Kata

It's an implicit guess as to what kind of keys would constitute as a number.

About the You must not change the value given in input this is impicitly tested. If the user modifies the array, the test will fail, same for the object.

Ehm, actually, no, that's not how it works.

You must not change the value given in input.

This is not tested.

Also, the random tests somehow (all, both object and array!) accept undefined as a correct answer, and are vulnerable to input modification.

It may be worth noting that since object keys are strings, a type conversion is needed to return an array with the Number value of a given key.

Basically, the input object {'1':5} for objectToArray is expected to return an array[1,1,1,1,1], and not ['1','1','1','1','1'].

Error in the instructions:

objectToArray({2:5, 9:1}) => [2, 2, 2, 2, 2, 99]

It should read:

objectToArray({2:5, 9:1}) => [2, 2, 2, 2, 2, 9]

An error in the test cases prevents a valid solution:

var obj = {none:0, nada:0, rien: 0};
Test.assertSimilar(objectToArray(arr),[]);

It should read:

var obj = {none:0, nada:0, rien: 0};
Test.assertSimilar(objectToArray(obj),[]);