#2665: Counter II

Number 3 on the 30 Days Challenge is #2665, Counter II. This challenge is primarily an add-on to the last day, so be sure to check out my post on #2620 for concept detailing.

Process

The instructions given are pretty simple.

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 …

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