The <<() is an inbuilt function in Ruby inserts the element in the queue.
Syntax: q_name << element
Parameters: The function takes the element to be inserted into the queue.
Return Value: It inserts the element into the queue.
Example 1:
#Ruby program for << function in Queue #Create a new QUEUE q1 q1 = Queue. new
#push 5 q1
<< 5
#push 6 q1
<< 6
#Prints the element puts q1.pop
puts q1.pop
|
Output:
5 6
Example 2:
#Ruby program for << function in Queue #Create a new QUEUE q1 q1 = Queue. new
#push 10 q1
<< 10
#push 12 q1
<< 12
#Prints the element puts q1.pop
#Again pushes 13 q1
<< 13
#Prints the element puts q1.pop
#Prints the element puts q1.pop
|
Output:
10 12 13
Reference: https://devdocs.io/ruby~2.5/queue#method-i-3C-3C