es6-generator

What are Generators?

Generators are functions that can generate multiple values on a per-request basis and can suspend their execution between requests.

What does it do?

We can run some code and return a value and go right back into the function at the same place you left it.

Iterations with generators

function* cars() {
    yield 'Focus';
    yield 'Fusion';
    yield 'F150';
    yield 'F250';
    yield 'EXPLORER';
}

const gen = cars();
gen.next(); //=> { "value": "Focus", "done":false }
gen.next(); //=> { "value": "Fusion", "done":false }
gen.next(); //=> { "value": "F150", "done":false }
gen.next(); //=> { "value": "F250", "done":false }
gen.next(); //=> { "value": "EXPLORER", "done":false }
gen.next(); //=> { "done":true }

Why to use?

Works perfectly with for of loops :)

You can use it to do async functions...

for (let car of cars()) {
    console.log(car);
}

Generator delegation

Please, look at the delegation.js file.

Generator with Symbol.iterator

Please, look at the symbol.js file.

How to run

node index.js
and
node cars.js
and
node delegation.js
and
node symbol.js