April 2020
Intermediate to advanced
177 pages
1h 45m
Chinese
Content preview from 精通模块化JavaScript
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56
｜
第
3
章
模块设计
从字面上来看，“
Move Deliberately and Experiment
（谨慎地行动和尝试）”
这个口号可能更好。它和
Facebook
那个口号的观点是相同的，它的真正
含义并不意味着要揭示或解释什么。进行尝试是软件设计和开发的一个关
键方面。我们应该不断尝试和验证新的想法，验证它们是否比现有解决方
案更好。可以把“快速行动，打破常规”理解为尽早做以及经常做
A/B
测
试
1
，“谨慎地行动和尝试”就很好地传达了这个意思。
“谨慎地行动”是指所做的一切都是有道理可循的。工程进度很少会受到开
发团队加快进度意愿的影响，但是通常要受制于产品版本发布周期，不得
不满足这些版本发布所需的复杂需求。当然，每个人都希望工程进度尽可
能快，但是接口的设计不应该太仓促，不管我们处理的这个接口是体系结构、
层、组件还是函数。内部结构对于正确处理需求并不重要，因为只要接口
保持不变，内部结构就可以在稍后进行改进，以提升性能或可读性。我不
是提倡草率开发内部结构，而是鼓励经过充分的思考周全地设计接口。
3.2
CRUST
原则
我们的讨论越来越接近函数内部结构了，不过这部分内容将在第
4
章详细
讨论。在此之前，我们需要解决组件级别上的一些问题。本节探讨如何遵
循第
2
章所述的
CRUST
原则来保持组件的简单性。
3.2.1
适度使用
DRY
原则
DRY
（
Don
’
t Repeat Yourself
，即避免重复的代码和逻辑）是软件开发中最
1
A/B
测试，用户测试的一种形式，即让一小部分用户使用与大部分用户不同的产品版本，然 ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.