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:
MITOLYN REVIEWS
Really impressed with the craftsmanship from Custom Contracting Roofing & Eavestrough Repair. If anyone needs reliable roofing services, check out roof replacement expenses for details.
Thanks for the landscaping ideas. I paired shrubs with a semi-open fence around the unit—looks better and keeps grass clippings from clogging the fins. Fence contractor
Thanks for the practical tips. More at best fleet insurance .
The customer service at online flooring retailer in Houston changed into prime-notch! Highly suggest them in your ground necessities.
If you’re renovating in the area, you must try once. custom contracting Cambridge—they have offers that are hard to beat. I’ve linked my experience here: Roofing company near me Cambridge
Nicely detailed. Discover more at auto glass safety features .
This is the first time someone clearly explained chiropractic vs physical therapy. I found a provider who blends both through Thousand Oaks Primary Care .