Allow methods to use hashes or not as arguments

destructure.rb

class Array

  def destructure(*arr)
    if size == 1 && first.is_a?(Hash)
      arr.map {|k| first[k] }
    else
      self
    end
  end

end

destructure_test.rb

require_relative 'destructure'
require 'minitest/autorun'

class DestructureTest < MiniTest::Unit::TestCase
  
  def test_can_pull_values_from_hash
    args = [{:a => 1, :b => 2, :c => 3}] 
    assert_equal [1, 2, 3], args.destructure(:a, :b, :c) 
  end
  
  def test_can_assign_positions_to_array
    args = [1, 2, 3]
    assert_equal [1, 2, 3], args.destructure(:a, :b, :c)
  end

end

# def test(*args)  
#   a, b, c = args.destructure(:a, :b, :c)
#   print a, b, c, "\n"
# end
# 
# test 1, 2, 3
# #=> 123
# test b: 2, c: 3, a: 1
# #=> 123