Generators

This repo

This repo contains the code for the chapter Generators, advanced iteration and others

The Goal

Read the chapter Generators, advanced iteration of JavaScript.info reproducing the examples and exercises.

Additionally:

1. Study and solve the exercise Groups in the book EloquentJS Chapter 6
2. Study an solve the Iterable groups extension of the exercise Groups in EloquentJS Chapter 6 making the Group class from the previous exercise iterable
3. Simplify the solution to making the Group class iterable using a generator instead of a plain iterator as suggested in Chapter 11 of the book Eloquent JS

How to declare a generator

Generators are created by generator functions

function* f( ... ) {
    ...
}

Only inside generators you can use the yield operator.

The caller code and the generator may exchange results via next/yield calls.

Generators are great for making iterable objects.

Async generators are used to read streams of asynchronously generated data (e.g paginated fetches over a network) in for await ... of loops.

Generator.prototype.next()

The next() method returns an object with two properties done and value. You can also provide a parameter to the next method to send a value to the generator.

• Generator.prototype.next()

Generator.prototype.throw()

The throw() method resumes the execution of a generator by throwing an error into it and returns an object with two properties done and value.

• Generator.prototype.throw()