Ruby Hash delete()函数

delete()是一个Hash类方法，用于删除键值对，并返回键值等于键值的Hash值。

语法。Hash.delete()

参数：哈希数组

返回：键值等于被删除键值的哈希值。

例子 #1:

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

输出:

delete   a : 100

delete   b : 100

例子#2。

# Ruby code for delete  () method
  
# declaring Hash value
c = {"a" => 100, "c" => 300, "b" => 200}
  
puts "delete   c : #{c.delete("b") }\n\n"
  
puts "delete   c : #{c.delete("xy"){ |el| "#{el} not found" } }\n\n"

输出:

delete   c : 200

delete   c : xy not found