我试着:
somearray = ["some", "thing"]
anotherarray = ["another", "thing"]
somearray.push(anotherarray.flatten!)
我预期的
["some", "thing", "another", "thing"]
但有
["some", "thing", nil]
当前回答
我很惊讶没有人提到reduce，当你有一个数组的数组时，它工作得很好:
lists = [["a", "b"], ["c", "d"]]
flatlist = lists.reduce(:+) # ["a", "b", "c", "d"]
其他回答
最简洁的方法是使用array# concat方法;它不会创建一个新数组(不像array# +会做同样的事情，但创建一个新数组)。
直接从文档(http://www.ruby-doc.org/core-1.9.3/Array.html#method-i-concat):
concat (other_ary) 将other_ary的元素追加到self。
So
[1,2].concat([3,4]) #=> [1,2,3,4]
如果作为参数传入多维数组，array# concat将不会平展多维数组。你需要单独处理:
arr= [3,[4,5]]
arr= arr.flatten #=> [3,4,5]
[1,2].concat(arr) #=> [1,2,3,4,5]
最后，您可以使用我们的corelib gem (https://github.com/corlewsolutions/corelib)，它为Ruby核心类添加了有用的帮助程序。特别地，我们有一个array# add_all方法，它将在执行concat之前自动将多维数组平展。
我很惊讶没有人提到reduce，当你有一个数组的数组时，它工作得很好:
lists = [["a", "b"], ["c", "d"]]
flatlist = lists.reduce(:+) # ["a", "b", "c", "d"]
只是另一种方法。
[somearray, anotherarray].flatten
=> ["some", "thing", "another", "thing"]
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"]
Somearray = ["some"， "thing"]
Anotherarray = ["another"， "thing"]
Somearray + anotherarray
