Why didn't I think of takeWhile, I used take instead.

There is a function for this, it is called take.

array.take(3) // take the first 3 elements
array.drop(3) // drop the last 3 elements

inputArray.take(inputArray.indexof(0)

That saves a lot of work! Well done

how does this work? I'm completely lost, where is the predicate? Are sets sufficient predicates?

You don't need interpose or apply.

(let [digitize (fn [n] (map #(Character/digit % 10) (str n))
      ...]
      ...)

with this you can even stop it from being a function an just express it directly

(let  [ns (map #(Character/digit % 10) (str n))
       sum (reduce + (map Math/pow ns ...))]
    ...)

Expected: equal to [ ]
Actual: [ [unsupported type], [unsupported type], [unsupported type], [unsupported type], [unsupported type], [unsupported type], [unsupported type], [unsupported type], [unsupported type], [unsupported type], [unsupported type], [unsupported type] ]

Actual error.

C++ tests are broken. Says "" expected to be [ ]. No input expected to be no output? Or something?? or is there some bug here? Find my working code below.

cannot read property sort of undefined
javascript.

i have entered no code and the test cases are failing. I put in a condition in the test for loop if(getPINs(pin)) then run the test, still doesn't work

Tests broken. 6 === 6 but the tests suggest that 6 > 6 or that 2736 > 2763. Please take down this kata or fix it.