ruby - 嵌套数组删除 nil

Question

我有这样的嵌套数组:

['foo', [nil], 'baz', ['bar'], nil, ['zoo']]

如何优雅地删除 nil 但保留空数组？*我希望看到:

['foo', [], 'baz', ['bar'], ['zoo']]

有高手帮忙吗？
*一次迭代

Answer 1

尝试代码:

array = ['foo', [nil], 'baz', ['bar'], nil, ['zoo']]
array.map! {|v| v.is_a?( Array ) && v.compact || v }.compact
# => ["foo", [], "baz", ["bar"], ["zoo"]] 

或更灵活:

array.map! {|v| v.respond_to?( :compact ) && v.compact || v }.compact
# => ["foo", [], "baz", ["bar"], ["zoo"]] 

或陷阱:

array.map! {|v| v.compact rescue v }.compact
# => ["foo", [], "baz", ["bar"], ["zoo"]]