To convert a hash to an array of keys in Ruby, you can use the keys method. This method returns an array of all keys in the hash.
We can convert a hash to an array of keys in Ruby using the keys method, which provides an array of all keys in the hash.
For example,
my_hash
with some key-value pairs. In this example, the hash has string keys and integer values.keys
method to get an array of the keys in the hash.keys_array
.puts
function to verify the conversion.my_hash = {
'one' => 1,
'two' => 2,
'three' => 3
}
# Convert hash to an array of keys
keys_array = my_hash.keys
# Print the keys
puts "Keys: #{keys_array}"
Keys: ["one", "two", "three"]
We can also convert an empty hash to an array of keys in Ruby using the keys method, which returns an empty array when the hash is empty.
For example,
empty_hash
with string keys and integer values.keys
method to get an array of the keys in the empty hash.empty_keys_array
.puts
function to verify that the array is empty.empty_hash = {}
# Convert empty hash to an array of keys
empty_keys_array = empty_hash.keys
# Print the keys
puts "Keys: #{empty_keys_array}"
Keys: []
We can convert a hash to an array of keys in Ruby after adding elements using the keys method, which provides an updated array of all keys in the hash.
For example,
dynamic_hash
with string keys and integer values.keys
method to get an array of the keys in the hash after adding elements.dynamic_keys_array
.puts
function to verify the updated list of keys.dynamic_hash = {}
# Add elements to the hash
dynamic_hash['one'] = 1
dynamic_hash['two'] = 2
dynamic_hash['three'] = 3
# Convert hash to an array of keys after adding elements
dynamic_keys_array = dynamic_hash.keys
# Print the keys
puts "Keys: #{dynamic_keys_array}"
Keys: ["one", "two", "three"]
In this tutorial, we learned How to Convert a Map to an Array of Keys in Ruby language with well detailed examples.