Zhentiw - 博客园

2020年1月19日

[XState] Send Events to the Machine with the XState Send Action Creator

摘要： XState provides the send function to create an action that will send the event passed in to the machine. If we provide the second argument to the send 阅读全文

posted @ 2020-01-19 20:21 Zhentiw 阅读(335) 评论(0) 推荐(0)

[XState] Use Internal Transitions in XState to Avoid State Exit and Re-Entry

摘要： Transitions come in two varieties: "external" and "internal". By default, a transition is considered external. This means that a transition will exit 阅读全文

posted @ 2020-01-19 20:11 Zhentiw 阅读(288) 评论(0) 推荐(0)

[TypeScript] Decorator-based Validation using Class Validator

摘要： For example, we have a interface: We are using it with NestJS backend, in order to validate the request with meanful runtime error message, we can use 阅读全文

posted @ 2020-01-19 17:45 Zhentiw 阅读(291) 评论(0) 推荐(0)

[Algorithm] 70. Climbing Stairs

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posted @ 2020-01-19 04:27 Zhentiw 阅读(3) 评论(0) 推荐(0)

[XState] Trigger Actions When Entering and Exiting a XState State

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posted @ 2020-01-19 03:04 Zhentiw 阅读(4) 评论(0) 推荐(0)

[XState] Add Actions to Transitions to Fire Side Effects

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posted @ 2020-01-19 02:53 Zhentiw 阅读(9) 评论(0) 推荐(0)

2020年1月18日

[XState] Use an Interpreter to Instantiate a Machine

摘要： While it's powerful enough to have Machine.transition, it can get tedious constantly passing it a state and an event. It would be nice if we had a fun 阅读全文

posted @ 2020-01-18 22:45 Zhentiw 阅读(172) 评论(0) 推荐(0)

[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(192) 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(388) 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(443) 评论(0) 推荐(0)

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