ProgramGuruTo get the size (number of key-value pairs) of a hash in Ruby, you can use the size method. This method returns the number of elements in the hash.
We can get the size of a hash in Ruby using the size method, which provides the number of key-value pairs in the hash.
For example,
my_map with some key-value pairs. In this example, the hash has string keys and integer values.size method to get the number of key-value pairs in the hash.map_size.puts function to verify the number of key-value pairs in the hash.my_map = {
'one' => 1,
'two' => 2,
'three' => 3
}
# Get the size of the hash
map_size = my_map.size
# Print the size
puts "Size of the hash: #{map_size}"Size of the hash: 3
We can also get the size of an empty hash in Ruby using the size method, which returns 0 when the hash is empty.
For example,
empty_map with string keys and integer values.size method to get the number of key-value pairs in the empty hash.empty_map_size.puts function to verify that the hash is empty.empty_map = {}
# Get the size of the empty hash
empty_map_size = empty_map.size
# Print the size
puts "Size of the empty hash: #{empty_map_size}"Size of the empty hash: 0
We can get the size of a hash in Ruby after adding elements using the size method, which provides the updated number of key-value pairs in the hash.
For example,
dynamic_map with string keys and integer values.size method to get the number of key-value pairs in the hash after adding elements.dynamic_map_size.puts function to verify the updated number of key-value pairs in the hash.dynamic_map = {}
# Add elements to the hash
dynamic_map['one'] = 1
dynamic_map['two'] = 2
dynamic_map['three'] = 3
# Get the size of the hash after adding elements
dynamic_map_size = dynamic_map.size
# Print the size
puts "Size of the hash after adding elements: #{dynamic_map_size}"Size of the hash after adding elements: 3
In this tutorial, we learned How to Get the Size (Number of Key-Value Pairs) of a Map in Ruby language with well detailed examples.