Create a function that takes:

1. An array of keys.
2. An array of values (same size).
3. true, if key and value should be swapped, else false.

The function returns the constructed hash. Empty arrays return an empty hash.

Examples

swap_h([1, 2, 3], ["one", "two", "three"], false)
➞ { 1 => "one", 2 => "two", 3 => "three" }

swap_h([1, 2, 3], ["one", "two", "three"], true)
➞ { "one" => 1, "two" => 2, "three" => 3 }

swap_h(["Paris", 3, 4.5], ["France", "is odd", "is half of 9"], true)
➞ { "France" => "Paris", "is odd" => 3, "is half of 9" => 4.5 }

Notes

• To make it simple, use only hashable (= immutable) keys.
• To make it simple, use only unique keys.