红宝石 |哈希合并！函数

Hash#merge!() : merge!()是一个 Hash 类方法，它可以将给定的哈希数组的内容添加到另一个。如果没有给出块，则具有重复键的条目将被来自 other_hash 的值连续覆盖。

Syntax: Hash.merge!()

Parameter: Hash values

Return: add the content the given hash array to the other

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, :c=>300}

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}