Ruby | Queue close() function

The close() is an inbuilt function in Ruby closes the queue permanently and does not allow any more push or pop operations in it. A closed queue cannot be re-opened. 

Syntax: q_name.close()

Parameters: The function does not takes any element.

Return Value: It closes the queue and does not returns anything.

Example 1: 

Ruby

#Ruby program for close() function in Queue

#Create a new QUEUE q1
q1 = Queue.new

#push 5
     q1.push(5)

#push 6
         q1.push(6)

#Prints the element
             puts q1.pop

#Closed the queue
                 q1.close()

#check if closed or not
                     puts q1.closed
    ?

Output:  

5
true

Example 2: 

Ruby

#Ruby program for close() function in Queue

#Create a new QUEUE q1
q1 = Queue.new

#push 5
     q1.push(12)

#Closed the queue
         q1.close()

#check if closed or not
             puts q1.closed
    ?

Output: 

true

Reference: https://devdocs.io/ruby~2.5/queue#method-i-close