a = [ "a", "b", "c" ]
a.push("d", "e", "f")
#=> ["a", "b", "c", "d", "e", "f"]
a = [1, 2, 3]
a += [4, 5]
#=> [1, 2, 3, 4, 5]
a << 6
#=> [1, 2, 3, 4, 5, 6]somearray = ["some", "thing"]
anotherarray = ["another", "thing"]
somearray + anotherarray # => ["some", "thing", "another", "thing"]
somearray.concat anotherarray # => ["some", "thing", "another", "thing"]
somearray.push(anotherarray).flatten # => ["some", "thing", "another", "thing"]
somearray.push *anotherarray # => ["another", "thing", "another", "thing"]