Somearray = ["some"， "thing"]

Anotherarray = ["another"， "thing"]

Somearray + anotherarray

你可以使用+运算符!

irb(main):001:0> a = [1,2]
=> [1, 2]
irb(main):002:0> b = [3,4]
=> [3, 4]
irb(main):003:0> a + b
=> [1, 2, 3, 4]

你可以在这里阅读关于数组类的所有内容: http://ruby-doc.org/core/classes/Array.html

如果新数据可以是数组或标量，并且如果它是数组，则希望防止新数据嵌套，splat操作符非常棒!它为标量返回一个标量，为数组返回一个已解压的参数列表。

1.9.3-p551 :020 > a = [1, 2]
 => [1, 2] 
1.9.3-p551 :021 > b = [3, 4]
 => [3, 4] 
1.9.3-p551 :022 > c = 5
 => 5 
1.9.3-p551 :023 > a.object_id
 => 6617020 
1.9.3-p551 :024 > a.push *b
 => [1, 2, 3, 4] 
1.9.3-p551 :025 > a.object_id
 => 6617020 
1.9.3-p551 :026 > a.push *c
 => [1, 2, 3, 4, 5] 
1.9.3-p551 :027 > a.object_id
 => 6617020 

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"]
 

a = ["some", "thing"]
b = ["another", "thing"]

将b追加到a并将结果存储在a中:

a.push(*b)

or

a += b

在这两种情况下，a都变成:

["some", "thing", "another", "thing"]

但在前一种情况下，b的元素被追加到现有的a数组中，在后一种情况下，两个数组连接在一起，结果存储在a中。

a = ['a', 'b']
b = ['c', 'd']
arr = [a, b].flatten

这不会去除dups，但是

a|b

删除重复。