Zhentiw - 博客园

2020年1月18日

[XState] Replace Enumerated States with a State Machine

摘要： numerating the possible states of a function is a sound way to write a function, but it is imperative and could benefit from abstraction. We can do th 阅读全文

posted @ 2020-01-18 17:35 Zhentiw 阅读(163) 评论(0) 推荐(0)

[Javascript] Eliminate Boolean Explosion by Enumerating States

摘要： There are several fundamental problems with trying to manage the state of a function through the use of booleans. The first is often referred to as "b 阅读全文

posted @ 2020-01-18 17:11 Zhentiw 阅读(369) 评论(0) 推荐(0)

2020年1月17日

[NGXS] Async Action "Fire and Forgot" && "Fire and Wait"

摘要： Fire and Forgot: Fire an action and not wait it complete. Fire and Wait: FIre an action and wait for result. Fire and Forgot Fire and Wait: Using `mer 阅读全文

posted @ 2020-01-17 15:55 Zhentiw 阅读(419) 评论(0) 推荐(0)

2020年1月16日

[NGXS] Select - 3. @Selector orders matter

摘要： Problem: Two ways to solve the problem: 1. Change the order: 2. Using createSelector: 阅读全文

posted @ 2020-01-16 18:37 Zhentiw 阅读(171) 评论(0) 推荐(0)

[NGXS] Selector - 2 Joining Selectors, compose

摘要： When defining a selector, you can also pass other selectors into the signature of the Selector decorator to join other selectors with this state selec 阅读全文

posted @ 2020-01-16 18:31 Zhentiw 阅读(261) 评论(0) 推荐(0)

[NGXS] Select - 1

摘要： 1. Selet piece of state from Store: This is useful when you just want to get state from the store directly. Of course that global state should contain 阅读全文

posted @ 2020-01-16 18:25 Zhentiw 阅读(348) 评论(0) 推荐(0)

[NGXS] Using Immer with NGXS

摘要： This approach can also allow for the creation of well named helper functions that can be shared between handlers that require the same type of update. 阅读全文

posted @ 2020-01-16 17:07 Zhentiw 阅读(200) 评论(0) 推荐(0)

[Typescript] Namespaces

摘要： In general, it is not recommeded to use Namespace in Typescript, we should use ES6 module export import syntax. But there are still some good usecases 阅读全文

posted @ 2020-01-16 16:58 Zhentiw 阅读(160) 评论(0) 推荐(0)

[Algorithm] 14. Longest Common Prefix -- 4

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posted @ 2020-01-16 02:58 Zhentiw 阅读(2) 评论(0) 推荐(0)

2020年1月15日

[NestJS] Fallback Exception Filter

摘要： Fallback exception filter is mean to catch any exception which are not catched by other exception filters; main.ts: Order matters, from most generic t 阅读全文

posted @ 2020-01-15 14:29 Zhentiw 阅读(310) 评论(0) 推荐(0)

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