AngularJS Performance in Large Applications
A lot of the advice involves less separations of concerns in your code ("don't use $watch", "don't use isolated scopes"), but it's a nice summary of what eats time in Angular.
Note that for the purpose of this article "large" mostly mean "large number of watchers/bindings on a single screen". Angular doesn't automatically become large just because you have a lot of screens.
Related cards:
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...
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...
Lightning Talk: Coverage based Test Case Prioritization in Ruby on Rails
For my computer science bachelor's thesis I programmed and evaluated a CLI Test Case Prioritization (TCP) tool for makandra. It has been written as a Ruby Gem and was tested and evaluated against one Ruby on Rails project....
How to create giant memory leaks in AngularJS (and other client-side JavaScript)
This guide shows how to create an AngularJS application that consumes more and more memory until, eventually, the browser process crashes on your users.
Although this guide has been written for Angular 1 originally, most of the advice is relevant...
CarrierWave: Processing images with libvips
When you write your next CarrierWave uploader, consider processing your images with libvips instead of ImageMagick.
Reasons for libvips
There are several **upsi...
PSA: "index: true" in Rails migrations does not work as you'd expect
Several Rails migration methods accept index: true
as an option to create an index. In some cases (like #add_column
), this option is silently discarded. Know what you are doing, or use #add_index
instead.
Example
Consider the following ...
Integrating or upgrading makandra-rubocop
Introduction
Most of the time it is a tedious task to apply a code style guide to an existing code base as there are likely to be a lot of conflicts. At makandra we are using [makandra-rubocop](https://makandracards.com/makandra/62188-makandr...
Fixing flaky E2E tests
An end-to-end test (E2E test) is a script that remote-controls a web browser with tools like Selenium WebDriver. This card shows basic techniques for fixing a flaky E2E test suite that sometimes passes and sometimes fails.
Although many examples ...
How to turn images into inline attachments in emails
Not all email clients support external images in all situations, e.g. an image within a link. In some cases, a viable workaround is to turn your images into inline attachments.
Note
Rails provides a simple mechanism to achieve this:
- [h...
instance_eval behaves different in Ruby 1.8 and Ruby 1.9, use instance_exec instead
In Ruby 1.9, instance_eval
calls the block the with receiver as the first argument:
- In Ruby 1.8,
receiver.instance_eval(&block)
callsblock.call()
- In Ruby 1.9,
receiver.instance_eval(&block)
callsblock.call(receiver)
This will blo...