红宝石 |哈希 flatten()函数

Hash#flatten()是一个 Hash 类方法，它返回一维展平散列数组。

Syntax: Hash.flatten()

Parameter: Hash values

Return: one-dimensional flattening hash array

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"

输出 ：

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"

输出 ：

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]