Zhentiw - 博客园

2020年11月20日

[Tools] Lock a node and yarn version for a project

摘要： Using Volta: volta pin node yarn In add into package.json: "volta": { "node": "14.15.1", "yarn": "1.22.10" } 阅读全文

posted @ 2020-11-20 04:11 Zhentiw 阅读(92) 评论(0) 推荐(0)

[Tools] Npx createa gitignore file Node project

摘要： As simple as: npx gitignore node 阅读全文

posted @ 2020-11-20 04:03 Zhentiw 阅读(125) 评论(0) 推荐(0)

2020年11月19日

[React] Broadcaster + Operator + Listener pattern -- 20. useBroadcaster & useListener Example

摘要： To display a sequence of values in React, we can use our mapSequence operator, wrap it around a broadcaster, then pass that new broadcaster into our u 阅读全文

posted @ 2020-11-19 01:46 Zhentiw 阅读(120) 评论(0) 推荐(0)

2020年11月17日

[React] Broadcaster + Operator + Listener pattern -- 19. useBroadcaster & useListener

摘要： Instead of always combining useState and useEffect, when can create a utility useBroadcaster hook which allows us to pass in a broadcaster. export let 阅读全文

posted @ 2020-11-17 22:30 Zhentiw 阅读(134) 评论(0) 推荐(0)

[Javascript] Broadcaster + Operator + Listener pattern -- 18. Create a Win Condition with a mapDone Operator

摘要： Many streams of events end when a certain condition is met. When we run into that condition, we'll want to pass down our own custom values. This lesso 阅读全文

posted @ 2020-11-17 02:40 Zhentiw 阅读(189) 评论(0) 推荐(0)

2020年11月15日

[Typescript Unit testing] Error Handling with Unknown

摘要： function somethingRisky() {} try { somethingRisky() } catch(err: unknown) { if (err instanceof Error) { console.log(err.stack) } else { console.log(er 阅读全文

posted @ 2020-11-15 22:56 Zhentiw 阅读(92) 评论(0) 推荐(0)

[Typescript v3.9] ts-expect-error

摘要： Typescript v3.9 introduces the @ts-expect-error assertion added to TypeScript 3.9. This assertion is more descriptive than @ts-ignore because, rather 阅读全文

posted @ 2020-11-15 22:45 Zhentiw 阅读(1076) 评论(0) 推荐(0)

[Typescript v4.1] Template type literals

摘要： type Corner = `${'top' | 'bottom'}-${ 'left' | 'right'}` type VerticalAlignment = "top" | "middle" | "bottom"; type HorizontalAlignment = "left" | "ce 阅读全文

posted @ 2020-11-15 22:25 Zhentiw 阅读(177) 评论(0) 推荐(0)

[Typescript v4] Tuple Types && Recursive types

摘要： ...T: type Foo<T extends any[]> = [boolean, ...T, boolean] In previous typescript version, you can only put '...T' to the last element of array. Put n 阅读全文

posted @ 2020-11-15 22:19 Zhentiw 阅读(129) 评论(0) 推荐(0)

2020年11月14日

[Typescript] Nullish Coalescing

摘要： class Foo { #name; constructor(rawName?: string) { this.#name = rawName ?? (no name) } log() { console.log(this.#name) } } Checking 'rawName' is nulli 阅读全文

posted @ 2020-11-14 18:11 Zhentiw 阅读(112) 评论(0) 推荐(0)

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