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// ==== Challenge 1: Write your own closure ====
// Write a simple closure of your own creation. Keep it simple!
// const parent = () => {
// let parentAge = 50;
// const child = () => {
// let childAage = 30;
// const grandchild = () => {
// let grandchildAge = 10;
// console.log(parentAge, childAage, grandchildAge);
// }
// grandchild();
// }
// child();
// }
// parent();
// ==== Challenge 2: Create a counter function ====
const counter = () => {
// Return a function that when invoked increments and returns a counter variable.
let num = 0;
return function inner() {
return ++num;
}
};
const newCounter = counter();
newCounter();
newCounter();
newCounter();
/* STRETCH PROBLEM, Do not attempt until you have completed all previous tasks for today's project files */
// ==== Challenge 3: Create a counter function with an object that can increment and decrement ====
const counterFactory = () => {
// Return an object that has two methods called `increment` and `decrement`.
// `increment` should increment a counter variable in closure scope and return it.
// `decrement` should decrement the counter variable and return it.
let counter = 0;
return innerObject = {
increment: function () {
return ++counter;
},
decrement: function () {
return --counter;
}
}
};
const valueStore = counterFactory();
valueStore.increment();
valueStore.decrement();