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:
Smart note on humidification. heating contractors near me added a bypass humidifier—comfort improved instantly.
Very informative post that’s sparked interest in getting our roof checked by **the experts at **###ANYKEYWORD*** Commercial roofing
อยากได้คำแนะนำเกี่ยวกับการดูแลรักษาไฟหน้ารถ LED ครับ ไฟหน้า
Этот текст содержит различную информацию, которая, возможно, покажется любопытной, но в целом не меняет восприятия привычных вещей. Предлагаем просто получить удовольствие от чтения, не ожидая особой пользы.
Вот – oxycodone
Very good blog you have here but I was curious about if you knew of any community forums that cover the same topics
talked about here? I’d really like to be a part of online community where I can get feed-back
from other knowledgeable individuals that share the same interest.
If you have any suggestions, please let me know. Thanks!
Headaches can be tricky, but cervical adjustments helped mine. Consider a Chiropractor in Thousand Oaks; I had success with Thousand Oaks Primary Care .