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'use strict'; const p = console.log; // ジェネレータはアロー関数にできないとのこと const gfn = function* (from, to) { while (from <= to) { yield from++; } }; const mainGenerator = () => { const g = gfn(0, 4); const iterator1 = g[Symbol.iterator](); const iterator2 = g[Symbol.iterator](); p(iterator1 === g); // true p(iterator2 === g); // true p(iterator1.next()); // { value: 0, done: false } p(iterator1.next()); // { value: 1, done: false } p(iterator1.next()); // { value: 2, done: false } p(iterator1.next()); // { value: 3, done: false } p(iterator1.next()); // { value: 4, done: false } p(iterator1.next()); // { value: undefined, done: true } p(iterator2.next()); // { value: undefined, done: true } p(iterator2.next()); // { value: undefined, done: true } p(iterator2.next()); // { value: undefined, done: true } p(iterator2.next()); // { value: undefined, done: true } p(iterator2.next()); // { value: undefined, done: true } p(iterator2.next()); // { value: undefined, done: true } }; // module.exports = mainGenerator; mainGenerator(); |
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true true { value: 0, done: false } { value: 1, done: false } { value: 2, done: false } { value: 3, done: false } { value: 4, done: false } { value: undefined, done: true } { value: undefined, done: true } { value: undefined, done: true } { value: undefined, done: true } { value: undefined, done: true } { value: undefined, done: true } { value: undefined, done: true } |
