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Ruby | Queue clear() function
  • Last Updated : 07 Jan, 2020

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:



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#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:

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#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

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