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JS Closures

Learn what is a closure and gain +1 confidence. Areas of hurt:

  • closure

Requirements

  • web browser

Installation

git clone git@github.com:KaoruDev/mentoring-js-closures.git

Objective

Finish writing the function window.addBy(). It must return a function that adds the number received by the number first passed.

Examples

var addsByFive = window.addBy(5);

addsByFive(10); // returns 15
addsByFive(20); // returns 25
addsByFive(7); // returns 12

var addsBySeven = window.addBy(7);

addsBySeven(10); // returns 17
addsBySeven(20); // returns 27
addsByFive(10); // STILL returns 8

Hints

  • What is a closure? How can you create one?