A responsive cover image is a full width image that will adapt to any device screen. No matter what device you are using, it will always looks like full width and keeps its ratio.

So how to create this background image with a width 100% and height auto using pure css and html?

The question is will it create a retain cycle if we have an array (dictionary) of objects where the object is owned elsewhere? A short answer is YES it will.

Last year, I wrote a blog about hosting blog using Hexo and org documents. Now I have not using Emacs for my notes anymore. The main reason is that I could not visit my notes on my Phone or Tablet which I feel really inconvenient. Now I want to use convert all my .org notes into markdown format and host my markdown notes directly into my blog for convenience.

How to init the core data NSManagedObjectContext?

How to init view controller from .xib file inside a framework project?

When working with framework project after build, it will create the .framework file under the DerivedData directory. A little bit hard for us to find. Also we might want to automatically import the framework to our test project or another project that import the framework. So after setting this up, we can build this project and it will copy the .framework to a location where you import it in another project automatically. What I need to do next is to next build the other project.

How to import objective-c framework into a swift framework project?

Need to create an analytics server for the mobile app I made. I choose Piwik to self-host all the data in my own server. This is the full notes I made during the setup.

Use the following code snippet to create a repeated animation

This is about converting Data into Integer in Swift.