Ruby | Queue clear() function

The clear() is an inbuilt function in Ruby clears the queue and makes it size to be zero again. We can re-insert objects again to it.

Syntax: q_name.clear()

Parameters: The function does not takes any element.

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

Example 1:

#Ruby program for clear() 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

#Clears the queue
                 q1.clear()

#Prints the size
                     puts q1.length

Output:

5
0

Example 2:

#Ruby program for clear() function in Queue

#Create a new QUEUE q1
q1 = Queue.new

#push 5
     q1.push(12)

#Closed the queue
         q1.clear()

#check if closed or not
             puts q1.size

Output:

0

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