I need to create a method named first_and_last. It should use one argument, an Array, and return a new Array with only the first and last objects of the argument.
Here is what I have so far, but the method seems to ignore the initial argument and just create a new array.
arr = Array.new
arr = ["a", "b", "c"]
You can use the
values_at() method to get the first and last elements in an array like this:
def first_and_last(input_array) input_array.values_at(0,-1) end
Depending on what behavior you're looking for, it might not work on arrays with 1 or 0 elements. You can read more about the method here.