Ruby Hash merge!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数组中。如果没有给定块，键值重复的条目会被其他哈希的值连续覆盖。

语法。Hash.merge!()

参数：哈希值

返回：将给定的哈希数组的内容添加到另一个哈希数组中。

例子 #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}

例子 #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}