Ruby comes with a class BigDecimal which you can use for arbitrary precision arithmetic. You should use BigDecimal instead of...
We released a new version of cucumber_factory, which stabilizes the use of transient record references within your steps.
Since images are magnitudes larger in file size than text (HTML, CSS, Javascript) is, loading the images of a large...
To make CSS rules dependent on the screen size, we use media queries: @media (max-width: 500px) { // rules for screen...
When your Cucumber feature needs to browse the page HTML, and you are not sure how to express your query...
Creating records in specs can be so fast that two records created instantly after one another might have the same...
Several Rails migration methods accept index: true as an option to create an index. In some cases (like #add_column...
Use return to return from a method. return accepts a value that will be the return value of the...
In Active Record you can use named bindings in where-conditions. This helps you to make your code more readable...
With puma you can have concurrent requests. There are two concepts on how Puma can handle two incoming requests: Workers...
Slides for Henning's talk on Sep 21st 2017. Understanding sync vs. async control flow Talking to synchronous (or "blocking...
The parallel-gem is quite easy to use and can speed up rendering time if you want to render the...
Chrome allows you to throttle the Network and the CPU. Both settings are useful to measure the performance of you...
Embedding videos on a website is very easy, add a tag to your source code and it just works...
Code comments allow for adding human readable text right next to the code: notes for other developers, and for your...
Here are some popular mistakes when using nested forms: You are using fields_for instead of form.fields_for.
TL;DR Use the #remove_ ! method to delete attachments. Also, save the record after removing the file!
Say you have a User with a Carrierwave attribute #avatar: class User < ActiveRecord::Base mount_uploader :avatar, AvatarUploader end