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
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