Zhentiw - 博客园

2018年9月27日

[RxJS] Implement RxJS `mergeMap` through inner Observables to Subscribe and Pass Values Through

摘要： Understanding sources and subscribers makes it much easier to understand what's going on with mergeMap under the hood. Where a typical operator invoke 阅读全文

posted @ 2018-09-27 19:18 Zhentiw 阅读(315) 评论(0) 推荐(0)

[RxJS] Chain RxJS Operators Together with a Custom `pipe` Function using Array.reduce

摘要： Instead of writing complex operators, it's usually best to write simple, single-purpose operators then chain them together when necessary. The pipefun 阅读全文

posted @ 2018-09-27 18:05 Zhentiw 阅读(237) 评论(0) 推荐(0)

[RxJS] Implement the `map` Operator from Scratch in RxJS

摘要： While it's great to use the RxJS built-in operators, it's also important to realize you now have the knowledge to write them by yourself if needed. Th 阅读全文

posted @ 2018-09-27 17:53 Zhentiw 阅读(195) 评论(0) 推荐(0)

2018年9月26日

[RxJS] Create a Reusable Operator from Scratch in RxJS

摘要： With knowledge of extending Subscriber and using source.lift to connect a source to a subscriber, you can now create your own operators by writing fun 阅读全文

posted @ 2018-09-26 01:51 Zhentiw 阅读(198) 评论(0) 推荐(0)

[RxJS] Use `lift` to Connect a `source` to a `subscriber` in RxJS

摘要： The lift method on each source hides away the internals of RxJS so you can simply connect a source to the subscriber you're working with. The lift met 阅读全文

posted @ 2018-09-26 01:42 Zhentiw 阅读(327) 评论(0) 推荐(0)

2018年9月24日

[Analytics] Add Tealium debugger in Chrome

摘要： It would be helpful once you can see what information have been tracking inside you web application, We can use Teailumn debugger for that, inside Chr 阅读全文

posted @ 2018-09-24 19:08 Zhentiw 阅读(393) 评论(0) 推荐(0)

2018年9月21日

[TypeScript] Transform Existing Types Using Mapped Types in TypeScript

摘要： Mapped types are a powerful and unique feature of TypeScript's type system. They allow you to create a new type by transforming all properties of an e 阅读全文

posted @ 2018-09-21 15:44 Zhentiw 阅读(342) 评论(0) 推荐(0)

2018年9月20日

[TypeScript] Query Properties with keyof and Lookup Types in TypeScript

摘要： The keyof operator produces a union type of all known, public property names of a given type. You can use it together with lookup types (aka indexed a 阅读全文

posted @ 2018-09-20 22:33 Zhentiw 阅读(377) 评论(0) 推荐(0)

2018年9月19日

[Typescript] Specify Exact Values with TypeScript’s Literal Types

摘要： A literal type is a type that represents exactly one value, e.g. one specific string or number. You can combine literal types with union types to mode 阅读全文

posted @ 2018-09-19 18:11 Zhentiw 阅读(206) 评论(0) 推荐(0)

[Unit Testing] Unit Test a Function that Invokes a Callback with a Sinon Spy

摘要： Unit testing functions that invoke callbacks can require a lot of setup code. Using sinon.spy to create a fake callback function can simplify your uni 阅读全文

posted @ 2018-09-19 02:54 Zhentiw 阅读(180) 评论(0) 推荐(0)

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