Pierre Lafievre treywelsh

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)

How does async work in `async-std`?

(Phaiax - 2019/12/1 - CC_BY_SA 4.0)

Lately I was porting a software from tokio/futures-1.0 to async-await. I somehow thought async-std was the successor of tokio and ported everything to async-std. 80% in, I noticed that my hyper dependency requires tokio and that it's not possible to replace tokio with async-std without also replacing hyper. Also, tokio and async-std try to solve the same problem. So I started a journey into the inners of the rust async story to find out if it is possible to use both tokio and async-std at the same time. (tl;dr: it is). I had heard of reactors and executors before, but there was much new stuff to discover.

How to reopen a pull-request after a force-push?

Precodinitions

You need the rights to reopen pull requests on the repository.
The pull request hasn't been merged, just closed.

Instructions

Write down the current commit hash of your PR-branch git log --oneline -1 <PR-BRANCH>
Write down the latest commit hash on github before the PR has been closed.
git push -f origin :

	/*
	* Arithmetic modulo 2^221 - 3 in radix 2^16 (unsigned)
	*
	* Authors:
	* - Daan Sprenkels <[email protected]>
	* - Jordi Riemens <[email protected]>
	*
	* This module uses redundant representation. Each number is represented an
	* array of 14 int64_t elements.
	*/

	#include <stdio.h>
	#include <stdlib.h>
	#include <assert.h>
	#include <math.h>
	#define NDEBUG

	int size(int n) {
	int c = 0;
	while (n) {
	n /= 10;

	package main

	import (
	"crypto/tls"
	"crypto/x509"
	"flag"
	"io"
	"io/ioutil"
	"log"
	"os"

	docker network create etcd --subnet 172.19.0.0/16

	docker run -d --name etcd0 --network etcd --ip 172.19.1.10 quay.io/coreos/etcd etcd \
	-name etcd0 \
	-advertise-client-urls http://172.19.1.10:2379,http://172.19.1.10:4001 \
	-listen-client-urls http://0.0.0.0:2379,http://0.0.0.0:4001 \
	-initial-advertise-peer-urls http://172.19.1.10:2380 \
	-listen-peer-urls http://0.0.0.0:2380 \
	-initial-cluster-token etcd-cluster-1 \
	-initial-cluster etcd0=http://172.19.1.10:2380,etcd1=http://172.19.1.11:2380,etcd2=http://172.19.1.12:2380 \

	package main

	import (
	"flag"
	"io"
	"log"
	"net"
	"net/http"
	"strings"
	)

	#!/bin/bash
	#

	BACKUPDEST="$1"
	DOMAIN="$2"
	MAXBACKUPS="$3"

	if [ -z "$BACKUPDEST" -o -z "$DOMAIN" ]; then
	echo "Usage: ./vm-backup <backup-folder> <domain> [max-backups]"
	exit 1


	sudo apt-get install qemu-utils
	sudo modprobe nbd

	sudo qemu-nbd --connect=/dev/nbd0 /full/path/to/qcow2/image/file

	sudo mkdir /mnt/ubuntu

	sudo mount /dev/nbd0p1 /mnt/ubuntu