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// ==== Challenge 1: Write your own closure ====
// Write a simple closure of your own creation. Keep it simple!
function parent(){
const familyName = "Arthur"
function child(){
console.log(`child shares the same familyName ${familyName}`)
function grandchild(){
console.log(`grandchild shares the same familyName ${familyName}`)
}
grandchild();
}
child()
}
parent()
/* STRETCH PROBLEMS, Do not attempt until you have completed all previous tasks for today's project files */
// ==== Challenge 2: Create a counter function ====
const counter = () => {
// Return a function that when invoked increments and returns a counter variable.
let count = 0
const incrCounter = function (){
count= count+1
return count
}
return incrCounter
};
// Example usage: const newCounter = counter();
// newCounter(); // 1
// newCounter(); // 2
const newCounter = counter()
console.log(newCounter());
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{
incrCounter : function (){
count= count+1
return count
},
decrCounter : function (){
count= count-1
return count
}
}
};
const newCounter = counter()
console.log(newCounter.incrCounter())
console.log(newCounter.incrCounter())
console.log(newCounter.decrCounter())