tnn4

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)

Enter this in the search box along with your search terms:

Get all gists from the user santisbon.
user:santisbon

Find all gists with a .yml extension.
extension:yml

Find all gists with HTML files.
language:html

Git Subtree Basics

If you hate git submodule, then you may want to give git subtree a try.

Background

When you want to use a subtree, you add the subtree to an existing repository where the subtree is a reference to another repository url and branch/tag. This add command adds all the code and files into the main repository locally; it's not just a reference to a remote repo.

When you stage and commit files for the main repo, it will add all of the remote files in the same operation. The subtree checkout will pull all the files in one pass, so there is no need to try and connect to another repo to get the portion of subtree files, because they were already included in the main repo.

Adding a subtree

Let's say you already have a git repository with at least one commit. You can add another repository into this respository like this:

How to add a collapsible section in markdown

1. Example

Click me

Heading

Foo
Bar
- Baz

Qux

Pico HTTP Server in C

This is a very simple HTTP server for Unix, using fork(). It's very easy to use

How to use

include header httpd.h
write your route method, handling requests.
call serve_forever("12913") to start serving on port 12913

Revert the full commit

Sometimes you may want to undo a whole commit with all changes. Instead of going through all the changes manually, you can simply tell git to revert a commit, which does not even have to be the last one. Reverting a commit means to create a new commit that undoes all changes that were made in the bad commit. Just like above, the bad commit remains there, but it no longer affects the the current master and any future commits on top of it.

git revert {commit_id}

About History Rewriting

Delete the last commit

Deleting the last commit is the easiest case. Let's say we have a remote origin with branch master that currently points to commit dd61ab32. We want to remove the top commit. Translated to git terminology, we want to force the master branch of the origin remote repository to the parent of dd61ab32:

	Windows Registry Editor Version 5.00

	; Delete directories under HKEY_CURRENT_USER\Console, then run this
	; Examples: https://gist.github.com/P4/4245793

	[HKEY_CURRENT_USER\Console]
	"WindowAlpha"=dword:000000cd
	"DefaultBackground"=dword:00000000
	; black dgray
	"ColorTable00"=dword:00141414

	#!/bin/sh
	# This shell script is made by SyneArt <sa@syneart.com>
	#######################################
	# BUILD WIRESHARK ON UBUNTU OR DEBIAN #
	#######################################

	# \| THIS SCRIPT IS TESTED CORRECTLY ON \|
	# \|----------------------------------------------------------\|
	# \| OS \| Wireshark \| Test \| Last test \|
	# \|--------------------\|----------------\|------\|-------------\|

	# first: mkdir user && cd user && cp /path/to/get_gists.py .
	# python3 get_gists.py user
	import requests
	import sys
	from subprocess import call

	user = sys.argv[1]

	r = requests.get('https://api.github.com/users/{0}/gists'.format(user))

	// Filename: HttpServer.cs
	// Author: Benjamin N. Summerton <define-private-public>
	// License: Unlicense (http://unlicense.org/)

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