Ruby | SizedQueue close() function

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

Syntax: sq_name.close()

Parameters: The function does not takes any element.

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

Example 1: 

Ruby

#Ruby program for close() function in SizedQueue

#Create a new SizedQueue q1
q1 = SizedQueue.new(2)

#push 5
         q1.push(5)

#push 6
             q1.push(6)

#Prints the element
                 puts q1.pop

#Closed the SizedQueue
                     q1.close()

#check if closed or not
                         puts q1.closed
    ?

Output: 

5
true

Example 2: 

Ruby

#Ruby program for close() function in SizedQueue

#Create a new SizedQueue q1
q1 = SizedQueue.new(1)

#push 12
         q1.push(12)

#Closed the SizedQueue
             q1.close()

#check if closed or not
                 puts q1.closed
    ?

Output: 

true

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