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摘要: From T, pick a set of properties whose type are not assignable to U. For Example type OmitBoolean = OmitByType<{ name: string count: number isReadonly 阅读全文
posted @ 2022-10-20 18:44 Zhentiw 阅读(27) 评论(0) 推荐(0)
摘要: Implement the type version of binary tree inorder traversal. For example: const tree1 = { val: 1, left: null, right: { val: 2, left: { val: 3, left: n 阅读全文
posted @ 2022-10-20 18:41 Zhentiw 阅读(29) 评论(0) 推荐(0)
摘要: The Block, Element, Modifier methodology (BEM) is a popular naming convention for classes in CSS. For example, the block component would be represente 阅读全文
posted @ 2022-10-20 18:29 Zhentiw 阅读(24) 评论(0) 推荐(0)
摘要: catchError will complete the observable, so be careful where you put the catchError: import { fromEvent, empty } from 'rxjs'; import { ajax } from 'rx 阅读全文
posted @ 2022-10-20 14:43 Zhentiw 阅读(131) 评论(0) 推荐(0)
摘要: If you're thinking about putting a TypeScript package up to NPM, you should be considering preconstruct. It makes setup EXTREMELY easy and takes many 阅读全文
posted @ 2022-10-20 14:31 Zhentiw 阅读(24) 评论(0) 推荐(0)
摘要: You can DRY up your generics code MASSIVELY (and improve perf) by assigning local variables to default generic slots. Here, we move some complex 'Extr 阅读全文
posted @ 2022-10-20 14:21 Zhentiw 阅读(24) 评论(0) 推荐(0)
摘要: You can use generics to dynamically specify the number, and type, of arguments to functions. Here, we create a sendEvent function which only asks for 阅读全文
posted @ 2022-10-20 03:09 Zhentiw 阅读(42) 评论(0) 推荐(0)
摘要: Maps values to a new observable on emission from source, subscribing to and emitting results of inner observables By default mergeMap does not limit t 阅读全文
posted @ 2022-10-19 15:13 Zhentiw 阅读(155) 评论(0) 推荐(0)
摘要: Recursively flatten array up to depth times. For example: type a = FlattenDepth<[1, 2, [3, 4], [[[5]]]], 2> // [1, 2, 3, 4, [5]]. flattern 2 times typ 阅读全文
posted @ 2022-10-19 14:54 Zhentiw 阅读(28) 评论(0) 推荐(0)
摘要: const input$ = fromEvent(textInput, 'keyup'); input$.pipe( map(event => { const term = event.target.value; return ajax.getJSON(`https://api.github.com 阅读全文
posted @ 2022-10-18 21:17 Zhentiw 阅读(44) 评论(0) 推荐(0)
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