Ruby Hash flatten()用法及代碼示例

Hash＃flatten()是一種Hash類方法，它返回一維展平哈希數組。

用法：Hash.flatten()

參數：散列值

返回：一維展平哈希數組

示例1:

# Ruby code for Hash.flatten() method 
  
# declaring Hash value 
a = {a:100, b:200} 
  
# declaring Hash value 
b = {a:100, c:[300, 45], b:200} 
  
# declaring Hash value 
c = {a:100} 
  
  
# flatten Value 
puts "Hash a flatten form : #{a.flatten()}\n\n"
  
puts "Hash b flatten form : #{b.flatten()}\n\n"
  
puts "Hash c flatten form : #{c.flatten()}\n\n"

輸出：

Hash a flatten form : [:a, 100, :b, 200]

Hash b flatten form : [:a, 100, :c, [300, 45], :b, 200]

Hash c flatten form : [:a, 100]

示例2:

# Ruby code for Hash.flatten() method 
  
# declaring Hash value 
a = { "a" => 100, "b" => 200 } 
  
# declaring Hash value 
b = {"a" => 100} 
  
# declaring Hash value 
c = {"a" => 100, "c" => [300, 200, 500], "b" => 200} 
  
  
# flatten Value 
puts "Hash a flatten form : #{a.flatten()}\n\n"
  
puts "Hash b flatten form : #{b.flatten()}\n\n"
  
puts "Hash c flatten form : #{c.flatten()}\n\n"

輸出：

Hash a flatten form : ["a", 100, "b", 200]

Hash b flatten form : ["a", 100]

Hash c flatten form : ["a", 100, "c", [300, 200, 500], "b", 200]

相關用法

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