如何用修正因子创建哈希差异？ [英] How do I create a diff of hashes with a correction factor?

问题描述

  h_array = [
 {：name => John，：age => 23，：eye_color => blue}，
 {：name => John，：age => 22，：eye_color => green}，
 {：name => John，：age => 22，：eye_color => black} 
] 
 
 get_diff（h_array，correct_factor = 2）
＃应该返回[{：eye_color => blue}，{：eye_color => green}，{：eye_color => black}] 
 
 get_diff（h_array，correct_factor = 3）
＃应该返回
＃[[{：age => 23}，{：年龄=> 22}，{：年龄=> 22}]，
＃[{：eye_color => blue}，{：eye_color => green}，{：eye_color => black}]] 
  

我想区分 h_array 。它看起来像递归调用/方法，因为 h_array 可以具有多个哈希，但具有相同数量的键和值。我如何实现 get_diff 方法？

解决方案

  def get_diff h_array，correct_factor 
 h_array.first.keys.reject {| k | 
 h_array.map {| h | H [k]的} sort.chunk {|即| Ë} {.MAP | _，E | e.size} .max> = correct_factor 
} .map {| k | 
 h_array.map {| hash | hash.select {|键，_ | k == key}} 
} 
 end 
  

I want to compare hashes inside an array:

h_array = [
  {:name => "John", :age => 23, :eye_color => "blue"},
  {:name => "John", :age => 22, :eye_color => "green"},
  {:name => "John", :age => 22, :eye_color => "black"}
]

get_diff(h_array, correct_factor = 2)
# should return [{:eye_color => "blue"}, {:eye_color => "green"}, {:eye_color => "black"}]

get_diff(h_array, correct_factor = 3)
# should return 
# [[{:age => 23}, {:age => 22}, {:age => 22}], 
# [{:eye_color => "blue"}, {:eye_color => "green"}, {:eye_color => "black"}]]

I want to diff the hashes contained in the h_array. It looks like a recursive call/method because the h_array can have multiple hashes but with the same number of keys and values. How can I implement the get_diff method?

解决方案

def get_diff h_array, correct_factor
  h_array.first.keys.reject{|k|
    h_array.map{|h| h[k]}.sort.chunk{|e| e}.map{|_,e| e.size}.max >= correct_factor
  }.map{|k|
    h_array.map{|hash| hash.select{|key,_| k == key}}
  }
end

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