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按目录整理
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ascoders committed Apr 16, 2021
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- 笔者在大厂的项目实战经验。
- 编译原理、设计模式两大基础模块。
- 逐渐加入一些后端技术解读。
- 偶尔更新一些商业思考。

- 偶尔更新一些软知识比如商业思考。

## 关注前端精读微信公众号

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# 增强现实与可视化

## 引言

增强现实,Augmented Reality,简称 AR。在 VR 的热潮已经褪去,AI 当下正红的技术圈里,AR 似乎已经成为了过气网红。但似乎在现在,我们可以来冷静地看待一下增强现实这个概念。

做前端的最终还是要和用户打交道的,增强现实是不是为用户界面带来了新的可能?可视化作为前端的一个细分领域,这篇文章正是从这个角度出发来重新认识增强现实与可视化。
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解析 SQL 可以分为如下四步:

1. 词法分析,将 SQL 字符串拆分成包含关键词识别的字符段(Tokens)。
2. 语法分析,利用自顶向下或自底向上的算法,将 Tokens 解析为 AST,可以手动,也可以自动。
3. 错误检测、恢复、提示推断,都需要利用语法分析产生的 AST。
4. 语义分析,做完这一步就可以执行 SQL 语句了,不过对前端而言,不需要深入到这一步,可以跳过。
1. 词法分析,将 SQL 字符串拆分成包含关键词识别的字符段(Tokens)。
2. 语法分析,利用自顶向下或自底向上的算法,将 Tokens 解析为 AST,可以手动,也可以自动。
3. 错误检测、恢复、提示推断,都需要利用语法分析产生的 AST。
4. 语义分析,做完这一步就可以执行 SQL 语句了,不过对前端而言,不需要深入到这一步,可以跳过。

## 2 精读

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