Explanation
“@instance:” allows us to attach an object/value to the Foo class instead of Foo’s prototype. Recall that “@” in CoffeeScript refers to JavaScript’s “this”.
After “@instance:” there is a function that is immediately executed. This function returns a function, closed around a variable called instance. Both these functions have their context (their “this”) bound to the Foo object using CoffeeScript’s wonderful “define and bind” operator “=>” as opposed to the normal function definition operator “->”.
When called, the function that “@instance” ends up referring to simply checks to see if the “instance” variable is empty and if so, assigns a new instance of Foo to it. Newing up a Foo is done using the “@” symbol since the function’s “this” refers to the Foo object. It then returns the instance.
Output
The CoffeeScript above compiles down to this:
Hi just wanted to give you a quick heads up and let you know a few of the images aren’t loading correctly.
I’m not sure why but I think its a linking issue.
I’ve tried it in two different web browsers and both show the same outcome.
Woah! I’m really enjoying the template/theme of this site.
It’s simple, yet effective. A lot of times it’s challenging
to get that “perfect balance” between superb usability and visual appearance.
I must say you have done a excellent job with this. Additionally, the blog loads super quick for me on Internet explorer.
Superb Blog!
Can I simply just say what a comfort to find an individual who really understands
what they’re talking about on the web. You certainly realize how to bring a problem to light and make it important.
More and more people need to look at this and understand this side of the story.
I was surprised you are not more popular since you certainly possess the gift.
If some one desires expert view on the topic of blogging
afterward i recommend him/her to go to see this website,
Keep up the nice work.
Admiring the commitment you put into your site and detailed information you present.
It’s awesome to come across a blog every once in a while that isn’t the same out of date rehashed
material. Excellent read! I’ve saved your site and I’m adding your
RSS feeds to my Google account.