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马瑞胜 maruisheng

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@maruisheng
maruisheng / 60.原型的作用域
Last active February 18, 2019 00:42
简单说下原型的作用域
```language
所谓的作用域 也被称为生命周期
我们在使用数据时，会向计算机申请一块内存空间来保存数据。这块空间被称为 变量，数组，对象等
计算机为了保证自身的运行速度，会在某个时间，将分配出去的内存收回。
一个内存空间 从创建 到被收回 ， 这个过程被称为它的作用域或者生命周期
只有在这个内存空间还活着的时候，才可以操作里面的数据
全局变量： 是指一个变量的生命周期是全局的，也就是当前文件内都可以获取到
var a = 10; a 就是一个全局变量
局部变量： 是指一个变量的生命周期，只能在当前文件中的部分范围访问，离开范围，即范围不到
function myFun(){
@maruisheng
maruisheng / 59.原型
Created February 17, 2019 13:42
简单说下
下面这是原型的使用：
![内网通截图20190217214137.png](data:image/png;base64,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
@maruisheng
maruisheng / 58.继承（八）
Created February 17, 2019 13:40
拷贝继承
![内网通截图20190217213943.png](data:image/png;base64,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
@maruisheng
maruisheng / 57.继承（七）
Created February 17, 2019 13:38
组合继承
![内网通截图20190217213806.png](data:image/png;base64,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
@maruisheng
maruisheng / 56.继承（六）
Created February 17, 2019 13:37
原型式继承
![内网通截图20190217213709.png](data:image/png;base64,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
@maruisheng
maruisheng / 55.继承（五）
Created February 17, 2019 13:36
实例继承
![内网通截图20190217213557.png](data:image/png;base64,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
@maruisheng
maruisheng / 54.继承（四）
Created February 17, 2019 13:35
原型链继承
![内网通截图20190217213436.png](data:image/png;base64,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
@maruisheng
maruisheng / 53.继承（三）
Created February 17, 2019 13:33
类式继承
![内网通截图20190217213329.png](data:image/png;base64,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
@maruisheng
maruisheng / 52.继承（二）
Created February 17, 2019 13:32
寄生组合式继承
![内网通截图20190217213212.png](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAABP0AAAIWCAYAAAAs8PgWAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAFD7SURBVHhe7d1PjxxHnh/8AZ5L774GH/cljAUaIF+BLr7NiYZ8IgjoPNA8J2GWcxEG4BADYg97WEC0SQL0wSAN0cLsAqSthQhBjzQLg+YaDVHgYf54rRFgzGnmkk9lZkV1VFREZlR3dbE76nP4oDIjfhmV1d2a6f7yl5k/6P78+24Xvvr//lt2HAAAAADYr52FfgAAAADAxaDTDwAAAAAao9MPAAAAABqj0++ief2su/v8ZX7uHH3z/FH38OvX2TkAAAAALpcD6vR73X35eC7Yqqk5R33gd++T7svvMnPn7bsvuof3HnWfvs7MAQAAAHCpHE6n3xCoPeu+yc0FhZq79x6t7c+Nx2pqRi+7Txe1U4Fj/Vrrqo+r+RoBAAAAcOEdTKdfzeWrpZqp0Cw3F4+VtlP9e999/EX3fWYuSNdKTdXmtjeNnY5v4/JiAAAAAHbnMDr9hktXZy6bLdRMh2SjXE0YS1/zxi6/0qW1/bGxeDy3nY6lr5N0+wEAAABcegfR6ff915/Mdq/laubCslyoVitepzZoS4+L98N2WL9GOHbddAAJAAAAwMV3AJ1+NSHWfE0akpVDs1GYT19zhsBx5tLeXrxGup1bP4ylr9Pe8sNMAAAAADiz9jv9zvAAj1gamE0FaPFcaTs2Ffr1x+Skdam4prSdJ/QDAAAAuOwa7/SrCbDqQ64QmE0FZ3OhWm7+tJ1+qVxdzvS80A8AAADgsmu70+8MD/AomQvUUlX1M52GYY14rXTdqfepOocV9/QDAAAAuOya7vT75vmj2Qd41NQEufAt1o/XWj92/um94bW0RqlmSnz8iqf3AgAAAFx6DXf67eYBHkEakhVDs0ioqakdws
@maruisheng
maruisheng / 51.继承（一）
Created February 17, 2019 13:31
寄生式继承
![内网通截图20190217213031.png](data:image/png;base64,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