ECMAScript variables may contains two different types of data: primitive values and reference values. Primitive values are simple atomic pieces of data, while reference values are objects that may be made up of multiple values. The five primitive typ…
http://hzjavaeyer.group.iteye.com/group/wiki?category_id=283 上面这个url非常适合javascript初学者阅读,感谢原作者的分享 什么是script? A script is a series of instructions that a computer can follow to achieve a goal. A browser may use different parts of the script depending o…
When it's the case that each instance of the class is equal to only itself. 1. Each instance of the class is inherently unique. 2. You don't care whether the class provides a "logical equality" test. 3. If a superclass has already overridden equ…