Zhentiw - 博客园

2019年1月22日

[Functional Programming] Pull Many Random Numbers in a Single State ADT Transaction

摘要： We have the ability to select a single random card from a pile of twelve cards, but we would like to pull a total of nine. Not only that, we would lik 阅读全文

posted @ 2019-01-22 21:38 Zhentiw 阅读(309) 评论(0) 推荐(0)

[TypeScript] Dynamically Allocate Function Types with Conditional Types in TypeScript

摘要： Conditional types take generics one step further and allow you to test for a specific condition, based on which the final type will be determined. We 阅读全文

posted @ 2019-01-22 21:01 Zhentiw 阅读(412) 评论(0) 推荐(0)

2019年1月21日

[TypeScript] Use the TypeScript "unknown" type to avoid runtime errors

摘要： The "any" type can be very useful, especially when adding types to an existing JavaScript codebase, but it can also lead to lots of runtime errors, as 阅读全文

posted @ 2019-01-21 21:17 Zhentiw 阅读(402) 评论(0) 推荐(0)

[Angular] Control the dependency lookup with @Host, @Self, @SkipSelf and @Optional

摘要： Very differently to AngularJS (v1.x), Angular now has a hierarchical dependency injector. That allows to specify service definitions as well as the se 阅读全文

posted @ 2019-01-21 16:53 Zhentiw 阅读(1085) 评论(0) 推荐(0)

[Flutter] Creating, Importing & Using Dynamic Widgets from Other Files in a Flutter Application

摘要： In this lesson we’ll learn how to import widgets we’ve created in other files & use them in our project. We'll also look at how to create dynamic prop 阅读全文

posted @ 2019-01-21 16:46 Zhentiw 阅读(949) 评论(0) 推荐(0)

[Angular] Tree shakable provider

摘要： When we create a Service, Angluar CLI will helps us to add: It only create a instance in root dependency tree. If there is no reference to use this pr 阅读全文

posted @ 2019-01-21 16:28 Zhentiw 阅读(248) 评论(0) 推荐(0)

[TypeScript] Custom data structures in TypeScript with iterators

摘要： We usually think of types as something that can define a single layer of an object: with an interface we normally specify a list of a few properties a 阅读全文

posted @ 2019-01-21 02:57 Zhentiw 阅读(416) 评论(0) 推荐(0)

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(447) 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(218) 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(254) 评论(0) 推荐(0)

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