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
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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
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Output:
0
Reference: https://devdocs.io/ruby~2.5/queue#method-i-clear