array to hash to one hash

To convert an array to a hash and then to a single hash in Ruby, you can follow these steps:

  1. Start with an array of arrays, where each sub-array contains two elements representing key-value pairs.

  2. Use the to_h method to convert the array of arrays into a hash.

  3. Use the merge method to combine the hashes into a single hash, where any duplicate keys will have their values overwritten by the rightmost hash.

Here's an example of the code:

array_of_arrays = [[1, "one"], [2, "two"], [3, "three"]]
hash_from_array = array_of_arrays.to_h
single_hash = hash_from_array.merge({4 => "four", 5 => "five"})

In this example, array_of_arrays is an array of arrays containing key-value pairs. We use the to_h method to convert it into a hash called hash_from_array. Then, we use the merge method to combine hash_from_array with another hash containing additional key-value pairs, resulting in a single hash called single_hash.