Ruby | Queue empty? function

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:

#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:

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

Ruby | Queue empty? function

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