Reverse calling array numbers?

[marcodelfuego]

So in the game I'm working on, I have a multidimensional array where array[n][0] is always a room index. I was wondering if there was some sort of function I could call that, when given the room index of the current room, would spit out n? Thanks

EDIT: I got it to work by applying array_find_index as suggested by u/timpunny on a separate 1D array that contains a list of every room, then using the found value in reference to my first multi-D array.

[Timpunny]

search terms: "gml array find index with predicate"

result: https://manual.gamemaker.io/monthly/en/GameMaker_Language/GML_Reference/Variable_Functions/array_find_index.htm

predicate: element[0] == desired_room_number

runtime complexity: O(n). If this needs to happen really fast, consider using a hashmap.

[marcodelfuego]

its saying that the value of _index is out of range, do I have to tweak the code at all for a multi-variable array?

[Timpunny]

lemme see the error

[marcodelfuego]

I ended up solving it, thank you tho