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@gastricsparrow
gastricsparrow / surprised_pikachu.txt
Created December 6, 2018 06:04
Surprised Pikachu for all your test passing needs
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@ueokande
ueokande / shell-ip-address
Last active February 21, 2024 12:39
Calculating network addresses in tthe shell script
#!/bin/sh
# converts IPv4 as "A.B.C.D" to integer
# ip4_to_int 192.168.0.1
# => 3232235521
ip4_to_int() {
IFS=. read -r i j k l <<EOF
$1
EOF
echo $(( (i << 24) + (j << 16) + (k << 8) + l ))
@swalkinshaw
swalkinshaw / tutorial.md
Last active November 13, 2023 08:40
Designing a GraphQL API
@nadavrot
nadavrot / Matrix.md
Last active May 8, 2024 18:53
Efficient matrix multiplication

High-Performance Matrix Multiplication

This is a short post that explains how to write a high-performance matrix multiplication program on modern processors. In this tutorial I will use a single core of the Skylake-client CPU with AVX2, but the principles in this post also apply to other processors with different instruction sets (such as AVX512).

Intro

Matrix multiplication is a mathematical operation that defines the product of

@jdoss
jdoss / wireguard-monitor.path
Created April 15, 2018 16:38
Reload systemd-networkd on WireGuard config change
[Path]
PathChanged=/etc/systemd/network/wg0.network
PathChanged=/etc/systemd/network/wg0.netdev
[Install]
WantedBy=multi-user.target
@StevenACoffman
StevenACoffman / _MicroService Proxy Gateway Solutions.md
Last active September 28, 2023 14:54
Microservice Proxy/Gateway Solutions

MicroService Proxy Gateway Solutions

Kong, Traefik, Caddy, Linkerd, Fabio, Vulcand, and Netflix Zuul seem to be the most common in microservice proxy/gateway solutions. Kubernetes Ingress is often a simple Ngnix, which is difficult to separate the popularity from other things.

Github Star Trend:

Github Star History for Kong vs traefik vs fabio vs caddy vs Zuul

This is just a picture of this link from March 2, 2019

Originally, I had included some other solution

@santisbon
santisbon / Good taste.md
Last active July 13, 2023 15:16
What makes good taste? #linux #linus #torvalds

On Good Taste

Linus Torvalds in an interview talked about the idea of good taste in code or what I like to call elegance. As one might expect from two slides meant to make a point during a talk, he omits a lot of details to keep it short and simple. This post digs into the specifics of his example (deleting an element from a list) and adds another example (inserting an element in a list) including working code.

Example from Linus

This is an example of removing an element from a singly-linked list. It's one of the first data structures you learn about when you start learning about computer science and programming. The reason it doesn't show particularly good taste is because we have that condition at the end where we take a different action depending on whether the element we want to remove is at the beginning of the list or somewhere in the middle.

![Bad taste](http://

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.


Effective Engineer - Notes

What's an Effective Engineer?

@cecilemuller
cecilemuller / letsencrypt_2020.md
Last active April 15, 2024 02:19
How to setup Let's Encrypt for Nginx on Ubuntu 18.04 (including IPv6, HTTP/2 and A+ SSL rating)

How to setup Let's Encrypt for Nginx on Ubuntu 18.04 (including IPv6, HTTP/2 and A+ SLL rating)


Virtual hosts

Let's say you want to host domains first.com and second.com.

Create folders for their files:

@andineck
andineck / README.md
Last active January 20, 2024 21:20
Authentication and Authorization Concepts for MicroServices

auth with microservices

Authorization and Authentication are hard. when you only have to implement them once (as you do within a monolith) instead of over and over again, it makes the developer happy :-), and maybe leads to less implementation failures.

When you have a bunch of microservices, this is something that has to be considered.

Implement it once or in every microservice, or something in between?