“ Copy ” You should not be unfamiliar with the word , It has a scientific name called “ Quick reference table ”（cheatsheet） It is a form used to quickly find your knowledge points and answers , Because of its small size 、 Imperceptible and other characteristics , Frequently appear in examination rooms and speeches ...
Friendship tips ️： Cheating in the exam is a pleasure , Catch is the crematorium ！
I remember an exam in College , The teacher allowed each of us to bring one A4 Paper size “ Copy ” Enter the examination room , You can write anything on both sides . I take that one Dense and dense There is no blank “ Copy ”, Step into the examination room with confidence . This course has the highest score in all my classes , Later, the make-up students came to me to copy this “ Copy ”.
today , Although I won't take the exam anymore , But I still keep a cheat sheet handy . such as ： When writing code, I suddenly can't remember grammar 、 code snippet 、 command , At this time, a cheat sheet （ Quick reference table ） Can work wonders ！ With it, you can find the answer in an instant , Copy / Paste Can solve the problem , Greatly improved development efficiency .
below , It is specially prepared for programmers 「 Open source notes 」 aggregate , It contains Python、JavaScript、Linux、Git、K8s etc. , It is easy to read due to its large variety , I divided them into ： Language 、 Command and synthesis are three categories .
Gossip , Go straight to the project ！
One 、 Language class
Writing code is like writing a composition. There are times when you pick up your pen and forget your words , But this must not be allowed to interrupt the atmosphere of immersive coding . The following checklist items cover ：Python、C++、Rust、JS Language , It can make you forget grammar 、 When the operation fails , Instantly retrieve the memory and switch back to the coding process .
1.1 Python（python-cheatsheet）
Star Count ：29.5k｜ chinese ： no
Python The grammar of is very simple , It's also because it's simple that many people don't spend time deliberately remembering , With this project, you don't have to be grammar . It's right Python Common data types 、 function 、 Libraries are classified , It can help you quickly find the code fragments and syntax explanations you want , Only “ Fill in the blanks ” These codes can come right away .
from threading import Thread, RLock, Semaphore, Event, Barrier
from concurrent.futures import ThreadPoolExecutor
<Thread> = Thread(target=<function>) # Use `args=<collection>` to set the arguments.
<Thread>.start() # Starts the thread.
<bool> = <Thread>.is_alive() # Checks if the thread has finished executing.
<Thread>.join() # Waits for the thread to finish.
It is strongly recommended to new contacts Python My friends , Feel good, remember to come back and praise ！
1.2 C++（cpp-cheatsheet）
Star Count ：1.9k｜ chinese ： no
C++ It was a required course when I was in College ！ It is also the first programming language for many college students （ The nightmare ）, If you mention C++ Grammar brain is a ball of paste , It's better to look at this project. Maybe you can build a clear C++ Knowledge system , At its worst, it can be copied / Paste and write what can run C++ Code .
#include <iostream> // Include iostream (std namespace)
cin >> x >> y; // Read words x and y (any type) from stdin
cout << "x=" << 3 << endl; // Write line to stdout
cerr << x << y << flush; // Write to stderr and flush
c = cin.get(); // c = getchar();
cin.get(c); // Read char
cin.getline(s, n, '\n'); // Read line into char s[n] to '\n' (default)
if (cin) // Good state (not EOF)?
// To read/write any type T:
istream& operator>>(istream& i, T& x) {i >> ...; x=...; return i;}
ostream& operator<<(ostream& o, const T& x) {return o << ...;}
1.3 Rust（cheats.rs）
Star Count ：2.9k｜ chinese ： no
A lot of people say Rust Easy to learn, not easy to write . Here comes the Savior ！ This project not only provides basic grammar quick reference , There are also notes to be paid attention to when explaining the execution sequence and writing . If you think it's not enough , The project also includes sample code （EX）、 Books （BK）、 standard （STD） And other related materials .
On-line ：https://cheats.rs
1.4 JavaScript（modern-js-cheatsheet）
Star Count ：23k｜ chinese ： no
Now the back-end will write some front-end more or less , Maybe because I haven't learned systematically JavaScript grammar , In most cases, we write while checking . The code examples of this project are particularly rich , I hope this can save the struggling JS Partners in the grammar puzzle .
async function getUser() { // The returned promise will be rejected!
throw "User not found !";
}
async function getAvatarByUsername(userId) => {
const user = await getUser(userId);
return user.avatar;
}
async function getUserAvatar(username) {
var avatar = await getAvatarByUsername(username);
return { username, avatar };
}
getUserAvatar('mbeaudru')
.then(res => console.log(res))
.catch(err => console.log(err)); // "User not found !"
in addition , Here's another one React+TypeScript A quick look-up of , Together with ：
This project is different from the previous project , It elicits knowledge points in the form of questions and answers , And give answers and sample code .
Two 、 command
In addition to programming language in coding , It's also inseparable from many other things , such as ： Tools 、 System 、 Services, etc. , To use them efficiently, you need to remember commands , But the order is too miscellaneous 、 Too much to remember . The following items cover , frequently-used Git、Linux、K8s command , Collect it quickly and it will be used one day ！
2.1 Git（git-tips）
Star Count ：13.9k｜ chinese ： yes
Git Version management tool , It is often used in daily development . In understanding work area 、commit、 Temporary storage area 、 Local repository 、 Remote warehouse After the concept, you can get started , But when encountering some special scenes , We need the following project to save the site ！ When you don't know what to use Git When the command completes the operation or there is any simple method , Directly in this project Ctrl/Cmd+f Search , The order to solve the problem can be found immediately .
Deletions have been merged into master The branch of
git branch --merged master | grep -v '^\*\| master' | xargs -n 1 git branch -d
Here's another one GitHub Officially made Git Quick reference table .
Address ：https://education.github.com/git-cheat-sheet-education.pdf
2.2 Linux（linux-command）
Star Count ：19k｜ chinese ： yes
Developers are usually inseparable Linux operating system , and Linux The server is also a command line operation , If you don't know the command, you can't even open a file , however Linux There are too many orders for , I really can't remember everything . With this project , You can search as you like , It also supports Chinese search .
besides , Another large and comprehensive project has to be mentioned tldr：
An open source Linux Command query tool , A simplified version of man And “ as the medicine took effect , the symptoms lessened ”, It can be called 《 new edition Linux Encyclopedia of commands 》（ english ）.
project ：https://github.com/tldr-pages/tldr
2.3 Kubernetes（cheatsheet-kubernetes-A4）
Star Count ：1.5k｜ chinese ： no
With the unstoppable nature of cloud ,K8s It has also become one of the necessary skills for operation and maintenance and programmers . The project tries to be on a A4 Show its common commands on paper , Hence the name .
project ：https://github.com/dennyzhang/cheatsheet-kubernetes-A4
It is worth mentioning that the author also wrote Docker edition , Good in pairs .
3、 ... and 、 comprehensive
I have seen the quick look-up table of the above sub areas , Here are some comprehensive projects , The project use methods introduced in this part have their own characteristics ： There is something that can be printed , There are also commands to check directly , There are also web pages that can be used online , To be honest, I want to order one for myself 「 Fabulous 」 了 ！
3.1 Data processing （ds-cheatsheets）
Star Count ：10.7k｜ chinese ： no
Data processing is a wide range of fields , There are many knowledge points, including ：SQL、R、Pandas、Jupyter、 big data 、 Data visualization, etc . This project covers all the above contents , And from basic to practical . a key ！ Provides a high appearance 、 Full color PDF It can be printed out , On the wall 、 It's convenient to check it often under the screen .
3.2 Online website （cheatsheets）
Star Count ：11.8k｜ chinese ： no
This is an open source 、 Comprehensive checklist website , Covering the front end 、 Back end 、 Operation and maintenance 、IDE In many ways , And the interface is friendly and concise, and it supports online viewing .
On-line ：https://devhints.io
3.2 Command line （cheat.sh）
Star Count ：29.2k｜ chinese ： no
Finally, this project is great , It's called 「 The only quick reference table you need 」. It not only supports direct query from the command line ：
It also supports website online query ：
Either way , All geeks are full ！
On-line ：https://cheat.sh
project ：https://github.com/chubin/cheat.sh
Four 、 Last
The above is all shared in this issue 「 Open source notes 」 project , Have you found your dish ？
Often the most handy cheat sheet , It's a cheat sheet made by yourself ！ I hope these open source projects in this issue can add some content to your Codex , Or provide some ideas on the convenience of use , So as to build the most suitable for yourself 、 The most handy “ Weapon of magic ”！
Someone might ask ： Now there are AI Programming assistant （Copilot） What other notes are needed ？
Copilot It's really more convenient , But I think the process of making a cheat sheet is also The process of combing and precipitating knowledge , And maintaining an open source manuscript can not only leave a strong impression on yourself , Why not help others ！ As the saying goes ：“ From open source , Give back to open source ”.
Last , If you think the content of this issue is good ： Praise 、 Please share 、 Please forward , Your support is my greatest encouragement ！ See you next time ～
