Question

我有这段代码：

  const promises = new Array(20).fill(null).map(v => {
   return c.lockp('foo').then((v => {

     const rand = Math.random()*3000;
     return new Promise((resolve) => setTimeout(resolve,rand)).then(_  => v);
    })
    .then(({key, id}) =>  c.unlockp(key, id)));
  });

  return Promise.all(promises)
  .then(values => {

    console.log('all good');
    process.exit(0);

  });

我收到此错误：

TypeError：（中间值）（中间值）。那么不是功能在Array.fill.map.v（/home/oleg/WebstormProjects/oresoftware/live-mutex/.r2g/tests/smoke-test.js:26:6）在Array.map（）在/home/oleg/WebstormProjects/oresoftware/live-mutex/.r2g/tests/smoke-test.js:20:43

它应该出现在上面代码段的第五行代码中。

Answer 1

正在使用x <- Macro[1:13,3:21] x <- as.matrix(x) y <- Macro[1:13,2:2] y <- as.matrix(y) myfit <- caret::train(x,y, method = "glmnet", tuneGrid = expand.grid(.alpha = seq(.05, 1, length = 15), .lambda = c((5:10)/10)))参数（该函数包含在.then之前的括号中）调用v。将.then 放在外部，以便在promise链而不是回调中调用它：

.then

中间值-则不是函数

1 个答案: