Closures

[katjad]

Some references I mentioned today:

YDKJS Chapter 2 https://github.com/getify/You-Dont-Know-JS/blob/master/scope%20&%20closures/ch5.md FunFunFunction video (as mentioned here before, there's a whole series about functional programming) https://www.youtube.com/watch?v=CQqwU2Ixu-U About the module pattern: https://toddmotto.com/mastering-the-module-pattern/

A few things about closures:

• For closure to happen, you need a function inside a function
• Functions are passed by reference, not by value
• Functions can refer to variables defined in outer scopes
• Closures can outlive the function that creates them
• Closures are good for creating private variables and methods, the module pattern, and for composing functions from other functions