Filtering

This brings me to another insight: I need to use objects as array members when these objects have enough distinct data points to merit the use of an object. Otherwise, as with the example of a six-pack of beers, there's not really much distinction between any two items in that six-pack. Put differently, the reason to filter an array of objects in the first place, is essentially to find a sub-group of objects that share a specific property, which makes them different enough from all the other objects in this collection (array) of objects, to merit a use of a filter.

Now you should understand, at a conceptual level, why you might want to filter objects in an array, which brings me to explaining how you would go about doing it.

There are several built-in array methods that allow you to filter an array of items.

Using the array of users, here's how I might filter them by country:

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const users = [

  { name: "Anna", email: "ana@ana.com", country: "United States" },

  { name: "Suzan", email: "suzan@suzan.com", country: "United Kingdom" },

  { name: "Barbara", email: "barb@barbara.com", country: "United States" },

];

const americans = users.filter((person) => person.country == "United States");

const brits = users.filter((person) => person.country == "United Kingdom");

console.log(

  "In our list of users, the following come from the USA:",

  americans

);

console.log(

  "In our list of users, here are those that come from the UK:",

  brits

);