Falsy Bouncer with => and Array of Falsy Values

JavaScript
1

I’ve created an array of the falsy values called array.

I want to make use of it instead of doing return arr.filter( (x) => x) or return arr.filter(Boolean).

Those are really concise methods, but I don’t understand them.

I’ve tried:

return arr.filter( (x) => !falsy.includes(x))

to no avail.

2

It doesn’t work like that. Falsy values have some interesting behaviours, for example NaN === NaN will always be false

Falsy values has this property that when evaluated as a Boolean, they are false. This is what you should use to pass this challenge

For example Boolean(NaN) returns false, same for all the others falsy values

3

Actually my solution did work. However, I messed up on the function call when I copied the contents over, and it was passing a string.

However, I now have a better grasp of why Boolean works.

Thank you.