Tuple functions

Reference documentation for Expressif functions in the tuple scope.

Name	Overview
apply	Evaluates an expression with the input tuple as its positional context.
arity	Returns the number of positional elements in the input tuple.
extend	Returns a new tuple with all positions from another tuple appended.
pick	Returns a tuple containing selected positions in the requested order.
swap	Returns a tuple with two positions exchanged, defaulting to the first and last positions.
tuple-at	Returns the tuple field at the specified zero-based position. Returns null when the input is not a tuple or the position is out of range.
tuple-first	Returns the first field of a tuple. Returns null when the input is not a tuple.
tuple-second	Returns the second field of a tuple. Returns null when the input is not a tuple.