如何迭代具有最小属性的哈希和哈希数组

Question

I've got an array of hashes and I need to figure out which hash has the smallest height attributes. So given this array,

[{"height"=>130, "source"=>"http.facebook.com/tiny_pic.jpg", "width"=>173},    
 {"height"=>1230, "source"=>"http.facebook.com/giant_pic.jpg", "width"=>1273}] 

I want to return this

{"height"=>130, "source"=>"http.facebook.com/tiny_pic.jpg", "width"=>173}

What's the most efficient way to do this?

Answer 1

确保它只是一个数组，所以：

array_of_hashes.min_by {|h| h['height']}

Answer 2

使用min方法：

hash = array.min { |a,b| a['height'] <=> b['height'] }