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57 lines (46 loc) · 1.43 KB
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// ==== Challenge 1: Write your own closure ====
// Write a simple closure of your own creation. Keep it simple!
function waterTemp(temp) {
let waterTemp = temp;
function waterOrIce() {
if (waterTemp <= 32) {
return 'Ice Ice Baby';
} else {
return 'what is bruce lee\'s favorite drink? WATAAA!'
}
}
return waterOrIce();
}
waterTemp(35); //?
// ==== Challenge 2: Create a counter function ====
let counter = 0;
const newCounter = () => {return counter++};
newCounter(); //?
newCounter(); //?
newCounter(); //?
// Return a function that when invoked increments and returns a counter variable.
// Example usage: const newCounter = counter();
// newCounter(); // 1
// newCounter(); // 2
// ==== Challenge 3: Create a counter function with an object that can increment and decrement ====
const counterFactory = () => {
let count = 0;
return {
increment() {
count++;
return count;
},
decrement() {
count--;
return count;
}
}
}
const newCounterFactory = counterFactory();
console.log(newCounterFactory.increment());
console.log(newCounterFactory.decrement()); //?
console.log(typeof newCounterFactory);
console.log(typeof 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.