a,
a, b
a, b = xs
()
(a,)
(a, b)
(a, b...)
Tuple{T, U, V}
NTuple{N, T}
Tuple{T, U, Vararg{V}}
Tuples have much better runtime performance than arrays for two reasons: their types are more precise, and their immutability allows them to be allocated on the stack instead of the heap. ...