ProgramGuruTo clear all key-value pairs from a hash in Ruby, you can use the clear method. This method removes all elements from the hash, leaving it empty.
We can clear all key-value pairs from a hash in Ruby using the clear method, which removes all elements from the hash.
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 key-value pairs from the hash.size method to verify that the hash is empty.my_map = {
'one' => 1,
'two' => 2,
'three' => 3
}
# Clear all key-value pairs using clear method
my_map.clear
# Print the size of the hash
puts "Size of the hash after clearing: #{my_map.size}"Size of the hash after clearing: 0
We can use the clear method on an already empty hash in Ruby, and it will still leave the hash empty.
For example,
my_map. In this example, the hash has string keys and integer values.clear method to remove all key-value pairs from the hash, even though it is already empty.size method to verify that the hash is still empty.my_map = {}
# Clear the hash using clear method
my_map.clear
# Print the size of the hash
puts "Size of the hash after clearing: #{my_map.size}"Size of the hash after clearing: 0
We can insert key-value pairs into a hash and then clear all key-value pairs using the clear method.
For example,
my_map and inserting some key-value pairs into it. In this example, the hash has string keys and integer values.clear method to remove all key-value pairs from the hash.size method to verify that the hash is empty.my_map = {}
my_map['one'] = 1
my_map['two'] = 2
my_map['three'] = 3
# Clear all key-value pairs using clear method
my_map.clear
# Print the size of the hash
puts "Size of the hash after clearing: #{my_map.size}"Size of the hash after clearing: 0
In this tutorial, we learned How to Clear All Key-Value Pairs from a Map in Ruby language with well detailed examples.