Ruby | Queue empty? function
The empty? is an inbuilt function in Ruby checks if the queue is empty or not?. It returns a boolean value, which is true if the Queue is empty or it returns false.
Syntax: q_name.empty?
Parameters: The function does not takes any element.
Return Value: It returns true if the queue is empty else it returns false.
Example 1:
#Ruby program for empty ? function in Queue #Create a new QUEUE q1 q1 = Queue. new #push 5 q1.push(5) #push 6 q1.push(6) #Checks if the queue is empty or not puts q1.empty ? #Clears the queue q1.clear() #Checks if the queue is empty or not puts q1.empty ? |
Output:
false true
Example 2:
#Ruby program for empty ? function in Queue #Create a new QUEUE q1 q1 = Queue. new #Checks if the queue is empty or not puts q1.empty ? |
Output:
true
Reference: https://devdocs.io/ruby~2.5/queue#method-i-clear
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