cGandom

Emulating Raspberry Pi 4 with Qemu

Just a quick update before we dive in: what we're actually doing here is running Raspberry Pi OS (64-bit) on a QEMU virtual ARM setup. This isn't full-blown hardware emulation of the Raspberry Pi 4, but more about creating a virtual environment for the OS. It doesn't mimic all the specific hardware features of the Pi 4, but it's pretty useful and great for general testing. I turned to this solution mainly to extract a modified sysroot from the Raspberry Pi OS, something not readily available in other resources. For those looking into detailed emulation of the actual Raspberry Pi 4's hardware in QEMU, check out this link for the latest updates: https://gitlab.com/qemu-project/qemu/-/issues/1208.

Hope it helps! :D

Shortcomings: No GUI yet, only console.

Steps

wd5gnr

#include <sqlite3.h>
#include <stdio.h>

int main(int argc, char *argv[])
{
  sqlite3 *db;
  sqlite3_stmt *sql;
  int rv;

  rv=sqlite3_open("parts.db",&db);

walles

#!/usr/bin/env bash

set -euo pipefail

cd "$(bazel info workspace)"

WORKSPACE_NAME=$(basename "$PWD")

cat << EOF > ./.project
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>

lroman242

package main

import (
	"log"
	"github.com/tarm/serial"
	"bufio"
	"fmt"
)

func main() {

wwerner

vlingo/schemata links

Thanks for attending! ❤️

If you want to play with vlingo/schemata again or want to learn more, here are some pointers.

• docker image: https://hub.docker.com/r/vlingo/vlingo-schemata
• docs: https://docs.vlingo.io/vlingo-schemata
• sources: https://github.com/vlingo/vlingo-schemata
• maven plugin: https://search.maven.org/artifact/io.vlingo/vlingo-build-plugins

mmizutani

Table of Contents

• References
• Other cheatsheets
• multiple gcloud config configurations
  • switch gcloud context with gcloud config
• auth
• info
• projects
• zones

mustafaakin

import org.apache.commons.lang3.time.StopWatch;
import org.apache.commons.math3.ml.clustering.CentroidCluster;
import org.apache.commons.math3.ml.clustering.Clusterable;
import org.apache.commons.math3.ml.clustering.DoublePoint;
import org.apache.commons.math3.ml.clustering.KMeansPlusPlusClusterer;
import org.apache.commons.math3.random.*;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

mustafaakin

import org.json.JSONObject;
import org.json.JSONTokener;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;

public class Test {

peschee

Sometimes, we have to access git repositories over SSL and the server only provides a self-signed certificate 🙈. Although there are ways to increase the trust level for the self-signed certificate (https://confluence.atlassian.com/fishkb/unable-to-clone-git-repository-due-to-self-signed-certificate-376838977.html, https://confluence.atlassian.com/bitbucketserverkb/resolving-ssl-self-signed-certificate-errors-806029899.html), my recommendation is to just ignore SSL verification alltogether.

Prepend GIT_SSL_NO_VERIFY=true before every git command run to skip SSL verification. This is particularly useful if you haven't checked out the repository yet.

Run git config http.sslVerify false to disable SSL verification if you're working with a checked out repository already.

andreafspeziale

Lisk blockchain database structure

Lisk is a blockchain application platform and crypto-currency, which offers an all round solution for Node.js and JavaScript developers to deploy their own blockchain applications.

You can find a very nice documentation about Lisk here but some useful iformation like the complete database structure are missing.

This gist aims at telling you more about where the Lisk blockchain is stored. The following notes are taken from the study of Lisk testnet 0.9.3a version.

Database