小编vvv*_*vvv的帖子

我正在向 xarray 数据集添加变量，当我完成后，我想提取一个键列表，但我找不到这样做的方法。

d = xr.Dataset()
d['key1'] = [1, 2]
d['key2'] = [3, 4]

我想要的结果是

keylist = ['key1', 'key2']

我正在尝试使用subscribe方法从服务返回数据.

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';

@Injectable()
export class DevRequestService {
    constructor(private http: HttpClient){}
    getListOfAgencies() {
        return this.http.get('https://example.com/api/agency').subscribe(data => {
            return data;
          });
    }
}

零件:

ngOnInit(): void {
  console.log(this.devRequestService.getListOfAgencies());
}

下面是我在console.log中获得的输出,而不是返回带有值的对象:

Subscriber {closed: false, _parent: null, _parents: null, _subscriptions: Array(1), syncErrorValue: null, …}

如果用户单击浏览器中的后退按钮，如何显示自定义模式框。我已经有一个用于字段更改的模式框，但我不想使用 Prompt 的window.confirm.

我刚刚使用angular-cli安装了Angular 5:

在新的应用程序中,以下警告将在控制台中进行吐出.

不知道原因是什么？

h1.js:25 Warning: a promise was rejected with a non-error: [object String]
     at g (chrome-extension://bmnlcjabgnpnenekpadlanbbkooimhnj/h1.js:25:11246)
     at i.n._warn (chrome-extension://bmnlcjabgnpnenekpadlanbbkooimhnj/h1.js:25:15804)
     at i._rejectCallback (chrome-extension://bmnlcjabgnpnenekpadlanbbkooimhnj/h1.js:25:45600)
     at Function.i.reject.i.rejected (chrome-extension://bmnlcjabgnpnenekpadlanbbkooimhnj/h1.js:25:41344)
     at chrome-extension://bmnlcjabgnpnenekpadlanbbkooimhnj/h1.js:39:63684
     at i (chrome-extension://bmnlcjabgnpnenekpadlanbbkooimhnj/h1.js:25:72787)
     at i._settlePromiseFromHandler (chrome-extension://bmnlcjabgnpnenekpadlanbbkooimhnj/h1.js:25:46193)
     at i._settlePromise (chrome-extension://bmnlcjabgnpnenekpadlanbbkooimhnj/h1.js:25:46993)
     at i._settlePromise0 (chrome-extension://bmnlcjabgnpnenekpadlanbbkooimhnj/h1.js:25:47692)
     at i._settlePromises (chrome-extension://bmnlcjabgnpnenekpadlanbbkooimhnj/h1.js:25:49019)
     at o._drainQueue (chrome-extension://bmnlcjabgnpnenekpadlanbbkooimhnj/h1.js:25:2790)
     at o._drainQueues (chrome-extension://bmnlcjabgnpnenekpadlanbbkooimhnj/h1.js:25:2851)
     at drainQueues (chrome-extension://bmnlcjabgnpnenekpadlanbbkooimhnj/h1.js:25:984)
     at <anonymous>

我是anguar4的新手。我在我的项目中使用引导模式。当在模态之外单击时，模态将隐藏。这是我的代码

//在html中

<div bsModal #noticeModal="bs-modal" class="modal fade" tabindex="-1" role="dialog" 
    aria-labelledby="myLargeModalLabel"
    aria-hidden="true">

    <div class="modal-dialog modal-md">
        <div class="modal-content">
              Hello World
        </div>
    </div>
</div>

// 在 ts 代码中

@ViewChild('noticeModal') public noticeModal: ModalDirective;

ngAfterViewInit() {
   this.noticeModal.show();
};

我正在学习Vue并坚持使用嵌套路由器,我在路由中定义了一些子路由器,但是当我访问子路由时它仍然显示父组件,我的代码如下:

App.vue:

<template>
  <div id="app">
    <img src="./assets/logo.png">
    <router-link :to="{name: 'Home'}">Home</router-link>
    <router-link to="/cart">Cart</router-link>
    <router-link to="/admin">Admin</router-link>
    <router-link to="/admin/add">?Admin Add?</router-link>
    <router-link to="/admin/edit">Admin Edit</router-link>

    <router-view/>
  </div>
</template>

<script>
export default {
  name: 'app'
}
</script>

<style>
#app {
  font-family: 'Avenir', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>

路由器/ index.js:

import Vue from 'vue'
import Router from 'vue-router'
import Home from '@/components/pages/Home'
import Cart from '@/components/pages/Cart'
import Index from '@/components/pages/Admin/Index'
import Add from '@/components/pages/Admin/Add'
import Edit from …

正如标题所说，try/catch不会捕获抛出的异常。

这是我的代码：

public function edit($id)
{
    try {
        $this->permissions($id);   
        return $this->redirect(['edit/list']);

    } catch (Exception $e) {
        Yii::$app->session->setFlash('error', Yii::t('app', 'PERMISSIONS_NOT_FOUND'));
    }   
}

我正在尝试捕获方法中的异常permissions()。权限方法是：

private function persimssions($id)
{
    $permitted = false;

    if (!$permitted) {
        throw new ForbiddenHttpException(Yii::t('app', 'MODULE_NO_PERMISSIONS'));
    }
}

有人可以解释我有什么问题吗？谢谢你的帮助