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38 lines (35 loc) · 1.07 KB
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// ==== Challenge 1: Write your own closure ====
// Write a simple closure of your own creation. Keep it simple!
function wait(message){
setTimeout(function timer(){
console.log(message)
},1000)
}
wait('Hay! this is Closure');
// ==== Challenge 2: Create a counter function ====
const counter = () => {
// Return a function that when invoked increments and returns a counter variable.
let count = 0;
return () => (count++)
};
// Example usage:
const newCounter = counter();
console.log(newCounter());
console.log(newCounter());
// ==== 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 count = 0;
return {
"increment" : function(){
count++;
return count;
},
"decrement" : function(){
count--;
return count;git
}
}
};