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:
Excellent information here! A good Puyallup Chiropractor can really improve your quality of life, especially in Puyallup where options abound.
Every homeowner should be aware of utility locating before starting any landscaping or digging. Great job promoting this, Utility Surveyor !
Thanks for the great advice on brushing techniques; it has really improved my oral health routine! Barnsley Dentist
Love to prepare dinner and prefer the simplest sear? Find out if Cookcell or Hexclad is most appropriate in this review: cookcell vs hexclad comparison .
Has anyone had issues with their electric gate during storms or power outages? How did you handle it? Automatic Swing Gates Rotherham
When someone writes an paragraph he/she retains the plan of
a user in his/her mind that how a user can know it. So that’s why this piece of writing is great.
Thanks!
Your point on hydration and skin health is key. My routine: botox Greenville
What are the best foods to eat while wearing braces, especially if you’re in Livingston? Teeth Retainers
https://92lotteryclub.com/