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The pattern I see initially is the following:
(each # is the length of 1's & 0's alternating)
spiralize(5) === 5 -> 4 -> 4 -> 1 -> 2 -> 3 -> 6
spiralize(10) === 10 -> 9 -> 9 -> 1 -> 2 -> 6 -> 1 -> 1 -> 2 -> 1 -> 4 -> 1 -> 1 -> 1 -> ......
I don't understand the desired pattern, nor is the description helpful in any way.
Can someone please explain the desired pattern more clearly, either the author or someone else as a comment?
This kata has sample tests in which only one function is ever (un)subscribed to, but the behind-the-scenes tests imply that more than one function can be subscribed to at a given moment. Without understanding the structure of how multiple handlers are dealt with (held in an array/obj, constantly adding new 'fn' props, etc), it is impossible to guess how this must be implemented.
Please reword your description to account for this confusion regarding multiple/single handlers (the syntax of some sentences is also confusing).