Migrating legacy jQuery code to .on() and .off()
If you need to upgrade code that uses the old jQuery methods bind, delegate, live, unbind and die, the attached article has examples how to migrate to the new on and off versions.
Related cards:
Capistrano 2: Which Capistrano hooks to use for events to happen on both "cap deploy" and "cap deploy:migrations"
When deploying an application with "cap deploy" by default [1] you only deploy your code but do not run migrations. To avoid an application to be running with code which requires database changes that did not happen yet you should use `cap deplo...
Rails: Example on how to extract domain independent code from the `app/models` folder to the `lib/` folder
This cards describes an example with a Github Client on how to keep your Rails application more maintainable by extracting domain independent code from the app/models folder to the lib/ folder. The approach is applicable to arbitrary scenarios...
How to use Simplecov to find untested code in a Rails project with RSpec and Cucumber
Simplecov is a code coverage tool. This helps you to find out which parts of your application are not tested.
Integrating this in a rails project with rspec, cucumber and parallel_tests is easy.
- Add i...
How to show jQuery event handler on element
Chrome gives you the currently selected element in the inspector with $0. If you select a button in the DOM you can set and inspect the event handler with the following two code lines:
$($0).on('click', function() { console.log('H...
How to move a window to the next monitor on Xfce, Mate and other X Window Managers
Since I use this a lot in my daily work and there were no scripts working properly for me, I made one myself.
It's actually not bound to Xfce but should work on any window manager (haven't tried it, though).
Installation
- If you don't yet ...
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...
Handy! RGB to HSL and RGB to HSV color model conversion algorithms in JavaScript - Axon Flux // A Ruby on Rails Blog
Here is a set of additive color model conversion algorithms that I found published on Wikipedia and have implemented in JavaScript.
Unobtrusive jQuery to toggle visibility with selects and checkboxes
Use this if you want to show or hide part of a form if certain options are selected or boxes are checked.
The triggering input gets an data-selects-visibility attribute with a selector for the elements to show or hide, like
<%= form.select...
AngularJS: How to force Content-Type on GET and DELETE requests
While you usually do not need a Content-Type on GET request (which have a blank body), an external API may still force you to send one.
Angular's $http service will [strip that header](https://github.com/angular/angular.js/blob/7c0731edb2f72bd...
jQuery: How to attach an event handler only once
With "attaching an event handler once" you possibly mean one of these two things:
Register a function for an event, and discard it once that event has happened
Use one instead of on.
$(element).one('eventName', function() { ... });
...