Ruby Hash flatten()函数

Hash#flatten()是一个Hash类方法，用于返回一维扁平化的哈希数组。

语法。Hash.flatten()

参数：哈希值

返回：一维扁平化的哈希数组

例子 #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]

例子 #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]