Zhentiw - 博客园

2019年1月18日

[Javascript] Deep merge in Javascript with Ramda.js mergeDeepWith

摘要： Javascript's Object.assign is shadow merge, loadsh's _.merge is deep merge, but has probem for array. We can use Ramda.js to easy solve the problem: T 阅读全文

posted @ 2019-01-18 21:04 Zhentiw 阅读(426) 评论(0) 推荐(0)

[TypeScript] Export public types from your library

摘要： If you're a library author, it's useful to expose your public types as interfaces, to allow your consumers to extend them if needed. For example: To r 阅读全文

posted @ 2019-01-18 19:18 Zhentiw 阅读(202) 评论(0) 推荐(0)

[Functional Programming] Randomly Pull an Item from an Array with the State ADT (Pair)

摘要： Functor composition is a powerful concept that arises when we have one Functor nested in another Functor. It becomes even more powerful when both of t 阅读全文

posted @ 2019-01-18 17:52 Zhentiw 阅读(234) 评论(0) 推荐(0)

2019年1月17日

[Functional Programming] Draw Items from One JavaScript Array to Another using a Pair ADT

摘要： We want to be able to pick nine random cards from an array of twelve cards, but can run into problems of keeping both the cards already draw and the c 阅读全文

posted @ 2019-01-17 21:47 Zhentiw 阅读(197) 评论(0) 推荐(0)

[TypeScript] Create Explicit and Readable Type Declarations with TypeScript mapped Type Modifiers

摘要： Using the optional “+” sign together with mapped type modifiers, we can create more explicit and readable type declarations. We can also use the “-” ( 阅读全文

posted @ 2019-01-17 19:46 Zhentiw 阅读(311) 评论(0) 推荐(0)

2019年1月16日

[Spring Boot] Adding JPA and Spring Data JPA

摘要： JPA is just like a helper class for providing data for Controller, has method like 'findOne', 'findAll', 'saveAndFlush', 'delete'. in repository/Shipw 阅读全文

posted @ 2019-01-16 20:53 Zhentiw 阅读(427) 评论(0) 推荐(0)

[Javascript] Multiply Two Arrays over a Function in JavaScript

摘要： Just like the State ADT an Array is also an Applicative Functor. That means we can do the same tricks with liftA2 with Array that we have been doing w 阅读全文

posted @ 2019-01-16 16:30 Zhentiw 阅读(720) 评论(0) 推荐(0)

[HTML5] Render Hello World Text with Custom Elements

摘要： Custom elements are fun technology. In this video, you will learn how to set one up and running in less than 2 minutes. You'll learn how to create a C 阅读全文

posted @ 2019-01-16 15:54 Zhentiw 阅读(181) 评论(0) 推荐(0)

[Javascript] Conditionally spread entries to a JavaScript object

摘要： In JavaScript, we often end up composing one object out of several other objects. Luckily there's a convenient spread operator which allows us to spre 阅读全文

posted @ 2019-01-16 15:45 Zhentiw 阅读(160) 评论(0) 推荐(0)

2019年1月15日

[TypeScript] Use the JavaScript “in” operator for automatic type inference in TypeScript

摘要： Sometimes we might want to make a function more generic by having it accept a union of different types as an argument. Using the JavaScript “in” opera 阅读全文

posted @ 2019-01-15 20:47 Zhentiw 阅读(204) 评论(0) 推荐(0)

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