Map.has() is true/false

Question

Why doesn’t this output true or false? Instead it returns 1 for true and I guess -1 for false. What is the determination for 1 or true as the output?

Answer 1

Looks to me like it is a boolean value :/

Answer 2

If you would provide us your code, we might be able to help. Maybe you turned it into a number at some point, but we will never know

Answer 3

I didnt put in code because this is directly from the lessons...I thought it would link back to it.
Here is the code Im talking about:
let map = new Map();

map.set('k1', 'v1').set('k2', 'v2');

console.log(map.get('k1')); // v1

console.log(map.has('k2')); // true

for (let kv of map.entries())
console.log(kv[0] + " : " + kv[1]);