Tuples

• are an array-like structure where each element represents some property of a record.
  • looks VERY similar to an array.
  • usually contains multiple properties to represent one single thing.
  • will usually contain multiple types.

Example: How do we use an object to present a 'drink'?

{
color -> brown
carbonated -> true
sugar -> 40
}

Lets take this object and represent it as an array [] [brown, true, 40] But we have alost a lot of information about the object. We would need to memorize the order of properties.

Ordering is critical - we need to know the order of properties.

const drink = {
  color: 'brown',
  carbonated: true,
  sugar: 40
};

type Drink = [string, boolean, number];

const pepsi: Drink = ['brown', true, 40];
const sprite: Drink = ['clear', true, 40];
const tea: Drink = ['brown', false, 0];

Why tuples?

• will not be used often.
• may be used with CSV file.

If we only looked at meaningful data like this, as a tuple...

const carSpecs: [number, number] = [400, 3354];

The numbers do not provide any meaning. Let's write these as an object instead.

const carStats = {
  horsepower: 400,
  weight: 3354
};

Since we have keys and values, it is clear what we are working with.