English-Spanish dictionary

Let’s sum up everything we learned about hashes, arrays, and their combinations. We will build a minimalistic English to Spanish dictionary application. You can guess from the title which data structure we’ll be using: hash.

The most important thing here is a database. We will not use sophisticated database management systems like Postgres or MySQL. Instead, we’ll keep data organized in the data structure in the computer’s memory. It could look like this:

dict = {
  'cat' => 'gato',
  'dog' => 'perro',
  'girl' => 'chica'
}

We can also use any other data structure. In our case, it will be a set of key-value pairs, where the key is an English word in string_ type, and the value is the translation, a Spanish word string type.

Hash data structure allows us to perform ...