Type Parameters

TypeScript offers an alternative way to declare arrays using type parameter syntax: Array<T>, which, for now, just know that it's basically the same as the "normal" T[] syntax. You'll see both versions in the wild.

These function declarations are the same:

// Using bracket notation
function assignLightsaberColors(name: string, colors: string[]): void {
  // ...
}
// Using generic type parameter syntax
function assignLightsaberColors(name: string, colors: Array<string>): void {
  // ...
}

You can also use either syntax when declaring variables:

const colors: string[] = [
  "blue",
  "green",
  "purple",
  "red",
  "orange",
  "white",
  "darksaber",
];
const midichlorianCounts: Array<number> = [
  1000, 5000, 12000, 20000, 27000, 40000,
];

Later, when we talk about generics, it will make a bit more sense why you might use Array<T> over T[] - and the answer is mostly because it will feel consistent with other generic types.