Ruby | Queue empty? function Last Updated : 07 Jan, 2020 Comments Improve Suggest changes Like Article Like Report 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: CPP #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: CPP #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 Comment More infoAdvertise with us Next Article Ruby | Queue empty? function gopaldave Follow Improve Article Tags : Ruby Ruby-Methods Ruby Collections Ruby Queue-class Similar Reads Ruby | Queue enq() function The enq() is an inbuilt function in Ruby inserts the element in the queue. Syntax: q_name.enq(element) Parameters: The function takes the element to be inserted into the queue. Return Value: It inserts the element into the queue. Example 1: CPP #Ruby program for enq() function in Queue #Create a new 1 min read Ruby | Queue deq() function The deq() is an inbuilt function in Ruby returns the element in the front of the queue and removes it from the queue. Syntax: q_name.deq() 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. 1 min read Ruby | Queue clear() function The clear() is an inbuilt function in Ruby clears the queue and makes it size to be zero again. We can re-insert objects again to it. Syntax: q_name.clear() Parameters: The function does not takes any element. Return Value: It clears the queue and does not returns anything. Example 1: CPP #Ruby prog 1 min read Ruby | Queue close() function The close() is an inbuilt function in Ruby closes the queue permanently and does not allow any more push or pop operations in it. A closed queue cannot be re-opened. Syntax: q_name.close() Parameters: The function does not takes any element. Return Value: It closes the queue and does not returns an 1 min read Ruby | Queue closed? function The closed? is an inbuilt function in Ruby checks if the queue is closed or not?. It returns a boolean value, which is true if the Queue is closed or it returns false. Syntax: q_name.closed? Parameters: The function does not takes any element. Return Value: It returns true if the queue is closed els 1 min read Ruby | Hash empty? function Hash#empty?() is a Hash class method which checks whether the Hash array has any key-value pair. Syntax: Hash.empty?()Parameter: Hash valuesReturn: true - if no key value pair otherwise return false Example #1 :  Ruby # Ruby code for Hash.empty?() method # declaring Hash value a = {a:100, b:200} # 1 min read Ruby | Queue new() function The new() is an inbuilt function in Ruby creates a new queue of the given name. Syntax: q_name = Queue.new() Parameters: The function does not takes any parameter. Return Value: It creates a new queue. Example 1: CPP #Ruby program for new () function in Queue #Create a new QUEUE q1 q1 = Queue.new #p 1 min read Ruby | Queue pop() function The pop() is an inbuilt function in Ruby returns the element in the front of the queue and removes it from the queue. Syntax: q_name.pop() 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. 1 min read Ruby | Set empty?() function The empty?() is an inbuilt method in Ruby returns true if the set is empty or it returns false. Syntax: s1.empty?() Parameters: The function does not takes any parameter. Return Value: It returns a boolean value. It returns true if the set is empty or it returns false. Example 1: Ruby # Ruby program 1 min read Ruby | Queue push() function The push() is an inbuilt function in Ruby inserts the element in the queue. Syntax: q_name.push(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 #Ruby program for push() function in Queue #Creat 1 min read Like