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今日推荐开源项目：《一个小巧的 web 前端应用构建框架 hyperapp》
推荐理由：现在使用 React+Redux “全家桶”的方式构建一个前端应用使用得十分广泛，但是当我们在构建一个简单的小应用的时候，使用 React+Redux “全家桶”的话，引入的 js 文件体积和构建配置等都会觉得有点复杂，但是不要慌，hyperapp 可以让你开发得快又开发得爽。
基本介绍
hyperapp 是一个小巧的类 Elm 架构的 web 应用构建框架。
- 和 react 一样支持 JSX ，因此对组件的创建十分方便，同样组件书写方式也和 react 相近
- 支持服务端渲染，有助于 SEO
- 构建在 virtual dom 之上性能有保证
- 支持组件生命周期
如何使用
在这里给你一段代码，保存为一个 *.html 文件打开它就能看到最基本的效果了。
<html>
<body>
<script src="https://unpkg.com/[email protected]/dist/hyperapp.js"></script>
<script>
const { h, app } = hyperapp
const state = {
count: 0
}
const actions = {
down: value => state => ({ count: state.count - value }),
up: value => state => ({ count: state.count + value })
}
const view = (state, actions) =>
h("div", {}, [
h("h1", {}, state.count),
h("button", { onclick: () => actions.down(1) }, "–"),
h("button", { onclick: () => actions.up(1) }, "+")
])
window.main = app(state, actions, view, document.body)
</script>
</body>
</html>
而你看到引入的 https://unpkg.com/[email protected]/dist/hyperapp.js 这个文件解压后只有 4k 左右，十分轻量。并且不需要使用任何的前端工程构建工具，只要直接引入 js 即可，十分适合快速开发上线的小应用。
如果你感兴趣，想继续深入可以看看它的文档，如果你是一个前端小白,那尝试去理解文档中的一些概念，然后顺势去寻找相关资料，会让你对的眼界和知识带来非常大的提升，由此框架引申出去的概念都是目前前端开发的 fashion。
周边生态
显然周边生态相对于 react, vue 等来说是比较薄弱的，开源社区也没有相关的组件库，react,vue 等框架有应用开发的全套服务是 hyperapp 无法比拟的，但是恰恰正符合 hyperapp 的风格。hyperapp 适用于构建简单小巧的应用，如果有更复杂更工程化的就让 react,vue 一类去干吧。
但是官方也有 router，logger，html 等一些功能上的增强库，可以去 github 搜索一下还可以看看有没有其他相关的项目
试用与案列
在 reddit 淘到一个 demo 来展示使用 hyperapp 的效果.
你也可以直接在线上编辑代码进行运行查看效果，地址戳我
关于
hyperapp 目前在 github 有一个 organization ，里面有好多开发者在维护，如果你有兴趣可以先看看如何对项目做贡献。
hyperapp 从第一次 commit 到现在才过去一年左右的时间，正在不断地发展其生态，肯定会越来越棒，值得一试，小编正在想如何基于此搞点事情~，如果您有兴趣的话赶快去官网看看它的动态吧。
今日推荐英文原文：《How to think like a programmer — lessons in problem solving》原文作者：Richard Reis
原文链接：https://medium.freecodecamp.org/how-to-think-like-a-programmer-lessons-in-problem-solving-d1d8bf1de7d2
推荐理由：像个男人一样去战斗？像个真正的程序员一样去思考？but how？通过解决问题获得了什么经验教训，形成怎样应该有的思考方式？
How to think like a programmer — lessons in problem solving
If you’re interested in programming, you may well have seen this quote before:
“Everyone in this country should learn to program a computer, because it teaches you to think.” — Steve Jobs
You probably also wondered what does it mean, exactly, to think like a programmer? And how do you do it??
Essentially, it’s all about a more effective way for problem solving.
In this post, my goal is to teach you that way.
By the end of it, you’ll know exactly what steps to take to be a better problem-solver.
Why is this important?
Problem solving is the meta-skill.
We all have problems. Big and small. How we deal with them is sometimes, well…pretty random.
Unless you have a system, this is probably how you “solve” problems (which is what I did when I started coding):
- Try a solution.
- If that doesn’t work, try another one.
- If that doesn’t work, repeat step 2 until you luck out.
Look, sometimes you luck out. But that is the worst way to solve problems! And it’s a huge, huge waste of time.
The best way involves a) having a framework and b) practicing it.
“Almost all employers prioritize problem-solving skills first.
Problem-solving skills are almost unanimously the most important qualification that employers look for….more than programming languages proficiency, debugging, and system design.
Demonstrating computational thinking or the ability to break down large, complex problems is just as valuable (if not more so) than the baseline technical skills required for a job.” — Hacker Rank (2018 Developer Skills Report)
Have a framework
To find the right framework, I followed the advice in Tim Ferriss’ book on learning, “The 4-Hour Chef”.
It led me to interview two really impressive people: C. Jordan Ball (ranked 1st or 2nd out of 65,000+ users on Coderbyte), and V. Anton Spraul (author of the book “Think Like a Programmer: An Introduction to Creative Problem Solving”).
I asked them the same questions, and guess what? Their answers were pretty similar!
Soon, you too will know them.
Sidenote: this doesn’t mean they did everything the same way. Everyone is different. You’ll be different. But if you start with principles we all agree are good, you’ll get a lot further a lot quicker.
“The biggest mistake I see new programmers make is focusing on learning syntax instead of learning how to solve problems.” — V. Anton Spraul
So, what should you do when you encounter a new problem?
Here are the steps:
1. Understand
Know exactly what is being asked. Most hard problems are hard because you don’t understand them (hence why this is the first step).
How to know when you understand a problem? When you can explain it in plain English.
Do you remember being stuck on a problem, you start explaining it, and you instantly see holes in the logic you didn’t see before?
Most programmers know this feeling.
This is why you should write down your problem, doodle a diagram, or tell someone else about it (or thing… some people use a rubber duck).
“If you can’t explain something in simple terms, you don’t understand it.” — Richard Feynman
2. Plan
Don’t dive right into solving without a plan (and somehow hope you can muddle your way through). Plan your solution!
Nothing can help you if you can’t write down the exact steps.
In programming, this means don’t start hacking straight away. Give your brain time to analyze the problem and process the information.
To get a good plan, answer this question:
“Given input X, what are the steps necessary to return output Y?”
Sidenote: Programmers have a great tool to help them with this… Comments!
3. Divide
Pay attention. This is the most important step of all.
Do not try to solve one big problem. You will cry.
Instead, break it into sub-problems. These sub-problems are much easier to solve.
Then, solve each sub-problem one by one. Begin with the simplest. Simplest means you know the answer (or are closer to that answer).
After that, simplest means this sub-problem being solved doesn’t depend on others being solved.
Once you solved every sub-problem, connect the dots.
Connecting all your “sub-solutions” will give you the solution to the original problem. Congratulations!
This technique is a cornerstone of problem-solving. Remember it (read this step again, if you must).
“If I could teach every beginning programmer one problem-solving skill, it would be the ‘reduce the problem technique.’
For example, suppose you’re a new programmer and you’re asked to write a program that reads ten numbers and figures out which number is the third highest. For a brand-new programmer, that can be a tough assignment, even though it only requires basic programming syntax.
If you’re stuck, you should reduce the problem to something simpler. Instead of the third-highest number, what about finding the highest overall? Still too tough? What about finding the largest of just three numbers? Or the larger of two?
Reduce the problem to the point where you know how to solve it and write the solution. Then expand the problem slightly and rewrite the solution to match, and keep going until you are back where you started.” — V. Anton Spraul
4. Stuck?
By now, you’re probably sitting there thinking “Hey Richard… That’s cool and all, but what if I’m stuck and can’t even solve a sub-problem??”
First off, take a deep breath. Second, that’s fair.
Don’t worry though, friend. This happens to everyone!
The difference is the best programmers/problem-solvers are more curious about bugs/errors than irritated.
In fact, here are three things to try when facing a whammy:
- Debug: Go step by step through your solution trying to find where you went wrong. Programmers call this debugging (in fact, this is all a debugger does).
“The art of debugging is figuring out what you really told your program to do rather than what you thought you told it to do.”” — Andrew Singer
- Reassess: Take a step back. Look at the problem from another perspective. Is there anything that can be abstracted to a more general approach?
“Sometimes we get so lost in the details of a problem that we overlook general principles that would solve the problem at a more general level. […]
The classic example of this, of course, is the summation of a long list of consecutive integers, 1 + 2 + 3 + … + n, which a very young Gauss quickly recognized was simply n(n+1)/2, thus avoiding the effort of having to do the addition.” — C. Jordan Ball
Sidenote: Another way of reassessing is starting anew. Delete everything and begin again with fresh eyes. I’m serious. You’ll be dumbfounded at how effective this is.
- Research: Ahh, good ol’ Google. You read that right. No matter what problem you have, someone has probably solved it. Find that person/ solution. In fact, do this even if you solved the problem! (You can learn a lot from other people’s solutions).
Caveat: Don’t look for a solution to the big problem. Only look for solutions to sub-problems. Why? Because unless you struggle (even a little bit), you won’t learn anything. If you don’t learn anything, you wasted your time.
Practice
Don’t expect to be great after just one week. If you want to be a good problem-solver, solve a lot of problems!
Practice. Practice. Practice. It’ll only be a matter of time before you recognize that “this problem could easily be solved with <insert concept here>.”
How to practice? There are options out the wazoo!
Chess puzzles, math problems, Sudoku, Go, Monopoly, video-games, cryptokitties, bla… bla… bla….
In fact, a common pattern amongst successful people is their habit of practicing “micro problem-solving.” For example, Peter Thiel plays chess, and Elon Musk plays video-games.
“Byron Reeves said ‘If you want to see what business leadership may look like in three to five years, look at what’s happening in online games.’
Fast-forward to today. Elon [Musk], Reid [Hoffman], Mark Zuckerberg and many others say that games have been foundational to their success in building their companies.” — Mary Meeker (2017 internet trends report)
Does this mean you should just play video-games? Not at all.
But what are video-games all about? That’s right, problem-solving!
So, what you should do is find an outlet to practice. Something that allows you to solve many micro-problems (ideally, something you enjoy).
For example, I enjoy coding challenges. Every day, I try to solve at least one challenge (usually on Coderbyte).
Like I said, all problems share similar patterns.
Conclusion
That’s all folks!
Now, you know better what it means to “think like a programmer.”
You also know that problem-solving is an incredible skill to cultivate (the meta-skill).
As if that wasn’t enough, notice how you also know what to do to practice your problem-solving skills!
Phew… Pretty cool right?
Finally, I wish you encounter many problems.
You read that right. At least now you know how to solve them! (also, you’ll learn that with every solution, you improve).
“Just when you think you’ve successfully navigated one obstacle, another emerges. But that’s what keeps life interesting.[…]
Life is a process of breaking through these impediments — a series of fortified lines that we must break through.
Each time, you’ll learn something.
Each time, you’ll develop strength, wisdom, and perspective.
Each time, a little more of the competition falls away. Until all that is left is you: the best version of you.” — Ryan Holiday (The Obstacle is the Way)
Now, go solve some problems!
每天推荐一个 GitHub 优质开源项目和一篇精选英文科技或编程文章原文，欢迎关注开源日报。交流QQ群：202790710；电报群 https://t.me/OpeningSourceOrg
