Array::Wrapper(T)

Wraps an Array object. The including type will behave as a read-only array, where objects returned by methods will be wrapped as well if the return type is the same as the original array.

class CustomArray(T)
  include ArrayWrapper(T)
end

arr = CustomArray.new([1, 2, 3, 4])
arr.size                  # => 4
arr[0]?                   # => 1
arr[6]?                   # => nil
arr.select(&.even?)       # => [2, 4]
arr.select(&.even?).class # => CustomArray(Int32)
arr.select!(&.even?)      # does not compile