Who broke the build?
Retaliation is a Jenkins CI build monitor that automatically coordinates a foam missile counter-attack against the developer who breaks the build. It does this by playing a pre-programmed control sequence to a USB Foam Missile Launcher to target the offending code monkey.
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How to build the perfect number of blank records for a nested form
When you render a nested form for a Movie
which has_many :actors
, you want to render the right number of blank Actor
forms. The right number means:
- A minimum number of blank forms so the user can add more
Actors
to an existingMovie
, ...
The JavaScript Object Model: A deep dive into prototypes and properties
Speaker today is Henning Koch, Head of Development at makandra.
This talk will be in German with English slides.
Introduction
As web developers we work with JavaScript every day, even when our backend code uses anothe...
The Ruby Object Model
In Ruby (almost) everything is an Object
. While this enables a lot of powerful features, this concept might be confusing for developers who have been programming in more static languages, such as Java or C#. This card should help understanding t...
Building web applications: Beyond the happy path
When building a web application, one is tempted to claim it "done" too early. Make sure you check this list.
Different screen sizes and browsers
Desktops, tablets and mobile devices have all different screen resolutions. Does your design wor...
CSS: Matching against attributes and their values (or parts of them)
You probably know that you can use CSS selectors to match against elements and their attributes, such as:
a[title] { /* any <a> that has a "title" */ }
a[data-fancy="true"] { /* any <a> that has their "data-fancy" attribute set to "true" *...
Async control flow in JavaScript: Promises, Microtasks, async/await
Slides for Henning's talk on Sep 21st 2017.
Understanding sync vs. async control flow
Talking to synchronous (or "blocking") API
print('script start')
html = get('/foo')
print(html)
print('s...
jQuery promises: done() and then() are not the same
jQuery's deferred objects behave somewhat like standard promises, but not really.
One of many subtle differences is that there are two ways to chain callbacks to an async fu...
Use a Bash function to alias the rake command to Spring binstubs or "bundle exec" fallback
There are different ways to run rake:
- On Rails 4.1+ projects, you have Spring and its binstubs which dramatically improve boot-up time for Rake and similar. You need to run
bin/rake
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Code splitting in esbuild: Caveats and setup
TL;DR Still has caveats.
Code splitting is a feature of JavaScript bundlers that can keep huge libraries out of the main bundle.
How code splitting works
[Like Webpack](https://makandracards.com/makandra/498036-webp...
esbuild: Make your Rails application show build errors
Building application assets with esbuild is the new way to do it, and it's great, especially in combination with Sprockets (or Propshaft on Rails 7).
You might be missing some convenience features, though.
Here we cover one specific issue:
Once y...