Turns the argument into an array or an object.
to-array [ 0 1 2 ]
# --> [ 0 1 2 ] # (left intact)
to-array 123
# --> [ 123 ]
to-array { a: 'A', b: 'B' }
# --> [ [ 'a', 'A' ], [ 'b', 'B' ] ]
and
to-object [ 'a' 'A' 'b' 'B' 'c' 'C' ]
# --> { 'a': 'A', b: 'B', c: 'C' }