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| const data = { | |
| items: ["A", "B", "C"], | |
| pointerIndex: 0, | |
| next() { | |
| if (this.pointerIndex < this.items.length) // if not done | |
| return { value: this.items[this.pointerIndex++], done: false } | |
| else // if done | |
| return { value: undefined, done: true }; | |
| } | |
| } |
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