Java 3

SUBMITTED BY: assassin413

DATE: Oct. 7, 2016, 2:07 p.m.

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function* idMaker(){
  var index = 0;
  while(index < 3)
    yield index++;
}

var gen = idMaker();

console.log(gen.next().value); // 0
console.log(gen.next().value); // 1
console.log(gen.next().value); // 2
console.log(gen.next().value); // undefined
// ...