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C# For Python Programmers

Syntax and core concepts

Basic Syntax

Single-line comments are started with //. Multi-line comments are started with /* and ended with */.
C# uses braces ({ and }) instead of indentation to organize code into blocks. If a block is a single line, the braces can be omitted. For example,

Profile	download (kb/s)	upload (kb/s)	latency (ms)
Native	0	0	0
GPRS	50	20	500
56K Dial-up	50	30	120
Mobile EDGE	240	200	840
2G Regular	250	50	300
2G Good	450	150	150
3G Slow	780	330	200

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

General rules

Follow standard conventions.
Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
Boy scout rule. Leave the campground cleaner than you found it.
Always find root cause. Always look for the root cause of a problem.

Design rules

Unfollow everyone on twitter.com

Go to https://twitter.com/YOUR_USER_NAME/following
Open the Developer Console. (COMMAND+ALT+I on Mac)
Paste this into the Developer Console and run it

// Unfollow everyone on twitter.com, by Jamie Mason (https://twitter.com/fold_left)
// https://gist.github.com/JamieMason/7580315
//

Create Self Signed Certificate using OpenSSL on a Mac

Introduction

Every now and then I need to create a self signed certificate in azure for something. In my particular case its Azure B2C. I am using a mac so its not simply just running something like

New-SelfSignedCertificate `
    -KeyExportPolicy Exportable `
    -Subject "CN=yourappname.yourtenant.onmicrosoft.com" `
 -KeyAlgorithm RSA `

Methods of Signing Git Commits on MacOS

Last updated March 13, 2024

This Gist explains how to sign commits using gpg in a step-by-step fashion. Previously, krypt.co was heavily mentioned, but I've only recently learned they were acquired by Akamai and no longer update their previous free products. Those mentions have been removed.

Additionally, 1Password now supports signing Git commits with SSH keys and makes it pretty easy-plus you can easily configure Git Tower to use it for both signing and ssh.

For using a GUI-based GIT tool such as Tower or Github Desktop, follow the steps here for signing your commits with GPG.

	Windows Registry Editor Version 5.00

	; 7-Zip Windows 11 Context Menu entries via whitelisted id reuse example by AveYo

	; Add to archive.. only single files (multiple would need a single instance redirect tool)
	[-HKEY_CURRENT_USER\SOFTWARE\Classes\*\shell\connectNetworkDrive]
	[HKEY_CURRENT_USER\SOFTWARE\Classes\*\shell\connectNetworkDrive]
	"MuiVerb"="@C:\\Program Files\\7-Zip\\7-zip.dll,-2324"
	"Position"="Middle"
	"Icon"="C:\\Program Files\\7-Zip\\7-zip.dll,0"

	#!/bin/bash
	# 停用唯讀模式
	sudo steamos-readonly disable
	# 初始化 Pacman Keys
	sudo pacman-key --init
	sudo pacman-key --populate archlinux
	# 重新安裝 glibc
	sudo pacman -S glibc --noconfirm
	# 編輯 locale.gen
	sudo sed -i "s%#zh_TW.UTF-8 UTF-8%zh_TW.UTF-8 UTF-8%" /etc/locale.gen

	socat \
	-v -d -d \
	TCP-LISTEN:1234,crlf,reuseaddr,fork \
	SYSTEM:"
	echo HTTP/1.1 200 OK;
	echo Content-Type\: text/plain;
	echo;
	echo \"Server: \$SOCAT_SOCKADDR:\$SOCAT_SOCKPORT\";
	echo \"Client: \$SOCAT_PEERADDR:\$SOCAT_PEERPORT\";
	"

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD