Ruby | Queue new() function

Ruby | Queue shift() function

Last Updated : 07 Jan, 2020

The shift() is an inbuilt function in Ruby returns the element in the front of the queue and removes it from the queue.

Syntax: q_name.shift()

Parameters: The function does not takes any element.

Return Value: It returns the first element which is at the front of the queue and removes it from the queue.

Example 1:

#Ruby program for shift() function in Queue 
  
#Create a new QUEUE q1 
q1 = Queue.new
  
#push 5 
     q1.push(5) 
  
#push 6 
         q1.push(6) 
  
#Prints the top - most element and also shifts it 
             puts q1.shift 
  
                 puts q1.shift 

Output:

5
6

Example 2:

#Ruby program for shift function in Queue 
  
#Create a new QUEUE q1 
q1 = Queue.new
  
#push 12 
     q1.push(12) 
  
#push 21 
         q1.push(21) 
  
#Prints the top - most element and also shifts it 
             puts q1.shift 
  
                 puts q1.shift 

Output:

12
21

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

Ruby | Queue new() function

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