Question

复发发电机/自动取用器} IteratorClass{ 如下: 我发现了一个双向树木和复发的发电机/发电机例子,但没有文件或实例来支持我下面的做法,我很想知道,我是否需要做一些不同的事情。我先测试了辛迪加和yn,看来是罚款。然而,Im没有执行<代码>next(>)的功能,并且想知道Im是否做过错,因为大多数例子,I ve 看到采用了生成器Next(。

Sync Plant/Iterator Level

class IteratorClass {
  constructor(obj) {
    this._obj = obj;
  }

  * [Symbol.iterator]() {
    for (const [key, value] of Object.entries(this._obj)) {
      /** remove code for brevity sake */

      /** type has childNode then yield to new instance of self */
      if (!value.hasChildNodes()) {
        yield* new IteratorClass(value)
      }

      yield type
    }
  }
}

<>Sync Iteration

const syncGenerator = new IteratorClass(obj)

for (const value of syncGenerator) {
    console.log( Yield value  :  , value)
}

http://www.ohchr.org。

class AsyncIteratorClass {
    /** remove code for brevity sake */

  async * [Symbol.asyncIterator]() {
    /** remove code for brevity sake, but identical implementation for this example */
    }
  }
}

<<>strong>Async Iteration

const asyncGenerator = new AsyncIteratorClass(obj)

async function init() {
  for await (const value of asyncGenerator) {
    console.log( Yield value  :  , value)
  }
}

init()

Answer 1

您在通过该名录时使用<代码>next()。反对<>for...of和Object.entries(......)。如果您正在寻找文件,你可以看到:

<>Iteration protocol DN >>

<>代码>

接受零或一论点并退回符合<代码>的反对功能(见下文)。如果在使用散装语文特征(例如<>条码/代码>)时,使用代号(例如<条码>的<>代码>),则将“)。

Generator | MDN

function* generator() {
  yield 1;
  yield 2;
  yield 3;
}

const gen = generator(); // "Generator { }"

console.log(gen.next().value); // 1
console.log(gen.next().value); // 2
console.log(gen.next().value); // 3

Yield* | MDN

The yield* expression iterates over the operand and yields each value returned by it. It delegates iteration of the current generator to an underlying iterator — which we will refer to as "generator" and "iterator", respectively. yield* first gets the iterator from the operand by calling the latter s @@iterator method. Then, each time the <>代码> method of the generator is called, yield* calls the iterator s <>代码> method, passing the argument received by the generator s <>代码> method (always undefined for the first call), and yielding the same result object as what s returned from the iterator s <>代码> method. If the iterator result has done: true, then the yield* expression stops executing and returns the value of that result.

Yield | MDN

A yield expression. In this case, the generator pauses, and the <>代码> method return an iterator result object with two properties: value and done. The value property is the value of the expression after the yield operator, and done is false, indicating that the generator function has not fully completed.

友情链接