红宝石 |哈希合并函数

Hash#merge()是一个 Hash 类方法，它结合了两个哈希数组及其内容。

Syntax: Hash.merge()

Parameter: Hash values

Return: combine two hash arrays

示例 #1：

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

输出 ：

Hash a merge form : {:a=>100, :b=>200, :c=>300}

Hash b merge form : {:a=>100, :c=>300, :b=>200}

Hash c merge form : {:a=>100, :b=>200}

示例 #2：

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

输出 ：

Hash a merge form : {"a"=>100, "b"=>200}

Hash b merge form : {"a"=>100, "c"=>300, "b"=>200}

Hash c merge form : {"a"=>100, "c"=>300, "b"=>200}