Rediscovering JavaScript: ES6, ES7 & ES8/

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Removing Noise With Generators

Removing Noise With Generators

Learn how to create and call generators with examples.

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A generator, as the name indicates, generates values.

📍 For a function to serve as a generator, its name should lead with a * and its body should have one or more yield calls.

Creating a generator

Let’s convert the iterator method to a simple generator.

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'use strict';
class CardDeck {
  constructor() {
    this.suitShapes = ['Clubs', 'Diamonds', 'Hearts', 'Spaces'];
  }
  //START:METHOD
  *suits() {
    for(const color of this.suitShapes) {
      yield color;
    }
  }
  //END:METHOD
}

  • We replaced the ...