Zhentiw - 博客园

2020年6月2日

[Functional Programming] Alternative operator for Either

摘要： Thinking about Promise.all, once there is a Promise in the list fails, the whole promise fails. There would be good to have an 'Alernative' operator, 阅读全文

posted @ 2020-06-02 15:13 Zhentiw 阅读(187) 评论(0) 推荐(0)

[React] Use Environment Variables with Create React App

摘要： Environment variables are a standard way to configure variables in your app based on the current environment (development, test, production). This les 阅读全文

posted @ 2020-06-02 01:05 Zhentiw 阅读(191) 评论(0) 推荐(0)

2020年5月30日

[Python] Simple Decorators

摘要： def my_decorator(func): def wrapper(): print("Something is happening before the function is called.") func() print("Something is happening after the f 阅读全文

posted @ 2020-05-30 19:25 Zhentiw 阅读(123) 评论(0) 推荐(0)

[Python] Template literals f""

摘要： The same as Javascript: // Javascript function sayHello(name) { return `Hello ${name}` } //python def say_hello(name): return f"Hello {name}" 阅读全文

posted @ 2020-05-30 19:23 Zhentiw 阅读(123) 评论(0) 推荐(0)

[Python] Inheritance

摘要： class Clothing: def __init__(self, color, size, style, price): self.color = color self.size = size self.style = style self.price = price def change_pr 阅读全文

posted @ 2020-05-30 00:53 Zhentiw 阅读(172) 评论(0) 推荐(0)

2020年5月28日

[Node.js] Mock an API for Local Development in React with Mirage JS

摘要： Mirage JS lets you mock out production APIs directly alongside your frontend React code. You can tweak the data or force a network request to hang, so 阅读全文

posted @ 2020-05-28 14:55 Zhentiw 阅读(252) 评论(0) 推荐(0)

[Functional Programming] foldMap for Monoids

摘要： Let's say we have following semigroups: // Total: Sum up all the number const Total = (x) => ({ x, concat(o) { return Total(o.x + x); }, fold() { retu 阅读全文

posted @ 2020-05-28 14:42 Zhentiw 阅读(161) 评论(0) 推荐(0)

[Tools] Install and Manage Node.js Versions with nvm

摘要： It can be difficult to work on multiple projects that use different versions of Node. nvm (Node Version Manger) make this easier by allowing you to do 阅读全文

posted @ 2020-05-28 01:57 Zhentiw 阅读(170) 评论(0) 推荐(0)

[Python] Magic methods

摘要： Thinking how to add tow Guessin object together? It is similar idea to Functional programming, Data type. import math import matplotlib.pyplot as plt 阅读全文

posted @ 2020-05-28 01:48 Zhentiw 阅读(303) 评论(0) 推荐(0)

[Python] Gaussian Class

摘要： import math import matplotlib.pyplot as plt class Gaussian(): """ Gaussian distribution class for calculating and visualizing a Gaussian distribution. 阅读全文

posted @ 2020-05-28 01:40 Zhentiw 阅读(386) 评论(0) 推荐(0)

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