Question

postPersonalDetails(pdData){
let options : RequestOptionsArgs;
let token:string;
let id:string;
this.getToken().then((val) => {
  token = val;
  console.log("I am in token func"+token);
});
this.storage.get('userID').then((val) => {
  id = val;
  console.log(val);
});
console.log("I amhere"+token+id);

我在第一个consoleLog和第二个Consolelog中获取数据

由于异步性质，第三个控制台日志首先打印我得到令牌是未定义的，用户ID是未定义的这样做的正确方法是什么？

Answer 1

角度设置附带core-js和Promise的polyfill。您可以将承诺与Promise.all（see MDN with a detailed method explanation）合并，然后在两个承诺得到解决后继续。

Promise.all([
  promise1, promise2, ...
])

请记住，如果其中一个合并的承诺被拒绝，则Promise.all会拒绝。

Answer 2

以下是有关PerfectPixel建议的更多细节。

class MLP(chainer.Chain):

    def __init__(self, n_units, n_out):
        super(MLP, self).__init__()
        with self.init_scope():
            # input size of each layer will be inferred when omitted
            self.l1 = L.Linear(n_units)  # n_in -> n_units
            self.l2 = L.Linear(n_units)  # n_units -> n_units
            self.l3 = L.Linear(n_out)  # n_units -> n_out

    def __call__(self, x):
        h1 = F.relu(self.l1(x))
        h2 = F.relu(self.l2(h1))
        return self.l3(h2)

model = MLP(args.unit, 10)
classifier_model = L.Classifier(model)
if args.gpu >= 0:
    chainer.cuda.get_device_from_id(args.gpu).use()  # Make a specified GPU current
    classifier_model.to_gpu()  # Copy the model to the GPU

# Setup an optimizer
optimizer = chainer.optimizers.AdaGrad()
optimizer.setup(classifier_model)

# --- After `optimizer.setup()`, you can modify `hyperparam` of each parameter ---

# 1. Change `update_rule` for specific parameter
#    `l1` is `Linear` link, which has parameter `W` and `b`
classifier_model.predictor.l1.W.update_rule.hyperparam.lr = 0.01

# 2. Change `update_rule` for all parameters (W & b) of one link
for param in classifier_model.predictor.l2.params():
    param.update_rule.hyperparam.lr = 0.01

# --- You can setup trainer module to train the model in the following...
...

这是一个更常见的工作示例。（有关副作用的详细信息，请参阅Bergi的评论。）

＆＃13;

const promise1 = this.getToken().then((val) => {
  console.log("I am in token func"+val);
  return val;
});

const promise2 = this.storage.get('userID').then((val) => {
  console.log(val);
  return val;
});

Promise
  .all([promise1, promise2])
  .then((results) => {
    const [ token, id ] = results;
    console.log("I am here"+token+id);
  });
}

＆＃13;

异步打字稿到同步打字稿

2 个答案: