To check if a hash is empty in Ruby, you can use the empty? method. This method returns a boolean value indicating whether the hash contains any elements.
We can check if a hash is empty in Ruby using the empty? method, which returns true if the hash contains no elements and false otherwise.
For example,
my_map
. In this example, the hash has string keys and integer values.empty?
method to check if the hash is empty. The empty?
method returns a boolean value indicating whether the hash contains any elements.puts
function.my_map = {}
# Check if the hash is empty using empty? method
is_empty = my_map.empty?
# Print the result
puts "Is the hash empty? #{is_empty}"
Is the hash empty? true
We can check if a non-empty hash is empty in Ruby using the empty? method, which returns false if the hash contains elements.
For example,
my_map
with some key-value pairs. In this example, the hash has string keys and integer values.empty?
method to check if the hash is empty. The empty?
method returns a boolean value indicating whether the hash contains any elements.puts
function.my_map = {
'one' => 1,
'two' => 2,
'three' => 3
}
# Check if the hash is empty using empty? method
is_empty = my_map.empty?
# Print the result
puts "Is the hash empty? #{is_empty}"
Is the hash empty? false
We can check if a hash is empty in Ruby after clearing its elements using the empty? method, which returns true if the hash contains no elements.
For example,
my_map
with some key-value pairs. In this example, the hash has string keys and integer values.clear
method to remove all elements from the hash, making it empty.empty?
method to check if the hash is empty after clearing. The empty?
method returns a boolean value indicating whether the hash contains any elements.puts
function.my_map = {
'one' => 1,
'two' => 2,
'three' => 3
}
# Clear the hash
my_map.clear
# Check if the hash is empty using empty? method
is_empty = my_map.empty?
# Print the result
puts "Is the hash empty? #{is_empty}"
Is the hash empty? true
In this tutorial, we learned How to Check if a Map is Empty in Ruby language with well detailed examples.