Irritable Iterator

irritable-iterator.js

function irritable() {
  let step = 0;
  return {
    next: function() {
      step++;
      if (step === 1) {
        return { value: '😠', done: false };
      }
      
      if (step === 2) {
        return { value: '😡', done: false };
      }
      
      if (step === 3) {
        return { value: '🤬', done: false };
      }
      
      return { value: undefined, done: true };
    }
  };
}

Array.prototype[Symbol.iterator] = irritable;