We're built different...

as the name of the tests imply, your solution has to be reusable, i.e. invoke() should behave correctly when called several times on the same Lazy object

yeah, i believe i'm talking about the same one just above. noone cares

I believe one of the test cases might be wrong. Test Reuse lazy
filterNumbers + filterRange + max function, 2nd one.
My function passes every one except for this one, here are the results
for each stage:
[Function: filterNumbers] arguments - [ 1, '3', [ 2 ], {}, 4, 2, 1, 8,
6, [], '7', -1, { v: 5 }, 4 ] result - [ 1, 4, 2, 1, 8, 6, -1, 4 ],
[Function: filterRange] arguments - [ 1, 3, 1, 4, 2, 1, 4, 2, 1, 8, 6,
-1, 4 ] result [ 1, 2, 1, 2, 1 ],
[Function: max] arguments - [ 1, 2, 1, 2, 1, 2, 1 ] result 2
Everything seems correct but for some reason the expected output in the last one is 1,
not 2. Might there be a mistake here?