“Other languages” have this function also seem to be the same languages where every function is arity 1 (what you’d think of as an arity 3 function is just an arity 1 that returns a function that is arity 1 that returns a function that is arity 1 that return the result), and no language on the BEAM can work quite like that without a huge amount of preprocessing to ‘pack’ arity’s together if you want to work with the rest of the beam.
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