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| // fibonacci.js | |
| class FibonacciSequence { | |
| [Symbol.iterator]() { | |
| let a = 0, b = 1; | |
| return { | |
| next() { | |
| let rval = { value: b, done: false }; | |
| b += a; | |
| a = rval.value; | |
| return rval; | |
| } | |
| }; | |
| } | |
| } | |
| const fib = new FibonacciSequence(); | |
| let i = 0; | |
| for(let n of fib) { | |
| console.log(n); | |
| if(++i > 9) | |
| break; | |
| } |
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