When should I use indexes, keys, and values?

• values should be used when you're dealing with an array or a dictionary where the key does not matter, and you want to manipulate values.

• indexes should be used when you're dealing with an array or a dictionary with non-duplicate values, and you want to rearrange the positions of each value. Some good usecases are:

  • Creating a list of all players
  • Displaying a history of chat messages
  • Toast notifications

• keys can be used for dictionaries, arrays, and especially sets (where the keys can be anything and the values are all set to true, or some other constant).