Zhentiw - 博客园

2017年3月6日

摘要： Learn how to create a table using the most widely-used data types (serial, varchar, integer, float, boolean, and date), and the most necessary constra 阅读全文

posted @ 2017-03-06 17:48 Zhentiw 阅读(157) 评论(0) 推荐(0)

[Typescript 2] Nullable Types - Avoiding null and undefined Bugs

摘要： For example you have a TS app: The problem for this piece of code is that, you can assign 'kobe' to null, or undefined. And compiler won't catch this 阅读全文

posted @ 2017-03-06 17:16 Zhentiw 阅读(258) 评论(0) 推荐(0)

[Ramda] Sort, SortBy, SortWith in Ramda

摘要： The difference between sort, sortBy, sortWith is that: 1. sort: take function as args. 2. sortBy: take prop as args. 3. sortWith: take array of funcs 阅读全文

posted @ 2017-03-06 16:51 Zhentiw 阅读(755) 评论(0) 推荐(0)

[Django] Creating an app, models and database

摘要： To add a new app, first cd to the project. Then run: After that a new folder call 'scrumboard' will be created in you applicaiton folder. Now cd to sc 阅读全文

posted @ 2017-03-06 02:36 Zhentiw 阅读(224) 评论(0) 推荐(0)

2017年3月3日

[Ramda] R.project -- Select a Subset of Properties from a Collection of Objects in Ramda

摘要： In this lesson we'll take an array of objects and map it to a new array where each object is a subset of the original. We'll look at multiple ways to 阅读全文

posted @ 2017-03-03 18:46 Zhentiw 阅读(314) 评论(0) 推荐(0)

[Ramda] Refactor a Promise Chain to Function Composition using Ramda

摘要： Promise chains can be a powerful way to handle a series of transformations to the results of an async call. In some cases, additional promises are req 阅读全文

posted @ 2017-03-03 17:08 Zhentiw 阅读(423) 评论(0) 推荐(0)

2017年3月2日

[SVG] Combine Multiple SVGs into an SVG Sprite

摘要： In this lesson, we’ll explore the process of combining all of your SVG icons into one SVG sprite, to be included directly into markup. We’ll use the c 阅读全文

posted @ 2017-03-02 21:59 Zhentiw 阅读(259) 评论(0) 推荐(0)

[Ramda] Difference between R.converge and R.useWith

摘要： So what is Point-free function. Take a look this example: To make it as point-free function, we need to get rid of person object we pass into the func 阅读全文

posted @ 2017-03-02 19:34 Zhentiw 阅读(317) 评论(0) 推荐(0)

[Ramda] Refactor to a Point Free Function with Ramda's useWith Function

摘要： Naming things is hard and arguments in generic utility functions are no exception. Making functions "tacit" or "point free" removes the need for the e 阅读全文

posted @ 2017-03-02 19:15 Zhentiw 阅读(235) 评论(0) 推荐(0)

[Angular] Dynamic component's instance and sorting

摘要： After create a component dynamic, we are able to change the component's props and listen to its event. If we log out 'this.component.instance', we can 阅读全文

posted @ 2017-03-02 04:26 Zhentiw 阅读(413) 评论(0) 推荐(0)

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