Write a function createCounter
. It should accept an initial integer init
. It should return an object with three functions.
The three functions are:
increment()
increases the current value by 1 and then returns it.decrement()
reduces the current value by 1 and then returns it.reset()
sets the current value toinit
and then returns it.
Example 1:
Input: init = 5, calls = ["increment","reset","decrement"] Output: [6,5,4] Explanation: const counter = createCounter(5); counter.increment(); // 6 counter.reset(); // 5 counter.decrement(); // 4
Example 2:
Input: init = 0, calls = ["increment","increment","decrement","reset","reset"] Output: [1,2,1,0,0] Explanation: const counter = createCounter(0); counter.increment(); // 1 counter.increment(); // 2 counter.decrement(); // 1 counter.reset(); // 0 counter.reset(); // 0
/**
* @param {integer} init
* @return { increment: Function, decrement: Function, reset: Function }
*/
var createCounter = function(init) {
let count = init;
return {
increment: function(){
return ++count;
},
decrement: function(){
return --count;
},
reset: function(){
count = init;
return count;
}
};
};
const counter = createCounter(5)
counter.increment()
counter.reset();
counter.decrement();
/**
* const counter = createCounter(5)
* counter.increment(); // 6
* counter.reset(); // 5
* counter.decrement(); // 4
*/