brandur

Go Pipelines

This document demonstrates a basic pipeline in Go and talks about a risk in in implementing them. Keep in mind that:

• Using FizzBuzz here is contrived, but quite a nice way to demonstrate the concept. Obviously there is no advantage to running the basic workload of FizzBuzz in a Goroutine, but if the task involved heavy computation or long lived I/O, it starts to make a lot more sense.
• The problem discussed only applies to Goroutines that actually need to have a way to

alirobe

### 
###
### UPDATE: For Win 11, I recommend using this tool in place of this script: 
### https://christitus.com/windows-tool/
### https://github.com/ChrisTitusTech/winutil
### https://www.youtube.com/watch?v=6UQZ5oQg8XA
### iwr -useb https://christitus.com/win | iex
###
###

lavalamp

There are three easy to make mistakes in go. I present them here in the way they are often found in the wild, not in the way that is easiest to understand.

All three of these mistakes have been made in Kubernetes code, getting past code review at least once each that I know of.

1. Loop variables are scoped outside the loop.

What do these lines do? Make predictions and then scroll down.

func print(pi *int) { fmt.Println(*pi) }

siacomuzzi

With Auth0, you can specify the algorithm used to sign your JWT tokens:

So in scenarios when you are signing JWTs with RSRS256 algorithm, you need to perform some changes in your ASP.NET Web Api in order to validate them properly.

NOTE: You can download your .cer file from https://{YOU}.auth0.com/cer endpoint.

ASP.NET Web Api (OWIN)

From app.UseJwtBearerAuthentication method, just replace SymmetricKeyIssuerSecurityTokenProvider with X509CertificateSecurityTokenProvider specifying your public signing key:

davidfowl

$/
  artifacts/
  build/
  docs/
  lib/
  packages/
  samples/
  src/
 tests/

hofmannsven

Git

Global Settings

• Related Setup: https://gist.github.com/hofmannsven/6814278
• Related Pro Tips: https://ochronus.com/git-tips-from-the-trenches/
• Interactive Beginners Tutorial: http://try.github.io/
• Git Cheatsheet by GitHub: https://services.github.com/on-demand/downloads/github-git-cheat-sheet/

Reminder

Press minus + shift + s and return to chop/fold long lines!

xamlmonkey

using System;
using System.Net.WebSockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace Coe.WebSocketWrapper
{
    public class WebSocketWrapper
    {

bradwilson

[user]
	name = Brad Wilson
	email = dotnetguy@gmail.com
[alias]
	a = add -A
	abort = rebase --abort
	amend = commit --amend -C HEAD
	bl = blame -w -M -C
	br = branch
	cat = cat-file -t

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs