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A half-hour to learn Zig

This is inspired by https://fasterthanli.me/blog/2020/a-half-hour-to-learn-rust/

Basics

the command zig run my_code.zig will compile and immediately run your Zig program. Each of these cells contains a zig program that you can try to run (some of them contain compile-time errors that you can comment out to play with)

To convert bytes to KB, MB, GB... for human readable

Example:

file_size=123456778

echo $file_size | awk '{ split( "B KB MB GB TB PB EB ZB YB" , v ); s=1; while( $1>1024 && s<9 ){ $1/=1024; s++ } printf "%.2f %s", $1, v[s] }'

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

By Edmond Lau
Highly Recommended 👍
http://www.theeffectiveengineer.com/

What's an Effective Engineer?

2021 Update: Easiest option is Justin's repo and image

Just run this from your Mac terminal and it'll drop you in a container with full permissions on the Docker VM. This also works for Docker for Windows for getting in Moby Linux VM (doesn't work for Windows Containers).

docker run -it --rm --privileged --pid=host justincormack/nsenter1

more info: https://github.com/justincormack/nsenter1

Configuración Básica

Configurar Nombre que salen en los commits

	git config --global user.name "dasdo"

Configurar Email

	git config --global user.email dasdo1@gmail.com

	// Stack - Object oriented implementation using arrays
	#include <iostream>
	using namespace std;
	#define MAX_SIZE 101

	class Stack
	{
	private:
	int A[MAX_SIZE]; // array to store the stack
	int top; // variable to mark the top index of stack.

	#########################################################################
	# ================================================== #
	# $ Mikrotik RouterOS update script for CloudFlare $ #
	# ================================================== #
	# #
	# - You need a CloudFlare account & api key (look under settings), #
	# a zone and A record in it #
	# - All variables in first section are obvious, except CFid, #
	# To obtain CFzoneid use following command in any unix shell: #
	# curl -X GET "https://api.cloudflare.com/client/v4/zones" -H "X-Auth-Email: YOUR_EMAIL" -H "X-Auth-Key: YOUR_API_KEY" -H "Content-Type: application/json" \| python -mjson.tool

	Java.perform(function() {
	console.log('\n[.] Cert Pinning Bypass');

	// Create a TrustManager that trusts everything
	console.log('[+] Creating a TrustyTrustManager that trusts everything...');
	var X509TrustManager = Java.use('javax.net.ssl.X509TrustManager');
	var TrustyTrustManager = Java.registerClass({
	name: 'com.example.TrustyTrustManager',
	implements: [X509TrustManager],
	methods: {

	library(XML)
	library(data.table)
	library(lubridate)
	library(ggplot2)
	library(stringr)
	library(leaflet)

	# import and divide xml file ----------------------------------------------

	# import