JudahSan

Problem:

• The application crashed when attempting to resize the image to a size of 50px x 50px.
• ActiveStorage was properly configured with the required dependencies.

def image_as_thumbnail
    image.variant(resize_to_limit: [50, 50]).processed
end

JudahSan

3 - Create Tables

You will create 4 tables based on JSON format. For that, you will use the DynamoDBManager.create_table method.

To make it easy to access the properties of each of the tables, create the dictionaries that have the following attributes:

• table_name: Name of the table, composed of a course prefix and the table name.
• kwargs: Dictionary with additional arguments used in the DynamoDBManager.create_table method.

JudahSan

Here is the link to the GitHub Actions run where the issue occurred: GitHub Actions Run Link

The specific error message is as follows:

Error: Command exited with code 127
 at ChildProcess.exitListener (/home/runner/.config/yarn/global/node_modules/@lhci/utils/src/child-process-helper.js:51:19)

JudahSan

Africa Ruby Community(ARC) Platform

Introduction

The project aims to build a platform for African Ruby language enthusiasts to connect, share their knowledge and experience, collaborate on projects, and stay up-to-date with the latest developments in the Ruby community, whether they are seasoned developers or beginners just starting out. The platform features a variety of resources, including different chapters for different countries and cities, merchandise, and meetup information. It will also help users get information on online workshops, webinars, and meetups organized by the community, enabling them to learn from experts and network with other enthusiasts.

Project Design: https://still-snowflake-8822.animaapp.io/

Database Design: https://dbdiagram.io/d/62afab7c9921fe2a96397c1e

N.B. Please note that this project is open source, you are therefore encourage to contribute

JudahSan

package db

import (
	"database/sql"
	"fmt"

	_ "github.com/mattn/go-sqlite3"
)

var DB *sql.DB

JudahSan

Proxy works on Layer 3 while Reverse Proxy works on Layer 7 aka Load Balancer (special type of RP). Proxy generally works on IP and RP works on application layer.

Proxy reroute the port and ip while RP or Load balancer reroute the paths of url example, /image, /getRequest... and so on.

Certainly! Let's break down the concepts of proxy, reverse proxy, and load balancer:

1. Proxy Server:

JudahSan

To set up LHCI autorun in your Rails app, you can add the following steps to your Rails CI pipeline:

1. Install LHCI
2. Create a LHCI configuration file
3. Add a step to your CI pipeline that runs LHCI autorun

Install LHCI

npm install lhci

JudahSan

To add an image upload feature to your Rails application, you can use the popular gem called CarrierWave along with Amazon S3 for storage. CarrierWave allows you to easily handle file uploads in Rails applications.

Here's a step-by-step guide to integrating CarrierWave and Amazon S3 with your Rails app:

Prerequisites:

1. Set Up an Amazon S3 Bucket:
   • Go to the Amazon S3 console (https://aws.amazon.com/s3/).
   • Create a new S3 bucket where your uploaded files will be stored.

JudahSan

• Books and articles:

  • Web Operations: Concepts and Practice: https://www.amazon.com/Web-Operations-Keeping-Data-Time/dp/1449377440 by John Allspaw
  • The DevOps Handbook: How to Create World-Class Agility, Reliability, and Security in Technology Operations: https://www.amazon.com/DevOps-Handbook-World-Class-Reliability-Organizations/dp/1942788002 by Gene Kim, Jez Humble, Patrick Debois, and John Willis

• Online courses:

  • Self-Hosting with Docker and Kubernetes: https://philpep.org/blog/kubernetes-the-self-hosted-way/ by Udemy
  • Self-Hosting for Beginners: https://cyberhost.uk/getting-started/ by Coursera

• Tutorials:

• DigitalOcean tutorials on self-hosting: https://www.youtube.com/watch?v=RnpZOJFbXvU

JudahSan

Asynchronous JavaScript

• JS is a synchronous, blocking, single-threaded language

• JS is blocking - no matter how long a previous process takes, the subsequent processes won't kick off until the former is completed

• Single threaded- a thead is a process that your JS program can use to run a task. Each thread can only do one task at a time. JS has just the one thread called the main thread for executing any code.

• We need new pices outside JS to help us write asynchronous code.

• For FE, this where web browsers come into play. For BE, this is where Node.js comes into play

• Web browsers and Node.js define functions and APIs that allow us to register functions that should not be executed synchronously, and should instead be invoked asynchronously when some kind of event occurs.