Step 86 - Learn Intermediate OOP by Building a Platformer Game

JavaScript
1

Okay, so here is what I typed out.

if (collisionDetectionRules.every(el => el === true)){
    player.velocity.y = 0;
    return;
  }

It looks okay, but I’m not entirely sure why it’s not accepting this.

It might be a subtle mistake I’m missing.

2

Hi @CasualWanderer20XX

Here is an article on the .every() method you may find helpful.

Happy coding

3

The primitive value true and “truthy” are not the same thing.

true is a literal value, if you compare another value to it, it must be that value.

The second is any value that when coerced to a boolean is true. You still can’t compare it to true unless you do the conversion.

const truthyValues = ["truthy value", true, true];

console.log(truthyValues.every((el) => el === true)); // false
console.log(truthyValues.every((el) => el)); // true
console.log(truthyValues.every((el) => Boolean(el) === true)); // true
console.log(truthyValues.every(Boolean)); // true

But the solution is hard-coded because of the regex that is used. You can skip forward to see the expected solution.

5

Thanks for the help. I just resolved it.