在访问到rights之前,rights是一个PersisitSet对于实体类来说,只有当它的属性被访问到时,才会真正加载这个实体类,在它的属性没有被访问到之前,这个实体类是一个代理对象. 1.在集合中定义:<set><list>标签上 ,可以取值:true/false/…

基于 https://gamedevelopment.tutsplus.com/tutorials/quick-tip-use-quadtrees-to-detect-likely-collisions-in-2d-space--gamedev-374 quadtree-js This is a JavaScript Quadtree implementation of the Java Methods described in this tutorial:http://gamedev.tuts…

Although using the object constructor or an object literal are convenient ways to create single objects, there is an obvious downside: creating multiple objects with the same interface requires a lot of code duplication. To solve this problem, develo…