var v = [1,2,++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"hi", "world", 5.5]
assert_equal(true, v.contains(5.5))
assert_equal(false, v.contains(0))||r v = [1,2,+++++++++++(++++++++++++++++++++++++-+++++!+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++tains(1, lt))
assert_equal(true, v.contains(2, `==`))  
