Even shorter and more readable

[drdla]

No description provided.

[skratchdot]

this pr will change the output of the function. if you call it with:

compact([1, 2, false, 45, undefined, 0])

existing code will return: [ 1, 2, 45, 0 ]
code from pr will return: [ 1, 2, 45 ]

i don't care (as I don't use this function), but it seems like a new test case should be added, because the 0 logic isn't being tested currently.

EDIT: the code from the PR seems to behave more like the documentation that states remove falsey values