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
Last Updated :
07 Jan, 2020
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