Zhentiw - 博客园

2022年8月26日

摘要： Source: https://javascriptpatterns.vercel.app/patterns/design-patterns/prototype-pattern If you use factory pattern to create object: const createDog 阅读全文

posted @ 2022-08-26 18:09 Zhentiw 阅读(23) 评论(0) 推荐(0)

[Javascript] Factory pattern vs Class instance

摘要： In JavaScript, the factory pattern isn't much more than a function that returns an object without using the new keyword. ES6 arrow functions allow us 阅读全文

posted @ 2022-08-26 17:44 Zhentiw 阅读(32) 评论(0) 推荐(0)

[Javascript] Singleton Pattern

摘要： Source: https://javascriptpatterns.vercel.app/patterns/design-patterns/singleton-pattern With the Singleton Pattern, we restrict the instantiation of 阅读全文

posted @ 2022-08-26 15:44 Zhentiw 阅读(30) 评论(0) 推荐(0)

[Javascript] Module Pattern

摘要： Module pattern provide a way to have both public and private pieces with the export keyword. This protects values from leaking into the global scope o 阅读全文

posted @ 2022-08-26 15:18 Zhentiw 阅读(40) 评论(0) 推荐(0)

2022年8月24日

[Typescript] Only Type import or export

摘要： import type only imports declarations to be used for type annotations and declarations. It always gets fully erased, so there’s no remnant of it at ru 阅读全文

posted @ 2022-08-24 14:44 Zhentiw 阅读(102) 评论(0) 推荐(0)

[Typescript] Toolbox: isError

摘要： function isError(err: any): err is Error { return err instanceof Error; } try { somethingRisky() } catch(err: unknown) { if (isError(err)) { console.l 阅读全文

posted @ 2022-08-24 14:23 Zhentiw 阅读(27) 评论(0) 推荐(0)

[Typescript] ts-expect-error

摘要： In some ways // @ts-expect-error can act as a suppression comment, similar to // @ts-ignore. The difference is that // @ts-ignore will do nothing if t 阅读全文

posted @ 2022-08-24 01:46 Zhentiw 阅读(554) 评论(0) 推荐(0)

2022年8月23日

[Unit testing Express] Testing controller

摘要： CrudController: 查看代码 export const getOne = model => async (req, res) => { try { const doc = model .findOne({ createdBy: req.user._id, _id: req.params. 阅读全文

posted @ 2022-08-23 19:25 Zhentiw 阅读(33) 评论(0) 推荐(0)

[Express] Extends CrudController with Mongoose model

摘要： Each model controller: import { crudControllers } from '../../utils/crud' import { Item } from './item.model' export default crudControllers(Item) You 阅读全文

posted @ 2022-08-23 19:23 Zhentiw 阅读(27) 评论(0) 推荐(0)

[Unit Testing] Test Mongoose model

摘要： Model: import mongoose from 'mongoose' const itemSchema = new mongoose.Schema( { name: { type: String, required: true, trim: true, maxlength: 50 }, st 阅读全文

posted @ 2022-08-23 19:20 Zhentiw 阅读(20) 评论(0) 推荐(0)

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