Zhentiw - 博客园

2020年9月30日

[Javascript] Broadcaster + Operator + Listener pattern -- 4. Concat

摘要： import { compose } from "ramda"; let input = document.getElementById("input"); let inputBroadcaster = (listener) => { input.addEventListener("input", 阅读全文

posted @ 2020-09-30 18:32 Zhentiw 阅读(171) 评论(0) 推荐(0)

[Javascript] Broadcaster + Operator + Listener pattern -- 3 Stop with condition

摘要： import { compose } from "ramda"; let input = document.getElementById("input"); let inputBroadcaster = (listener) => { input.addEventListener("input", 阅读全文

posted @ 2020-09-30 18:12 Zhentiw 阅读(135) 评论(0) 推荐(0)

[Typescript] Typing “this” and “noImplicitThis”

摘要： See the following example: const elem = document.querySelector('.click'); function handleClick(event: Event) { event.preventDefault(); console.log(thi 阅读全文

posted @ 2020-09-30 01:17 Zhentiw 阅读(393) 评论(0) 推荐(0)

2020年9月29日

[Javascript] Broadcaster + Operator + Listener pattern -- 2 Unsubscribe from Broadcaster

摘要： Because Javascript has inconsistent way to cleanup the lisenters: removeEventListener(button, "click") clearnTimeout(id) We can implement a contract t 阅读全文

posted @ 2020-09-29 19:12 Zhentiw 阅读(146) 评论(0) 推荐(0)

[TypeScript] String Enums and Inlining Members

摘要： enum Sizes { Small = "small", Medium = "medium", Large = "large" } let selected: Sizes = Sizes.Samll; function updateSize(size: Sizes): void { selecte 阅读全文

posted @ 2020-09-29 15:24 Zhentiw 阅读(106) 评论(0) 推荐(0)

[Typescript] Enum: Numeric Enums and Reverse Mappings

摘要： Let's say we have enum defined as such: export enum WeekDayEnum { sunday = 0, monday, tuseday, wednesday, thursday, friday, saturday, } export type Da 阅读全文

posted @ 2020-09-29 15:13 Zhentiw 阅读(159) 评论(0) 推荐(0)

2020年9月27日

[Typescript] Simplify iteration of custom data structures in TypeScript with iterators (backwards iteration with for ... of.. loop)

摘要： Traversing items of custom data structures, like trees or linked lists, require knowledge of how that data structure is built. That can lead to proble 阅读全文

posted @ 2020-09-27 16:21 Zhentiw 阅读(198) 评论(0) 推荐(0)

[Machine Learning] Advice for Applying Machine Learning Week 6

摘要： This learning curve shows high error on the test sets but comparatively low error on training set, so the algorithm is suffering from high variance. T 阅读全文

posted @ 2020-09-27 03:30 Zhentiw 阅读(186) 评论(0) 推荐(0)

[Machine Learning] Machine Learning System Design Week 6

摘要： StatisticSolution Accuracy (85 + 10) / (1000) = .095 Precision (85) / (85 + 890) = 0.087 Recall There are 85 true positives and 15 false negatives, so 阅读全文

posted @ 2020-09-27 03:16 Zhentiw 阅读(257) 评论(0) 推荐(0)

[React] Choose the Right Hook for Your Recoil State

摘要： Recoil offers several hooks to use for consuming state in React, and this lesson looks at how to choose which hook to use, and what happens when you d 阅读全文

posted @ 2020-09-27 00:55 Zhentiw 阅读(181) 评论(0) 推荐(0)

Answer1215

公告