get single hash key ruby

To get a single hash key in Ruby, you can use the keys method followed by the first method. Here is an explanation of each step:

1. keys method: The keys method is used to retrieve all the keys from a hash. It returns an array of all the keys in the hash.

2. first method: The first method is used to retrieve the first element from an array. Since the keys method returns an array of keys, we can use the first method to get the first key from the array.

By combining these two methods, you can easily get a single hash key in Ruby.