Zhentiw - 博客园

2020年2月20日

[Javascript] Wait for Multiple JavaScript Promises to Settle with Promise.allSettled()

摘要： The Promise.allSettled() method accepts an array (or any other iterable) of promises as a parameter. It returns a Promise object that is fulfilled wit 阅读全文

posted @ 2020-02-20 18:27 Zhentiw 阅读(456) 评论(0) 推荐(0)

[Unit Testing Angular] fakeAsync

摘要： In this post, we are going to see how to use 'fakeAsync' to test async code in Angular Context. fakeAsync using Zoom.js underhook, it detects all the 阅读全文

posted @ 2020-02-20 17:59 Zhentiw 阅读(294) 评论(0) 推荐(0)

[Javascript] Introduction to Microtasks

摘要： In Javascript, there are two types of event loops for async tasks. First one, is well known one, for example, setTimeout, http request, click event wi 阅读全文

posted @ 2020-02-20 17:04 Zhentiw 阅读(132) 评论(0) 推荐(0)

[Algorithm] 474. Ones and Zeroes

摘要： In the computer world, use restricted resource you have to generate maximum benefit is what we always want to pursue. For now, suppose you are a domin 阅读全文

posted @ 2020-02-20 05:15 Zhentiw 阅读(211) 评论(0) 推荐(0)

2020年2月19日

【逻辑思维】排中律：生存还是毁灭，只能选一个

摘要： l逻辑三大定律之三：排中律：两个自相矛盾的观点，一定又一个是对的，没有“都不对”这种中间状态。在这种情况下，一个人可以不表态，但是如果表态，就不能说“两个我都不同意” 比如：我认为降价不对，这会造成品牌价值受损。但是不降价也不对，毕竟眼前的销售压力很大。。。什么是自相矛盾的观点？就是“降价阅读全文

posted @ 2020-02-19 23:48 Zhentiw 阅读(1971) 评论(0) 推荐(0)

【逻辑思维】矛盾律：谁给理发师理发

摘要：逻辑三大定律之二，矛盾律两个相互否定的思想，不可能都对比如今年过节不收礼，收礼只收XXX。就是通过制造矛盾，抓住大家的注意力。理解什么是“否定” 比如成功的否定，是什么？是失败马？不是是“未成功”。未成功的结果不一定就是失败，还可能是成功。未成功的外延大于失败。培养识别三种“自相阅读全文

posted @ 2020-02-19 23:06 Zhentiw 阅读(1420) 评论(0) 推荐(0)

[AST Babel] Create a simple babel plugin

摘要： For example, we have the source code: getVersison('3.4.5') function getVersion(versionString) { const versionRegex = /(\d)\.(\d)\.(\d+)/ const [, majo 阅读全文

posted @ 2020-02-19 20:27 Zhentiw 阅读(176) 评论(0) 推荐(0)

[Angular 8 Unit testing] Testing a smart component with service injection -- 1

摘要： The smart component we want to test: import {Component, OnInit} from '@angular/core'; import {Course} from "../model/course"; import {Observable} from 阅读全文

posted @ 2020-02-19 17:17 Zhentiw 阅读(972) 评论(0) 推荐(0)

2020年2月18日

[Javascript] Primitive value are immutable

摘要： Primitive Values Undefined (undefined), used for unintentionally missing values. Null (null), used for intentionally missing values. Booleans (true an 阅读全文

posted @ 2020-02-18 17:24 Zhentiw 阅读(227) 评论(0) 推荐(0)

[ML] 2. Introduction to neural networks

摘要： Training an algorithm involes four ingredients: Data Model Objective function: We put data input a Model and get output out of it. The value we call i 阅读全文

posted @ 2020-02-18 02:55 Zhentiw 阅读(132) 评论(0) 推荐(0)

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