Zhentiw - 博客园

2019年9月4日

摘要： We will learn how to work with Lists using a variety of methods made available in the dart:core library. We will explore the top methods for working w 阅读全文

posted @ 2019-09-04 15:26 Zhentiw 阅读(222) 评论(0) 推荐(0)

[Dart] splitMapJoin

摘要： var str3 = '''Multi Line String'''; print( str3.splitMapJoin( RegExp(r'^', multiLine: true), // Matches the beginning of the line onMatch: (m) => '** ${m.group(0)}', // Adds asterisk to match onNonMat 阅读全文

posted @ 2019-09-04 15:18 Zhentiw 阅读(915) 评论(0) 推荐(0)

2019年9月3日

[Dart] Capture and Handle Data Sequences with Streams in Dart

摘要： Streams represent a sequence of asynchronous events. Each event is either a data event, also called an element of the stream, or an error event, which 阅读全文

posted @ 2019-09-03 17:21 Zhentiw 阅读(228) 评论(0) 推荐(0)

[Javascript] Run asynchronous functions in sequence using reduce

摘要： This can be handy if you have a rate limit on API requests or if you need to pass the result of each promise to the next one. function fetchMessages(u 阅读全文

posted @ 2019-09-03 13:06 Zhentiw 阅读(121) 评论(0) 推荐(0)

2019年9月2日

[Functional Programming] Rewrite a reducer with functional state ADT

摘要： For example we have a feature reducer like this: First of all, we can replace 'swtich' statement with normal Object: In case of ´actionReducer[type]´ 阅读全文

posted @ 2019-09-02 16:27 Zhentiw 阅读(197) 评论(0) 推荐(0)

[Angular] Using Pipe for function memoization

摘要： Sometimes we might have some expensive function to calcuate state directly from template: The ´calculate´ function is a pure function, we can use memo 阅读全文

posted @ 2019-09-02 15:40 Zhentiw 阅读(257) 评论(0) 推荐(0)

2019年8月29日

[React + GraphQL] Use useLazyQuery to manually execute a query with Apollo React Hooks

摘要： When using useQuery from Apollo React Hooks, the request will be sent automatically after the component has been mounted. This might not be the desire 阅读全文

posted @ 2019-08-29 19:25 Zhentiw 阅读(1522) 评论(0) 推荐(0)

[CSS] Conditionally Assign Style to a Parent Element with Focus-Within Pseudo-class

摘要： Use the focus-within pseudo-class to conditionally assign styling to a parent element when its child receives focus. HTML: CSS: 阅读全文

posted @ 2019-08-29 17:15 Zhentiw 阅读(133) 评论(0) 推荐(0)

[Angular 8] Calculate and Measure Performance budgets with the Angular CLI

摘要： Measuring is extremely important, without numbers we don’t know about potential problems and we don’t have a base we can improve upon. Performance Bud 阅读全文

posted @ 2019-08-29 17:12 Zhentiw 阅读(236) 评论(0) 推荐(0)

[Angular 8] Custom Route Preloading with ngx-quicklink and Angular

摘要： In a previous lesson we learned about implementing a custom preloading strategy. That gives you a lot of control over which route to preload and which 阅读全文

posted @ 2019-08-29 17:09 Zhentiw 阅读(338) 评论(0) 推荐(0)

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