Nick Shin's Programming Cheatsheets

This page will list some sample code files that I have writen and have made available to the public domain.

These are mostly to help remind me a few bits of details that (when working with a pile of different programming and scripting languages) I like to copy and paste code that I use a lot (efficiently), often (lazy) or rarely (forgetful).

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C

c_cheatsheet1.c

• will describe design patterns in C (even though patterns are normally used with Object Oriented languages)
  • creational patterns
  • structural patterns
  • behavioral patterns
  • design principles

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C++

cpp_cheatsheet1.cpp

• covers the following C++ usage:
  • constructors
  • destructors
  • base, derived, multiple inheritance and friendship classes
  • private vs protected vs public member data access
  • pure and basic virtual function declarations
  • polymorphism
  • type casting

cpp_cheatsheet2.cpp

• covers the following C++ usage:
  • templates
  • const-ness
  • dynamic memory
  • exceptions

cpp_cheatsheet3.cpp

• covers the following:
  • STL programming
    • containers
    • algorithms
  • some Boost library features
    • foreach
    • smart pointers
  • and using class string

external links:

• Bartlomiej Filipek - an amazing resource on all things c++
• The World Map of C+++ STL Algorithms - a fun way to learn 105 STL Algorithms in less than an hour
• lvalues and rvalues in C++ - and more great C++ crash course videos
• keep a page opened to: cppreference.com

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LLVM

LLVM_Clang_cheatsheet1 (coming soon)

• notes and boilerplate LLVM & Clang project

external links:

• the list is so large, they are placed here: LLVM_external_links

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Perl

perl_cheatsheet1.pl.inc

• written to be included in by perl_cheatsheet2 and contains the following perl snippets:
  • unique sort
  • time n date
  • file notes
  • wget

perl_cheatsheet2.pl

• executable and contains more perl snippets:
  • file IO
  • fork
  • arrays, arrays of arrays, array references, slice n splice
  • hashes, hashes of arrays, hash references
  • references to functions
  • and some boiler plate code

perl_cheatsheet3.pm

• example perl module

perl_cheatsheet4.pl

perl_cheatsheet5.pl

• using the perl module
• while showing the tiny differences on:
  • require
  • use
  • fully qualified names
  • automatic exported names
  • controlled (manually) exported names

external links:

• good collection of perl tips: Perl Training Australia - Perl Tips
• and if you ever thought to yourself, "someone has to have written this in PERL"... chances are: someone did and threw it up on CPAN

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Python

python_cheatsheet1.py

• covers the following python usage:
  • some of my most used python snippets
  • file IO
  • dictionary
  • lists, tuples and arrays
  • classes

here are some more python code i have made free to the public:

• https://www.nickshin.com/bookmark_tools/

external links:

• keep a page opened to: Python: Library Reference
• and if you ever thought to yourself, "someone has to have written this in PYTHON"... chances are: someone did and threw it up on PyPI

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Ruby

Please see my networking notes for more sample code written in Ruby used to generate the all of the network code and pretty printed HTML files.

external links:

• Ruby for the Attention Deficit Disorder Programmer cheatsheet/crash course
• on command line arguments:
  • stackoverflow.com
  • o'reilly linuxdevcenter.com
• and if you ever thought to yourself, "someone has to have written this in RUBY"... chances are: someone did and threw it up on RubyGems

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Network

network_notes1.rb

• covers networking sockets (open read write close) (for both peer2peer and multi-users) in:
  • C/C++
  • C#
  • Exlixir
  • GoLang
  • Java
  • Node.js
  • Perl
  • Python
  • Ruby
  • Scala

if the "all in one file" is too confusing to look at (hurray for VIM! ":set filetype=lang"), run the script to generate all of the network code for the different programming languages:

ruby network_notes1.rb code

network_notes2.md

• covers the following networking snippets:
  • Node.js
    • http(s)://
    • ws(s)://
    • AMQP(s)://
    • XMPP(s)://
  • Let's Encrypt
  • HTTPd
    • SSL
    • CGI / FastCGI
  • AMQP
    • RabbitMQ
  • XMPP
    • ejabberd
      • writing server components
      • websockets
      • HTTP binding
      • admin

network_notes2_htaccess.pl (OLD)

• generates .htaccess files (for authentication access) for
  • Apache
  • lighttpd

network_notes3.md

• covers the following networking snippets:
  • Concurrency
  • WebSockets
  • WebRTC
  • SSL (libraries)
  • behind firewall (STUN TURN ICE)

my notes on:

• wireguard.md
• openvpn.md
• stunnel.md
• smtp.md

external links (Writing Network Servers)

• the list was getting large, they are placed here: network_external_links

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HTML5

HTML5-cheatsheet1 (OLD)

• WARNING: i do not use these anymore -- left here for reference...
• covered things like: screen orientation, audio, video, websockets and webstorage

HTML5-cheatsheet2 (OLD)

• WARNING: i do not use these anymore -- left here for reference...
• covered demos like: audio, drag & drop, pointerlock and swipegesture

HTML5-cheatsheet3

• was going to cover the following topics:
  • emscripten
    • web assembly
    • webgl2
    • multi-threading
    • file manager (async and local storage)
• much of this work was plowed into:
  • UnrealEngineHTML5
    • run your UE4 projects in the (latest) browsers!
    • i helped maintained this for a handful of years until EPIC has ended official support of the HTML5 platform the end of 2019

external links:

• HTML5 Gamepad Tester - fantastic way to test your gamepads on your OS on your browser
• three.js - the mother load of all things 3D in HTML5
• d3js.js - the mother load of all things data-driven-docs in HTML5

favorite browser extensions:

• uBlock Origin
• Video Speed Controller
• Markdown Viewer
• Dark Mode

favorite mobile browser:

• Firefox Focus
  • for Android
  • for iOS

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PHP

php_cheatsheet1.php

• covers the following PHP usage:
  • predefined variables: _GET _POST _SERVER _FILES
  • binary and file handling
  • passing by reference
  • classes

php_cheatsheet2.php

• covers the following PHP usage:
  • user agent detection
  • crafted headers
  • memcache
  • NoSQL (coming soon, my most used snippets...)

external links

• it might be useful to enable PHP: short_open_tag
• keep a page opened to: PHP: function reference

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Linux

docker_cheatsheet1.md

• covers the following:
  • some of my most used docker snippets
  • local/private registry notes

docker_cheatsheet2.md (coming soon)

• provisioning (machine)
• clustering/scheduling (swarm & swarmkit)
• orchestration (composer)
• service discovery
• monitoring/security

docker_cheatsheet3.md (coming soon)

• my favorite Dockerfiles
• unikernels

LLVM_Linux_cheatsheet1.sh

• notes on building LLVMLinux with LLVM, Clang and LLDB

linux_writingdevicedrivers1.md

• covers the following:
  • kernel module programming
  • character device driver
  • usb stick example

linux_SSD.md

• notes on SolidStateDrive optimizations, display DPI settings and surface pro 3 configurations

external links:

• the list was getting large, they are placed here: Linux_external_links

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Vim

https://github.com/nickshin/vimfiles

• latest vimrc file I use:

  • editor configuration
  • plugin mapings
  • and some archived configs and maps for reference

• my vim_notes.txt on plugins & stuff

  • a list of plugins i found useful in the past or currently
  • a bit of how to use them and where to find them
  • and old settings that i used to use...

• vim_fetch.sh plugins

  • normally, plugins only need be placed in: .vim/bundle
  • but sometimes, some packages needs some extra hand holding to get em working (especially when working on a bunch of different OS)
  • this script helps me remember them

external links:

• HowTos:

  • Vim Book (get a hard copy so you can write notes in it...)
  • Derek Wyatt's Vim Tutorial Videos (HIGHLY RECOMMENDED !!! excellent crash course on Vim)
  • vimcasts.org (MUST WATCH for intermediate Vim users)
  • :h index (HIGHLY RECOMMENDED !!! after watching the vids above, spend a night with this help page -- don't jump out of it, just skim and keep re-skim'ing this page -- and you will be well on your way to mastering Vim)

• Tips:

  • vim quick reference card
  • Graphical vi-vim Cheat Sheet and Tutorial
  • How to paste text into Vim command line (advanced -- and a lot of good info on registers)
  • vim tips (NOTE: you may need to click on this link twice -- the first time may send you to a vim webring...)

• Writing your own plugins:

  • Writing Vim Plugins by steve losh
    • :help usr_41
    • :help write-plugin
    • A Byte of Vim by Swaroop C H
      • search for "en:Scripting"
    • Learning the vi Editor/Vim/VimL Script language

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3D Math

3D_notes1

• covers the following 3D math:
  • matrix math
  • vector math
  • lines w/ points, lines, circles equations
  • planes w/ points, lines, planes equations

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Misc

• my bookmarks
• Git-LFS (with GitLab)
• rsync
• sql

external links:

• Git:

  • GIT cheat sheet
  • Understanding the GitHub Flow
  • How to Create a shared Git Repository in Debian (ssh, git-daemon, gitweb) (onsite repository)
  • Lesser Known Git Commands
  • Git Submodules: Core Concept, Workflows, And Tips
  • Git Large File Storage
  • Git rebase
  • GitKraken Tips

• Cheat Sheets Collections

  • Cheat-Sheets.org
  • OverAPI.com

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License

Unlicense

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