更新知识图谱
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27. 更多知识/更多知识.md
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27. 更多知识/更多知识.md
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# 更多知识
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该部分知识的特点：
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- 面试有较低的机率被问到
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- 实际编码中用得不是太多
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**1. 符号**
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作用：消除魔法字符、避免一个复杂对象中含有多个属性的时候某个属性名覆盖掉、模拟类的私有方法
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所在章节：ES6 详细版（袁进）
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<img src="https://xiejie-typora.oss-cn-chengdu.aliyuncs.com/2022-02-14-073533.png" alt="image-20220214153533405" style="zoom:50%;" />
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**2. 迭代器和生成器**
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作用：实现异步的一种方式，React 中大量使用到了生成器，Koa第一代也是大量用到了生成器。
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所在章节：ES6 详细版（袁进）
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<img src="https://xiejie-typora.oss-cn-chengdu.aliyuncs.com/2022-02-14-073151.png" alt="image-20220214153151334" style="zoom:50%;" />
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**3. 代理与反射**
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作用：属于元编程的知识，写框架的时候会用到
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所在章节：ES6 详细版（袁进）
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<img src="https://xiejie-typora.oss-cn-chengdu.aliyuncs.com/2022-02-14-073241.png" alt="image-20220214153240704" style="zoom:50%;" />
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**4. 增强的数组功能**
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作用：JavaScript 类型化数组是一种类似数组的对象，并提供了一种用于访问原始二进制数据的机制。JavaScript引擎会做一些内部优化，以便对数组的操作可以很快。
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所在章节：ES6 详细版（袁进）
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<img src="https://xiejie-typora.oss-cn-chengdu.aliyuncs.com/2022-02-14-073319.png" alt="image-20220214153318805" style="zoom:50%;" />
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16
知识图谱.dio
16
知识图谱.dio
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