Here is a symbol of an eight note: ♪ Its two-byte hex representation is 0x266A. This card describes how to...

By convention, common protocols use a defined port, like 80 for HTTP or 443 for HTTPS. You can use nmap...

When building a web application, one is tempted to claim it "done" too early. Make sure you check this list...

Chrome's developer tools automagically choose vertical or horizontal panel layout, based on their width. You can disable that magic...

All new browsers support the new object-fit CSS property. It allows to specify how an element behaves within its...

Ever needed to use a global variable in Rails? Ugh, that's the worst. If you need global state, you...

The way that Javascript schedules timeouts and promise callbacks is more complicated than you think. This can be the reason...

to create a Gallery that has a name and has_many :images, which in turn have a...

The attached ImageLoader helper will start fetching an image and return an image that is resolved once the image is...

Sometimes you want to preload images that you will be using later. E.g. if hovering over a an area changes...

Spreewald gives you the within meta step that will constrain page inspection to a given scope. Unfortunately, this does not...

To delay your entire Jasmine test suite until the DOM is ready, add the following: beforeAll(function(done) { $(done); });

When you have a localized website, you may want to redirect users to their preferred language when they visit the...

fake_stripe spins up a local server that acts like Stripe’s and also serves a fake version of Stripe.js...

This gem gives you a rake task db:seed:dump do create a db/seeds.rb from your current database state.

You can use JavaScript to get or set cookie values on the client. Using the vanilla JavaScript API

Current webkit browsers like Chrome and Safari have a special variable in their consoles that refers to the selected DOM...

The NestedHash class allows you to read and write hashes of any depth. Examples: hash = {} NestedHash.write hash, 'a', 'b', 'c...

Some modern Javascript APIs return iterators instead of arrays. In plain Javascript you can loop through an iterator using

To upload a file via AJAX (e.g. from an ) you need to wrap your params in a FormData object.

If you want to perform a failover on another haproxy backend server this is the way you should do it...

Let's say you want to find the element with the text hello in the following DOM tree: hello