Rubyland

In this post, we’ll learn about the Visitor design pattern and it’s tradeoffs by looking at a real world example: Rubocop, a Ruby linting and formatting library.

What is the Visitor design pattern?

The visitor design pattern separates the operation to be performed from a complex object structure (e.g. a tree whose nodes have many types).

This makes it easier to introduce new operations (“visitors”) for the same structure, at the cost that changing the object structure requires all visitors to be changed. So this pattern works best when changes to the underlying structure are rare, and we expect many different operations to be introduced.

What is Rubocop?

Rubocop is a…

This post illustrates a small but fascinating piece of the AArch64 architecture called bitmask immediates. We’ll briefly cover what AArch64 is, how it is different from other architectures, what a bitmask immediate is, and how all of this can be encoded in Rust.

For context, I work at Shopify on YJIT, a just-in-time compiler for CRuby. Lately I’ve been working on adding support for the AArch64 architecture; practically this means support for Apple M1s. Learning the ARM architecture and encoding it has been quite an adventure; you can check out our working branch if you’d like to follow along.

Fixed-width instruction sets

First, a bit of background. AArch64 is a fixed-width instruction…

Hola, this is Greg bringing you the latest news from the Rails world!

Improve failure safety for RedisCacheStore#delete_multi This PR fixes the issue when Redis is down and Rails.cache.delete_multi is called. With this change this will be gracefully handled rather than raising an exception.

Ensure drop_enum is always reversible The recently introduced drop_enum method to drop PostgreSQL Enumerated Types was not reversible with the if_exists: true option, because create_enum could not accept options. Not an issue anymore, because this PR fixes it.

Fix EtagWithFlash when there is no Flash middleware available In API only Rails apps, the flash middleware is not available which can lead to…

[00:07:35] Andrew shares a free gem idea for Juniors or people who’ve never built a gem before. 

[00:10:20] Jason brings up a previous episode with Konnor Rogers where they talked about migrating Podia off Webpacker, and the guys chat more about that.

[00:17:56] Jason was looking something up for JavaScript and he tells us he couldn’t get Google to give him any results that weren’t for jQuery, and Chris talks about the interesting idea that Rails could sort of simplify Webpack with Webpacker, which they’ve done with jQuery, Prototype, and Scriptaculous.

[00:20:35] We hear about why CoffeeScript was such a welcomed flavor of JavaScript.

[00:22:23] Chris tells us what you can do using…

In our previous blog post we introduced AppFolio AI Leasing Assistant, Lisa, giving a high-level overview of her capabilities and insight into the value she can offer. One of the key technical components which enables Lisa to perform so effectively is the Inquiry Parser.

What is Lisa’s Inquiry Parser?

The leasing conversation flow is often initiated by a prospective resident submitting an inquiry via an Internet Listing Service (ILS), such as Zillow, Apartments.com, or a private homepage for the property. The first component of Lisa to spring into action in response is the inquiry parser. We use it to extract information from inquiries, and process the data collected to facilitate a…

Thanks to the Internet, our big Earth has suddenly become a small place, in the sense that your customers on the other side of the world are now as close to you as your next door neighbor. However, the solution to the problem of distance is not everything. We have become closer, but we continue to communicate in different languages.

In addition to language barriers, there is also a cultural implication. We understand the same things in different ways; we have different systems of measurement and understanding of time. For example, in China, people understand 02.03.2021 as March 2nd, while in the USA, it is February 3rd. Also, Rails is very conventional about the app structure unless we are…

RubyGems 3.3.20 includes enhancements and bug fixes.

To update to the latest RubyGems you can run:

gem update --system

To install RubyGems by hand see the Download RubyGems page.

## Enhancements:

• Include backtrace with crashes by default. Pull request #5811 by deivid-rodriguez
• Don’t create broken symlinks when a gem includes them, but print a warning instead. Pull request #5801 by deivid-rodriguez
• Warn (rather than crash) when setting nil specification versions. Pull request #5794 by deivid-rodriguez
• Installs bundler 2.3.20 as a default gem.

## Bug fixes:

• Always consider installed specs for resolution, even if prereleases. Pull request #5821 by deivid-rodriguez
• Fix ge…

In this article, we will create a Rails 7 Application and implement Infininte Auto Scroll. The scroll will be done using Hotwire Turbo only, and not a single line of Javascript will be used.

The App will display ten posts by default and on reaching the end of the page, more posts in batches of ten will be introduced further until there are no more posts.

Create a Rails 7 Application

We get started by creating a Rails 7 Application.

rails _7.0.3_ new infinite-scroll-turbo

Add a Model

We are adding a simple model with only a body attribute, to keep things simple.

rails g scaffold Post body:text
rails db:migrate

Set the Posts page as the Home Page

Change the default root to Po…

After congratulating Jemma on her talk acceptance to RubyKaigi, the duo discuss how to handle when a co-worker is departing. From handling communication to acknowledging the importance of the departing, it's a topic that should resonate with many developers. They wrap up exclaiming over first #rubyfriend.

Show Notes & Links:

• RubyKaigi 2022
• Hire Me: I'm Excellent at Quitting by Brittany Martin - YouTube
• first #rubyfriend

Sponsored By:

Scout APM

Try their error monitoring and APM free for 14-days, no credit card needed! And as an added bonus for Ruby on Rails listeners: Scout will donate $5 to the open-source project of your choice when you deploy. Learn more at http://scout…

In the first part of this two-part series on memory leaks, we looked at how Ruby manages memory and how Garbage Collection (GC) works.

You might be able to afford powerful machines with more memory, and your app might restart often enough that your users don't notice, but memory usage matters.

Allocation and Garbage Collection aren't free. If you have a leak, you spend more and more time on Garbage Collection instead of doing what you built your app to do.

In this post, we'll look deeper into the tools you can use to discover and diagnose a memory leak.

Let's continue!

Finding Leaks in Ruby

Detecting a leak is simple enough. You can use GC, ObjectSpace, and the RSS graphs in your APM tool…

Welcome to the RubyGems monthly update! As part of our efforts at Ruby Central, we publish a recap of the work that we’ve done the previous month. Read on to find out what updates were made to RubyGems and RubyGems.org in July.

RubyGems News

This month in RubyGems, we released new versions of RubyGems 3.3.18, 3.3.19 and Bundler 2.3.18, 2.3.19.

The following is a non-exhaustive list of other improvements included in the above releases (see the changelog for further information):

• updated the CLI to display MFA warnings on gem signin, to support work done on the RubyGems.org side - #5590.
• added the long-requested feature of allowing to gem install from specific groups only - #5579.
• …

Security work can often be divided into two parts: people and computers. The relatively new role of security partner is ideal for those who like both, as it involves working to meet the company’s needs for a secure system and needs of engineers to have a reasonable technical solution to execute and maintain. Does it sound complicated? It is! But that’s what makes it satisfying and why the security partner role has become more common across tech companies.

Gusto’s Security Partners team sits within Product Security, and we’re far from the only company that’s recognized the need for this role.…

You’ll hardly find a Ruby on Rails developer who has never tried to deploy their applications via Heroku, a cloud-based platform which innovated how we deliver code from development to production. The git push heroku main flow is pure magic, but in order for it to work, you need to tweak your application a little bit. Today, I’d like to share my checklist targeted to small teams going live with Heroku.

At the time of this writing, in mid-2022, plenty of alternatives to Heroku are available, but it’s still the number one choice for shipping your first Rails MVP.…

More

Regular expressions (regexps) are codes that demonstrates the contents of a string. They’re generally used to test a string’s patterns and determine which portions of the string are a match to the output desired.

• Syntax: Regexp.=~()
• Parameter: Regexp values
• Return: true – if two expressions matches string, if there is no match, then it will return False.

They are usually built with the /pat/ and %r{pat} literals or the Regexp.new constructor.

A regexp is usually confined within forward slashes (/). For example:

/par/ =~ 'parrot'   #=> 0
/p/.match('parrot') #=> #<MatchData "p">

If a string has the pattern we are looking for, then it is said to be a match.

Here, the word,…

I'm thrilled to announce the new and shiny Karafka 2.0. It is an effect of my work of almost four years.

For those who wonder what Karafka is, Karafka is a Ruby and Rails multi-threaded efficient Kafka processing framework.

Karafka 2.0 is a major rewrite that brings many new things to the table but removes specific concepts that were not as good as I initially thought when I created them.

In this announcement article, I will describe the most noticeable features and improvements that got into this release. If you are interested in a more comprehensive list, you can find it here.

Note: If you are looking for upgrade notes, they will be provided as a separate article.

Getting started

If you…

My career has been both lucky and unlucky. I’ve worked in a wide range of industries and companies, super big (17,000+) and small (less than 50). I also experienced economic downturns, digital disruption, mergers, acquisitions, layoffs, and a pandemic.

That’s a lot.

I sometimes wonder how that eighteen-year-old doing a marketing internship straight out of high school is actually the same person I am now.

Disruptive forces put teams in a tough place. When you work in marketing, you collaborate with teams across all functional areas. So you see the impact of things like layoffs and industry-wide disruption.

When disruption hits your organization, and especially when it hits your team … well,…

Steph and Chris announce Joël Quenneville as the new host of the show! 🎉 Joël talks about his grand plans for where The Bike Shed is going to go from here. (Okay, maybe not grand plans...!)

Together, the group chats about unpopular opinions and hot programming takes.

This episode is brought to you by Airbrake. Visit Frictionless error monitoring and performance insight for your app stack.

Follow Joël on Twitter! Welcome him to the show.
Joël Quenneville - DRY is harmful for intermediate devs

Become a Sponsor of The Bike Shed!

Transcript

CHRIS: Thank you. No brown M&M'S. No asking me weird questions. I ask very little.

STEPH: Hello and welcome to another episode of…

Have you ever wanted to just create an active record example to someone in your team without thinking in the database setup?

Or maybe send two different models designs with some examples to see the difference, but the setup what just to difficult?

Or like me, create a bunch of examples to teach an Active Record concept?

If you have had one of this problems, maybe this tool can help you.

A tool to run Active Record examples

I want to introduce a new tool that I am working on.

It will help you play with Active Record and Postgres, without the thinking in the database setup.

You will be able to declare the schema, models, seeds and examples in just one file, like this:

schema do
  creat…

My e-mail inbox is flooded with GitHub notifications, just like yours.

Having tried half a dozen ways to get a queue of notifications, I settled on creating a filter and use it to label the email, and remove it from the inbox, the first time I receive a new notification for a repo I am subscribed to on GitHub.

Then I check those emails in bulk and never miss anything.

Click here for the original tweet-sized version of the above.

Managing GitHub Notifications in GMail was originally published by Daniel Doubrovkine at code.dblock.org | tech blog on August 08, 2022.

Even though Test Double has been 100% remote from the start over 10 years ago, we always appreciate the opportunity to gather in communities at conferences. One of our values is Always Improving, so our Double Agents enjoy stretching themselves to grow by staying on top of what’s new at conferences, and sharing what we learn along the way. That’s been challenging the past couple of years, and we’re excited to be back.

Double Agents will be attending ElixirConf in-person and virtually this year, and what better way to mark this than helping solve problems? As part of an ElixirConf sponsorship, Test Double is offering several activities for the Elixir community. If you’re attending (in-person…

In this article we’ll go through the basics of Hotwire, as well as build a sample app using Hotwire and Ruby on Rails

If you’re developing modern single-page applications with Ruby on Rails, you’re most likely using some fancy JS framework for your UI to be updated nicely, without page reloads. And there is really not much you can do without using them, that’s kind of a standard these days… until Rails got Hotwire.

With Hotwire you can get fast and responsive web applications, but without writing a ton of JavaScript. Well, sounds great, but what is Hotwire?

In this article, we’ll go through the basics of Hotwire, as well as build a sample app using it.

What options are there for responsive…

In this tutorial, I’ll show you how to get started with test-driven development in Laravel by creating a project from scratch. After following this tutorial, you should be able to apply test-driven development in any future Laravel projects. Additionally, the concepts you will learn in this tutorial should also be applicable to other programming languages.

We’ll create a food ordering app at its most basic level. It will only have the following features:

• Search for food
• Add food to cart
• Submit order (Note that this won’t include the processing of payments. Its only purpose is saving order information in the database.)

Prerequisites

• PHP development environment (including PHP and…

Hi, Petrik here with some updates on activities in Rails and associated projects over the last week.

Allow templates to set strict locals

By default, templates will accept any locals as keyword arguments. To define what locals a template accepts, add a locals magic comment:

<%# locals: (message:) -%>
<%= message %>

Try to find a second time if find_or_create_by hits a uniqueness constraint For the case where most of the time the record is expected to exist, find_or_create_by can be made race-condition free by re-trying the find if the create failed with ActiveRecord::RecordNotUnique. This assumes that the table has the proper uniqueness constraints, if not, find_or_create_by will still…

Add support for if_exists option when removing a check constraint 

The remove_check_constraint method now accepts an …

[00:02:46] Andrew tells us about being on the Rubber Duck Dev Show livestream with Collin Jilbert. 

[00:05:14] Have you ever used Alfred? Andrew fills us in on the app and Raycast. 

[00:12:15] Chris explains the “gem mining” he’s been doing.

[00:16:38] Andrew and Chris chat about using SQLite.

[00:20:41] Andrew asks Chris if he ever thinks how much extra code it is to have to support all these different things. Chris explains why he doesn’t think it be a whole lot. 

[00:23:20] We find out when Chris is evaluating these types of decisions, if he ever tries to write performance tests, benchmarks, or something to evaluate those assumptions and he explains how he thinks about performance in…

Hello everyone, this is my first blog post on the ombulabs.com blog. I am so excited to have joined the company and to have the opportunity to write here.

I have chosen this topic because I've felt like nobody tells you how or where to start contributing. This is a problem in the first few years when entering the university or when you want to learn by yourself.

What I'd really like to highlight is to keep going.

No matter what you do, if your contribution is long or short,

in the end, the interesting thing is that you are contributing.

That being said, I’d like to mention a quick checklist to fill for helping you to find your path in the tech environment.

✔️ Find something…

In the developers’ world, there is a well known quote by Phil Karlton that goes There are only two hard things in Computer Science: cache invalidation and naming things. We usually think about that phrase in the sense that it’s hard to come up with a clear, descriptive, and concise name for the code we write (variables, methods/functions, modules/classes, etc), but sometimes, the perfect name we found can be a problem too.

With Great Power Comes Great Responsibility

Ruby allows us to do many things that could be difficult in other languages, we can modify classes and override methods on the fly, we can define new classes programmatically based on the result of other code, we can…

Agora que todo mudno sabe como funciona o básico de rede, vamos ver como funciona o básico de aplicações de rede, o que são sockets, pra que eles servem, como disso chegamos em protocolos como HTTP ou FTP e os vários detalhezinhos que complicam a cabeça de um iniciante em programação Web.

Conteúdo

• 00:00 - Intro
• 01:36 - Noção de Sockets
• 02:26 - Entendendo Comunicação Entre Processos
• 03:18 - Memória Protegida/Isolada Impede Comunicação
• 05:30 - Comunicação via Pipes
• 07:18 - Comunicação via Arquivos
• 09:56 - BSD Sockets
• 12:43 - Fluxo de conexão
• 16:54 - Portas
• 19:55 - Recapitulando navegador/DNS
• 21:15 - Exemplo de server web com Node
• 22:17 - localhost é diferente de 0.0.0.0
• 23:43 -…

SCRIPT

Olá pessoal, Fabio Akita

No começo dessa mini-série eu ia só até o…

When writing tests, it’s useful to consider that the tests are always in one of four distinct stages, and knowing which stage they are in can direct your next steps. This can make testing a bit less painful than it might otherwise be.

The four stages are:

1. The code doesn’t compile/build/parse
2. The tests produce an error (as opposed to a failure)
3. The tests are failing
4. The tests are passing

Working effectively with tests requires understanding the difference in these stages and being super careful to take only certain actions depending on what stage you are in.

When tests aren’t passing, it can be extremely frustrating trying to figure out exactly why and what to do about…

When an application runs, it performs a tremendous number of tasks. A simple to-do app can have tons of tasks like - user logins, creating to-dos, updating to-dos, deleting to-dos, and duplicating to-dos. These tasks can result in success or may end up with some errors. Hence, there is a need to monitor events happening and analyze them to identify bottlenecks in the performance of the application. This is where logging is useful.

In this article, you'll learn how to create logs in a Python application using the Python logging module. Logging can help Python developers of all experience levels develop and analyze an application's performance more quickly.

What is Logging?

Logging is the…

Post on the behalf of — Shelly Abril, Badri Sridharan, Praveen Awasthy

Nearly three million U.S. employers, representing more than 48% of the private sector workforce, use a payroll service provider (PSP) to calculate, pay and file employment tax returns. The largest payroll companies in the US deposited over 45% of all IRS employment taxes collected in 2016. PSPs often assist their clients in resolving problems or errors with their payroll tax filings and payments.

PSP clients are often small business owners that are not experts in employment taxes. PSPs collect information from their clients in order to generate their payroll tax filings and payments; this information is unique to the…

Brittany guested on the Rubber Duck Dev Show, a livestream with two Rubyists (Chris & Creston) who chat live about all the aspects of development. They talk over the origins of how Brittany became the host of The Ruby on Rails Podcast and their thoughts and struggles on project management.

Show Notes & Links:

• Rubber Duck Dev Show | Wednesdays at 8p EST

Sponsored By:

Honeybadger

Honeybadger makes you a DevOps hero by combining error monitoring, uptime monitoring and check-in monitoring into a single, easy to use platform. Go to Honeybadger.io and discover how Starr, Josh, and Ben created a 100% bootstrapped monitoring solution.

AppSignal

Monitor your apps from A to Z:…

More and more people are using Ruby on Rails to create a back-end API application for a front-end app.

But what if you want to create a rich and functional interface with JavaScript and use Rails for the back-end, without having them in separate repositories? You can create a monolithic Rails application.

This article will show you how to connect a Rails application with a front-end developed in React (without splitting the code into two separate applications). We'll also give some alternatives if React is not your framework of choice, but you like the idea of a monolithic app with a rich front-end.

But first, let’s start with an architecture overview to see why linking Rails and React is…

More

Telephone number inputs are a pretty common UI feature for tons of websites and applications. Seems simple enough to implement, right? Well, actually we need to account for a lot of different factors: What format will users input the number? Will we support international numbers? In this article, we’ll explore some background information, leaving no stone unturned, to help us effectively make these decisions, and we’ll share practical UI design tips.

With any input, the form of data we ultimately expect to receive is an important consideration. But, since this is a phone number…

Action Cable allows us to add callbacks for individual channels. These are:after_subscribe, after_unsubscribe, before_subscribe,before_unsubscribe, on_subscribe, on_unsubscribe. These callbacks areregistered individually for each Channel. Before Rails 7.1, there was no way inwhich we could register callbacks to be called before every command generically.Rails 7.1 solves this problem by providing a set of callbacks which can beregistered at the connection level. And these callbacks are called for everycommand regardless of which channel's command is being invoked.

These are the following callbacks which can be registered:

1. before_command: This callback is invoked before any command can…

In 2022 we are holding our third Rubycamp. It’s a unique bootcamp dedicated to Ruby on Rails where, for two months, participants immerse themselves in Ruby with hands-on mentoring by experts.

Steph and Chris share some big news about the future of The Bike Shed.

Steph shares an update about integrating with Knapsack Pro. Chris is excited for larger projects that will begin in the next few weeks. They answer a listener's question on keeping backlogs connected to the product vision.

This episode is brought to you by Airbrake. Visit Frictionless error monitoring and performance insight for your app stack.

Linear
RailsConf 2022 YouTube Playlist

Become a Sponsor of The Bike Shed!

Transcript:

CHRIS: We don't need Skype anymore. We live in a post-Skype world, audio flapjacks.

Hello and welcome to another episode of The Bike Shed, a weekly podcast from your…

At the time of writing this, I am a mere few days away from starting the second extended leave of my career. While mine have been parental leaves, there are other reasons you might be taking an extended break, including recovery from illness and sabbaticals based on years of service. Whatever the reason, if you have the advantage of time before the leave starts, there are a few things you can do to make the transition easier for your team and yourself.

I’ll freely admit that I didn’t do all of these things before my first leave, and it definitely caused problems for those left behind (and me when I returned). So, with all those lessons learned, here is what I’ve been doing this time to not…

Over the past year at Gusto, we’ve drastically changed how we approach Sidekiq in our main Rails monolith.

Our changes have reduced costs, reduced the number of outages, made it simpler for product engineers to use Sidekiq, and improved the customer experience.

This blog post will go through the different aspects of our Sidekiq transformation at Gusto.

What is Sidekiq?

Sidekiq is a background job queueing system written in Ruby that uses Redis for storage. It can be useful for sending emails, generating reports, or doing something that is generally too slow to handle in a web request. According to the 2022 Rails Hosting survey,…

Guzzle is a PHP HTTP client that Laravel uses to send outgoing HTTP requests to communicate with external services. Guzzle's wrapper in Laravel focuses on the most popular use cases while providing a great development experience. Using Guzzle will save you time and reduce the number of lines of code in your application, making it more readable.

A common use case is when two Laravel applications are developed, and one functions as the server while the other is the client. They will need to make requests to each other. Here are a few things we'll cover in this article:

• What is an API?
• Difference between external and internal APIs.
• What is Guzzle?
• Laravel's HTTP Client.
• Making requests.
• Ins…

Prerequisites

The following will help you keep up with this tutorial:

• Composer…

Maadwo! Emmanuel with some updates on activities in Rails over the last week.

Allow passing Hash on secure password validations You can now pass an option hash to has_secure_password. If the option evaluates to true, then has_secure_password executes along with validations, otherwise it doesn’t. 

Touch model records after ActiveStorage::Blob is analyzed Models directly associated to an ActiveStorage::Blob will now be touched if the blob in question is re-analysed, invalidating a model’s cache and fixing a race condition where a record can be requested and have a cache entry built.

Generate master.key even when require_master_key Previously, if config.require_master_key was set to true in …

Note: before starting this post, I recommend reading my other posts about procs and closures for background.

Overview

What’s the difference between a proc and a lambda?

Lambdas actually are procs. Lambdas are just a special kind of proc and they behave a little bit differently from regular procs. In this post we’ll discuss the two main ways in which lambdas differ from regular procs:

1. The return keyword behaves differently
2. Arguments are handled differently

Let’s take a look at each one of these differences in more detail.

The behavior of “return”

In lambdas, return means “exit from this lambda”. In regular procs, return means “exit from embracing method”.

Below is an example, pulled…

Confused over useEffect hook and useLayoutEffect hooks?

In this article, we will look into how useEffect and useLayoutEffect differ from each other and their use-cases.

Before we dive into the difference between the two it is worth mentioning that both the hooks -

• Handle side-effects in React
• Have an identical signature

Let’s consider a simple example of a counter.

import { useEffect, useState, useLayoutEffect } from 'react';

function App() {
 const [count, setCount] = useState(0);
  useEffect(() => {
    console.log('useEffect is fired');
    //Side effect
  }, [count]);

return(
 <div>
    <h1>Count: {count} </h1>
    <button onClick={() => setCount(count + 1)}>Increment count…

When the component is mounted Count: {count} appears on the screen. When the button is clicked the counter is incremented.

The same behavior is seen when useLayoutEffect is replaced with useEffect.

How is useEffect different from useLa…

[00:06:03] Adam gives us a brief intro and we find out about the talk he gave at RubyConf 2015 called, What If Shakespeare Wrote Ruby.

[00:09:33] We hear Adam’s background, his journey to programming, and Co-founding Zeal.

[00:14:21] Adam fills us in on where he learned Rails, and the resources he used for learning Ruby on Rails.

[00:24:52] We learn what triggers Andrew about everybody saying there’s Rails jobs but they’re all looking for Seniors, and then we find out what Adam is doing to get more involved with teaching developers and helping level up developers.

[00:34:01] Andrew and Jason share their positive mentorship experiences and what they gained from them.

[00:41:06] Adam…

Hello! The other day we talked about what happened when you press a key in your terminal.

As a followup, I thought it might be fun to implement a program that’s like a tiny ssh server, but without the security. You can find it on github here, and I’ll explain how it works in this blog post.

the goal: “ssh” to a remote computer

Our goal is to be able to login to a remote computer and run commands, like you do with SSH or telnet.

The biggest difference between this program and SSH is that there’s literally no security (not even a password) – anyone who can make a TCP connection to the server can get a shell and run commands.

Obviously this is not a useful program in real life, but our…

Confused over useEffect hook and useLayoutEffect hooks?

In this article, we will look into how useEffect and useLayoutEffect differ from each other and their use-cases.

Before we dive into the difference between the two it is worth mentioning that both the hooks -

• Handle side-effects in React
• Have an identical signature

Let’s consider a simple example of a counter.

import { useEffect, useState, useLayoutEffect } from 'react';

function App() {
 const [count, setCount] = useState(0);
  useEffect(() => {
    console.log('useEffect is fired');
    //Side effect
  }, [count]);

return(
 <div>
    <h1>Count: {count} </h1>
    <button onClick={() => setCount(count + 1)}>Increment count…

When the component is mounted Count: {count} appears on the screen. When the button is clicked the counter is incremented.

The same behavior is seen when useLayoutEffect is replaced with useEffect.

How is useEffect different from useLa…

In order to add a splash screen we'll use thereact-native-splash-screenpackage. While most of the job is done by following the installation steps,there are some additional steps we need to follow for android.

There's a concept known as the "preview window" in android which serves a basicpurpose of faking a fast launch of app when the app icon is clicked. Whilepreview window fakes fast launching, it shows an empty white screen until theapp has loaded. More info available inthisarticle.

The preview window can itself be disabled by adding the following line in theandroid/app/src/main/res/values/styles.xml file.

<item name="android:windowDisablePreview">true</item>

However disabling the preview…

RubyGems 3.3.19 includes enhancements, bug fixes and documentation.

To update to the latest RubyGems you can run:

gem update --system

To install RubyGems by hand see the Download RubyGems page.

## Enhancements:

• Display mfa warnings on gem signin. Pull request #5590 by aellispierce
• Require fileutils more lazily when installing gems. Pull request #5738 by deivid-rodriguez
• Fix upgrading RubyGems with a customized Gem.default_dir. Pull request #5728 by deivid-rodriguez
• Stop using /dev/null for silent ui for WASI platform. Pull request #5703 by kateinoigakukun
• Unify loading Gem::Requirement. Pull request #5596 by deivid-rodriguez
• Installs bundler 2.3.19 as a default gem.

##…

Rails is a framework that comes with nearly everything included, focusing on conventions over configurations. Minitest is one of these conventions. Minitest is small and fast, and it provides many assertions to make tests readable and clean.

However, many alternatives to Minitest are available. The most popular one is RSpec.

RSpec has the same goals as Minitest but focuses on readable specifications describing how the application is supposed to behave with a close match to English. Minitest purports that if you know Ruby well, it should be enough.

The RSpec project focuses on behavior-driven development (BDD) and specification writing. Tests not only verify your application code but also…

Over the last few months, I started noticing something everywhere: startups merging or acquiring one another. Some are old clients, some are potential clients, some are companies where friends work. This article comprises the collection of advice I’ve wanted to share with them before they complete the deal to make “happily ever after” a higher chance of success.

The reasons for a merger and acquisition vary: to end a resource-draining competition, to gain access to valuable client contracts, to access lucrative technology or functionality, to extend the runway for a business, and so on. One thing…

A memory leak is an unintentional, uncontrolled, and unending increase in memory usage. No matter how small, eventually, a leak will cause your process to run out of memory and crash. Even if you periodically restart your app to avoid this crash (no judgment, I've done that!), you still suffer the performance implications of a memory leak.

In this post, the first of a two-part series on memory leaks, we'll start by looking at how Ruby manages memory, how Garbage Collection (GC) works, and how to find a leak.

In the second part, we'll take a deeper dive into tracking down leaks.

Let's get started!

Ruby Memory Management

Ruby objects are stored on the heap, and each object fills one slot on…

Rails 7.1 allows audio_tag and video_tag ActionView helpers to receiveActive Storage Attachments which implicitly unpacks the asset path to beincluded in the src attribute of the <audio></audio> and <video></video>tags.

Previously, the helper methods recieved only the asset path/url. To get theasset path of an Active Storage Attachment, we had to explicitly callpolymorphic_path on the attachment, which returned the desired asset path.

Before

audio_tag(polymorphic_path(user.audio_file))# => <audio src="/..."></audio>video_tag(polymorphic_path(user.video_file))# => <video src="/..."></video>

After

audio_tag(user.audio_file)# => <audio src="/..."></audio>video_tag(user.video_file)# => <video…

Irina Nazarova is the CEO of Evil Martians, a consulting company known as authors of PostCSS, AnyCable, imgproxy, and many blog posts and tutorials. She and Brittany discuss both her developer and CEO origin stories, sustainable opensource, leading really talented developers and Google Apps Script.

Show Notes & Links:

• Evil Martians
• whitequark/parser: A Ruby parser. - GitHub
• All of the Evil Martians's Open Source Libraries
• Google Apps Script
• Irina Nazarova (@inazarova) · Twitter

Support Ukraine:

• Nova Ukraine
• Razom for Ukraine

Sponsored By:

Scout APM

Try their error monitoring and APM free for 14-days, no credit card needed! And as an added bonus for Ruby on Rails…

Two things I read recently were commentary on forcefully-weak communications.

The first, from a r/rails thread in which the poster wrote “I hate React as it’s not using MVC pattern and It’s not organised + I hate JS.” A response:

You mentioned that you’re looking for junior positions which implies that you’re relatively new to the industry and have limited programming experience. Despite this, it seems that you’ve developed a lot of strong opinions.

There’s nothing wrong with having strong opinions and some of the best engineers are very opinionated. However, one of the biggest things you learn as you gain more experience is that you don’t know what you don’t know and that while…

Chris talks about a small toy app he maintains on the side and working with a project called capybara_table. Steph is getting ready for maternity leave and wonders how you track velocity and know if you're working quickly enough?

They answer a listener's question about where to get started testing a legacy app.

This episode is brought to you by Airbrake. Visit Frictionless error monitoring and performance insight for your app stack.

jnicklas/capybara_table: Capybara selectors and matchers for working with HTML tables

Become a Sponsor of The Bike Shed!

Transcript:

CHRIS: Just gotta hold on. Fly this thing straight to the crash site.

STEPH: Hello and welcome to another…

In Hotwire applications, you need to lean more on the fundamentals of CSS and HTML. If you’re like me, you probably learned just enough CSS to get by, but never reach for it first. But that’s changed recently and I wanted to share patterns I’ve picked up recently that improve my Rails apps.

Empty States and Turbo Streams

An extremely common pattern in Rails apps is rendering a collection of elements and if the collection is empty, render an empty state.

<div id="my_list" class="flex flex-col divide-y">
  <% if @list.size > 0 %>
    <%= render partial: "list_item", collection: @list %>
  <% else %>
    <p>
…

This works fine when rendering a typical page, but if you use…

A hands-on guide on Stripe’s Charge API Integration

Hello, everyone! In this article, I will go through a Payment Gateway Integration in a Rails API using the Stripe API. This will be a single payment approach, like a purchase. I’ve written about a recurring payment approach before. You can check it out here.

Getting Started

Stripe APIs have amazing features for e-commerces and marketplaces. To make our developer’s life easier, they offer SDK for some programming languages, including Ruby.

We will start adding the Stripe SDK Gem to our Gemfile using the following code:

gem 'stripe'

Don’t forget to run bundle install in your terminal after that.

Now you will need to create a stripe initializer file…

In this episode, Seth Tucker returns to discuss the Crystal programming language, developing a contextually-aware chatbot, developing for SEO, page loading time and ad spending. 

• Seth Tucker on DEV.to
• Seth Tucker on Twitter
• Seth Tucker on GitHub

Hi all,

RubyMine 2022.2 is now available! Below is a brief overview of the most notable features. For a detailed description of this update, please visit our What’s New page.

Support for Rails URLs

With RubyMine 2022.2 you can click links in server logs for View, Route, and other references to navigate to the corresponding files. You can now also find and navigate to the urls with Search Everywhere, autocomplete HTTP requests, and use the Endpoints tool window.

YARD

Starting with v2022.2 RubyMine recognizes YARD macro extensions and provides general coding assistance for them.

Various new features

The new version is also equipped with code insight for pattern-matched local variables, an…

Previously, saving an attachment to a record returned a boolean, indicatingwhether or not the attachment was saved to the record. This is not helpful sincewe have to dig into the record again to retrieve the attachment. Starting Rails7.1, saving an attachment to a record returns the saved attachment. We can nowconveniently use blob methods like #download, #url, #variant etc on theattachment without having to dig into the record again.

Before

# rails console>> @user = User.create!(name: "Josh")>> @user.avatar.attach(params[:avatar])=> true

After

# rails console>> @user = User.create!(name: "Josh")>> @user.avatar.attach(params[:avatar])=> #<ActiveStorage::Attached::One:0x00007f075e592380…

There are cases when we want to insert records in bulk. For eg., we have a list of users in CSV and we want to import these users in our application.

Rails has methods like delete_all or update_all to delete and update bulk records respectively. A similar method to insert bulk records was missing.

Rails 6 added insert_all, insert_all! and upsert_all to ActiveRecord::Persistence, to solve the above issue.

Before Rails 6

Before Rails 6, a bulk insert was achieved -

• Using activerecord-import gem

users = []
10.times do |i|
  users << User.new(name: "user #{i}")
end
User.import users

• Creating records one by one

10.times do |i|
  User.create!(name: "user #{i}")
end

• Using…

At the time of writing this, I am a mere few days away from starting the second extended leave of my career. While mine have been parental leaves, there are other reasons you might be taking an extended break, including recovery from illness and sabbaticals based on years of service. Whatever the reason, if you have the advantage of time before the leave starts, there are a few things you can do to make the transition easier for your team and yourself.

I’ll freely admit that I didn’t do all of these things before my first leave, and it definitely caused problems for those left behind (and me when I returned). So, with all those lessons learned, here is what I’ve been doing this time to not…

Name: Sukhraj Singh
Designation: Agent 000130
Double Agent Role: Senior Software Consultant
Special Skills: Coffee Lover, Humble, Always learning, Software freak
Aliases: LinkedIn
Location: Surrey, BC
Favorite Emoji: 😎

What impact are you proudest of in your career?

Making connections and growing as an individual. We spend a lot of time with our colleagues, even more than we spend with our families. Therefore, I strongly believe in building relationships that eventually help you to make this society a better place. Secondly, I am pretty happy with my individual growth. Of course, there is always still more room for growth, but I always try to keep learning new things.…

When ES modules was first introduced in ECMAScript 2015 as a way to standardize module systems in JavaScript, it was implemented by mandating the specification of a relative or absolute path in import statements.

import dayjs from "https://cdn.skypack.dev/dayjs@1.10.7"; // ES modules

console.log(dayjs("2019-01-25").format("YYYY-MM-DDTHH:mm:ssZ[Z]"));

This was slightly different from how modules worked in other common module systems, such as CommonJS, and when using a module bundler like webpack, where a simpler syntax was used:

const dayjs = require('dayjs') // CommonJS

import dayjs from 'dayjs'; // webpack

In these systems, the import specifier was mapped to a specific (and versioned)…

Vamos mais na prática como a internet da sua casa funciona. O que vem depois do modem. Como seu PC, seu celular, sua TV, conseguem se comunicar e acessar a internet? E se no ipv4 dizem que já acabou os possíveis endereços de IP, como continuamos usando internet sem migrar pro tal ipv6? Aliás, o que é ipv6? Vamos tirar essas coisas básicas do caminho.

Conteúdo:

• 00:00 - Introdução
• 00:47 - Tanenbaum
• 01:43 - OSI Model
• 04:39 - Configurando roteador
• 06:22 - Endereço ipv4
• 07:36 - Máscara de Rede
• 09:23 - Telefones e ramais
• 11:28 - NAT
• 14:25 - ARP
• 16:40 - Default Gateway
• 17:56 - DHCP
• 19:39 - Hubs e Switches
• 21:58 - DNS
• 26:30 - Pi-Hole (DoH)
• 27:57 - Roteamento
• 30:20 - CGNAT
• 33:20 - IPv6
• 40:23 -…

Links:

• Computer Networks (5th Edition PDF) (https://www.mbit.edu.in/wp-content/uploads/2020/05/Computer-Networks-5th-Edition.pdf)
• What is a DNS record? (https://www.cloudflare.com/learning/dns/dns-records/)
• MAC spoofing (https://en.wikipedia.org/wiki/MAC_spoofing)
• What is…

SCR…

Let’s delve into the past and think about the last time you tried to rent an apartment. Hopefully, this doesn’t trigger any painful memories…

1. First, you went to one of the familiar listing sites — Apartments.com, Zillow, or maybe even Craigslist if you’re the type to live dangerously.

2. You sent a message or made a phone call to the places that piqued your interest.

3. You heard back from some of the inquiries, but from others - silence. You might have even ended up on the phone with a grumpy landlord who acted as if you were wasting their time, or with an intern who couldn’t provide you with an ounce of concrete information.

4. Once you made a connection, you scheduled a showing to take a look at the…

On paper, the process of finding housing sounds simple and relatively straightforward. However, in practice, it’s often a convoluted process –  one that includes many hardships and unpredictability. In fact,…

Hello! Welcome to the monthly update. During June, our work was supported by Zendesk, DigitalOcean, Stitch Fix, and many others.

ruby together news

In June, Ruby Together was supported by 32 different companies, including Ruby member Zendesk. 1 company joined as a new member.

On top of that, 1 new developer signed up as a member. In total, we were supported by 127 developer members. Thanks to all of our members for making everything that we do possible. <3

RubyGems news

This month in RubyGems, we released new versions of RubyGems 3.3.16, 3.3.17 and Bundler 2.3.16, 2.3.17.

The following is a non-exhaustive list of other improvements included in the above releases (see the changelog for…

Hi, this is Greg, bringing you the latest news from the Rails world.

Fix caching of missed translations Using Object.new for the default value of a missing translation caused the cache store to return a different object when being fetched from the cache. This PR changes the default to an integer, which resolves the problem.

Add endless range example to the Active Record Querying guide Beginless/endless ranges can be used to create less than/greater than conditions with Active Record, but that was an undocumented feature before this PR added it to the Rails Guides.

Prevent ActionDispatch::ServerTiming from overwriting existing header value This change fixes the issue of ActionDispatch::Se…

A…

Welcome to Remote Ruby and thanks for joining us!  We’ve been trying to have our guest on for a really long time, and that time is here folks!  Today, we're joined by Konnor Rogers, a Developer at Microsoft known for his knowledge of all things front-end. On this episode, we’ll hear Konnor’s journey from being an EMT, getting into tech, and Andrew introducing him to Snowpack. Konnor tells us more about a new JavaScript runtime called Bun, his go-to Vite Ruby, and using Import Maps as a start tool.  The guys have some deep conversations about ESBuild, Webpack, Webpacker, Web Components, and the new Lit Web Component. Also, there’s some great Web Components on GitHub that are…

Hello friends,

I have a summer cold courtesy of my children and I’m not sure if it is making me more depressed, or providing a distraction from the depression. Either way, I got that summertime sadness fo’ sho.

What’s new

An image that lives in my head courtesy of innumerable movies: an airplane (or sail board) in a crash dive, on a bet that the dive will kick-start the engines before it intersects the ground. That has been the first half of my year: betting I could realize my vision of Graceful.Dev before I ran out of funds. It was a close one, but as of this past birthday sale, I’d say engines are green and this plane is in flight. Thank you to everyone who participated…

There’s…

Developer tools and their professional interfaces exist in a special world. Evil Martians recently encountered these rules in the blockchain world, and in the process, we had the chance to elevate a product that helps analyze smart contracts. Smart contract is a self-executing contract with the terms of the agreement between buyer and seller being directly written into lines of code. This is one of the most critical areas in the blockchain landscape since smart contracts are responsible for financial transactions.

Smart contracts testing

Certora is a series B blockchain startup. In 2022,…

I’ve been confused about what’s going on with terminals for a long time.

But this past week I was using xterm.js to display an interactive terminal in a browser and I finally thought to ask a pretty basic question: when you press a key on your keyboard in a terminal (like Delete, or Escape, or a), which bytes get sent?

As usual we’ll answer that question by doing some experiments and seeing what happens :)

remote terminals are very old technology

First, I want to say that displaying a terminal in the browser with xterm.js might seem like a New Thing, but it’s really not. In the 70s, computers were expensive. So many employees at an institution would share a single computer, and each…

All applications need some sort of check or permission that controls what each user can do and determine whether the user is authenticated. In this article, you will learn how to set up multiple user roles, as well as how user permissions can be set depending on the user role. Furthermore, I will illustrate how to use Django’s built-in Users and Groups to apply permissions to multiple users. While a lot of articles only cover user permissions and the default Django user permissions, I will take it a step further by building an application with different user roles and then set permissions based on the role of the user.

Prerequisites

To follow this article, the following are required:

• Pr…

More

Nick is officially an influencer! After Nick accidentally launched a co-host of Rubyists learning Japanese (including Brittany!), the duo chat about learning styles and recommended podcasts. Oh, and upgrade your Rails applications, listeners!

Show Notes & Links:

• Duolingo
• akr / all-ruby
• Leetcode
• Naming Things
• Rubber Duck Dev Show
• Rails Versions 7.0.3.1, 6.1.6.1, 6.0.5.1, and 5.2.8.1 have been released!

Sponsored By:

Honeybadger

Honeybadger makes you a DevOps hero by combining error monitoring, uptime monitoring and check-in monitoring into a single, easy to use platform. Go to Honeybadger.io and discover how Starr, Josh, and Ben created a 100% bootstrapped monitoring…

AppSignal

When is “measure twice, cut once” bad advice?

One of my hobbies is complaining about the tendency of software developers to view choices as binary, moralistic decisions. Measuring twice is obviously correct, and anyone who doesn’t do it is an unprofessional, evil wood waster. Either that or double measurers are a bunch of know-nothing shysters selling snake oil for exorbitant consulting fees. This black-and-white thinking is a mental shortcut that many animals take, but sometimes it’s nice to apply a little more intellectual rigour than a Pomeranian.

I’d like us to think less in terms of right and wrong when it comes to technical decisions, and think more in terms of context, costs and be…

Hello Hanami community! We’re thrilled to announce the release of Hanami 2.0.0.beta1!

App-centric revolution

With this release, we’ve revolutionized the Hanami app structure: the app/ directory is the primary home for your code, and slices are now optional.

“What's a slice?,” you may ask! Think of slices as distinct modules of your application. A typical case is to use slices to separate your business domains (e.g. billing, accounting, admin). For our earlier 2.0 alpha releases, slices were the only way to build Hanami apps, which presupposed you wanted a full modular monolith composed of multiple domains.

With this change, you can just as easily build…

Previously, relation calculations such as count would make a query even when passed a contradiction, contradiction relation means passing an empty array for eg:-

  User.where(id: []).count

It does not make sense to call a database for such contradictory relations.

Before

So, before Rails 7 was introduced, the database was called if the relation used for count, sum, average, minimum and maximum would be contradictory.

  => Product.where(title: []).count
  Product Count (4.7ms)  SELECT COUNT(*) FROM "products" WHERE 1=0
  => 0 


  => Product.where(title: []).sum(:price)
  Product Sum (17.5ms)  SELECT SUM("products"."price") FROM "products" WHERE 1=0
  => 0 


  => Product.where(titl…

Despite spending many years manually copying photo folders from hard drive to hard drive, I’ve gotten quite used to the convenience of accessing and making changes to my photos, calendars, and contacts on all devices. However, when I started to become frustrated with the amount of control I had slowly given big corporations over my life, (see The Future of Tech: Building sustainably with Open Source), I started looking for alternatives. After over a year of research, trying and using various Open Source services, it feels like a good time to share my current suite of services and walk through their pros and cons.

I chose to setup and maintain a home server to host these services, but many…

On this week's episode, I'm joined once again by Matt Swanson for a wide-ranging conversation that touches on blog writing, Hotwire, Turbo Frames, plants, making mistakes in the physical realm, books and science fiction, historic firsts and the impacts of innovation, and Stack Overflow.

• Boring Rails
• Matt Swanson on Twitter
• Matt Swanson on GitHub
• Matt Swanson on DevTo

Natural disaster movies, anyone? It's what Steph's been into, and Chris has THOUGHTS on the drilling in Armageddon.

Additionally, a chat around RuboCop RSpec rules happens, and they answer a listener's question, "how do you get acquainted with a new code base?"

This episode is brought to you by BuildPulse. Start your 14-day free trial of BuildPulse today.

• Greenland
• Geostorm
• San Andreas
• Armageddon

This episode is brought to you by Airbrake. Visit Frictionless error monitoring and performance insight for your app stack.

Become a Sponsor of The Bike Shed!

Transcript:

AD: Flaky tests take the joy out of programming. You push up some code, wait for the tests to run, and…

It's easy for an entire day to feel lost when you open the calendar and have back-to-back remote meetings.

Continue Reading

Apesar de ser Parte 2 da mini-série de redes, vou falar pouco sobre redes propriamente ditas e focar em um aspecto que tem a ver com mais coisas que só rede: detecção e correção de erros.

Já se fez essa pergunta? Dados são transmitidos como ondas eletromagnéticas por cabos de cobre ou sem fio. Bits são gravados magneticamente em mídias como HDs ou Blu-Rays. Como que nenhum bit nunca é gravado ou transmitido errado? E se é, como poderíamos saber se 1 único bit é entendido errado?

Mas não se preocupem, apesar de não ser diretamente "redes" é importante saber o episódio de hoje, mas no próximo episódio vou realmente mostrar mais de "redes".

Conteúdo

• 00:00 - Intro
• 01:20 - Recapitulando…

gem-compare v1.2.0, new contributors, and 200+ GitHub starts.

My little RubyGems plugin got some new contributions. Read the v1.0 announcement to know what’s the gem about.

New files diff

• Patrik Ragnarsson improved the full file diff originally contributed by Jared Deckard to show new files in full as well:

$ gem compare devise-otp 0.3.0 0.4.0 --diff
Fetching devise-otp-0.3.0.gem
Fetching devise-otp-0.4.0.gem
Compared versions: ["0.3.0", "0.4.0"]
  DIFFERENT files:
    0.3.0->0.4.0:
      * Deleted:
            app/controllers/devise_otp/devise/credentials_controller.rb
            app/controllers/devise_otp/devise/tokens_controller.rb
           …