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 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 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