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56 lines (49 loc) · 1.42 KB
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// ==== Challenge 1: Write your own closure ====
// Write a simple closure of your own creation. Keep it simple!
const hello = () => {
const first = "hello";
function world() {
const second = "world";
console.log(`${first} ${second}`);
}
world();
};
hello();
// ==== Challenge 2: Create a counter function ====
const counter = () => {
// Return a function that when invoked increments and returns a counter variable.
let numberCount = 0;
function nestedFunction() {
numberCount++;
console.log(numberCount);
return numberCount;
}
nestedFunction();
nestedFunction();
};
counter();
// Example usage: const newCounter = counter();
// newCounter(); // 1
// newCounter(); // 2
/* 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;
function increment(){
counter++;
console.log(counter);
}
function decrement(){
counter--;
console.log(counter);
}
increment();
increment();
increment();
increment();
decrement();
};
counterFactory()