小编Cal*_*Oki的帖子

我正在尝试创建一个扩展程序，在打开的 Jupyter Lab 笔记本的工具栏中添加一个自定义按钮，类似于这张照片中的“提交笔记本按钮......”。我如何实现这一目标？我尝试使用以下代码但它不起作用：

import { ToolbarButton } from "@jupyterlab/apputils";
import { DocumentRegistry } from "@jupyterlab/docregistry";
import { INotebookModel, NotebookPanel } from "@jupyterlab/notebook";
import { IDisposable } from "@lumino/disposable";

export class ButtonExtension implements DocumentRegistry.IWidgetExtension<NotebookPanel, INotebookModel> {

  createNew(panel: NotebookPanel, context: DocumentRegistry.IContext<INotebookModel>): IDisposable {
    // Create the toolbar button
    let mybutton = new ToolbarButton({
        label: 'My Button',
        onClick: () => alert('You did it!')
    });

    // Add the toolbar button to the notebook toolbar
    panel.toolbar.insertItem(10, 'mybutton', mybutton);

    // The ToolbarButton class implements `IDisposable`, …

我正在设置并尝试从 Laravel 应用程序中检索会话值。Vue Js 前端正在对 Laravel 端点进行 API 调用，该端点设置会话值。包含 Laravel 端点方法的控制器是：

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
Use Session;

use App\User;

class UserController extends Controller
{
    public function adduser(Request $request) {

        $user = User::where( 'sub', $request->sub )->first();

        if(!$user) {

            $user = new User();

            $user->nickname = $request->nickname;
            $user->name = $request->name;
            $user->sub = $request->sub;
            $user->api_token = $request->api_token;

            $user->save();

        }

        $user->api_token = $request->api_token;
        $user->save();

        return response()
            ->json([
                'done' => $user->api_token
            ]);

    }

    //The endpoint for this method is http://localhost:8000/api/set
    public function setSession(Request …

我正在使用Vue.js为CRUD应用程序创建警报组件。我希望在数据保存后将消息传递给另一个组件。当前，我正在尝试$router.push像这样传递此数据，this.$router.push({path: '/', query: {alert: 'Customer Added'}})然后在另一个组件中访问此数据。但是，这不能按预期工作，而是将数据传递到url中。

这是保存数据的组件Add.vue

<template>
<div class="add container">
<Alert v-if="alert" v-bind:message="alert" />
<h1 class="page-header">Add Customer</h1>
<form v-on:submit="addCustomer">
    <div class="well">
        <h4>Customer Info</h4>
        <div class="form-group">
            <label>First Name</label>
            <input type="text" class="form-control" placeholder="First Name" 
            v-model="customer.first_name">
        </div>
        <div class="form-group">
            <label>Last Name</label>
            <input type="text" class="form-control" placeholder="Last Name" 
            v-model="customer.last_name">
        </div>
    </div>
    <div class="well">
        <h4>Customer Contact</h4>
        <div class="form-group">
            <label>Email</label>
            <input type="text" class="form-control" placeholder="Email" v-model="customer.email">
        </div>
        <div class="form-group">
            <label>Phone</label>
            <input type="text" class="form-control" placeholder="Phone" v-model="customer.phone">
        </div>
    </div>

    <div class="well">
        <h4>Customer Location</h4>
        <div class="form-group"> …

我想在我的Vue.js 2应用程序中搜索或过滤3个字段的名字，姓氏和电子邮件。我知道Vue 2与Vue 1不同，它没有内置的过滤器方法，因此我创建了一个自定义方法，该方法只能通过一个字段进行过滤。如何将此扩展到多个字段？我已经尝试过类似的方法，filterBy(list, value1, value2, value3)但是它不起作用。

这是我的代码

<template>
<div class="customers container">
<input class="form-control" placeholder="Enter Last Name" v-
model="filterInput">
<br />
<table class="table table-striped">
  <thead>
    <tr>
      <th>First Name</th>
      <th>Last Name</th>
      <th>Email</th>
      <th></th>
    </tr>
  </thead>
  <tbody>
    <tr v-for="customer in filterBy(customers, filterInput)">
      <td>{{customer.first_name}}</td>
      <td>{{customer.last_name}}</td>
      <td>{{customer.email}}</td>
      <td><router-link class="btn btn-default" v-bind:to="'/customer/'+customer.id">View</router-link></td></tr>
  </tbody>
</table>

</div>
</template>

<script>

export default {
name: 'customers',
data () {
return {

  customers: [],
  filterInput:'',

}
},

methods: {
fetchCustomers(){
  this.$http.get('http://slimapp.dev/api/customers')
    .then(function(response){

      this.customers = …

给定以下数组

let array = [[1, 2], [1, 2], [3, 4], [5, 6], [2, 1]]

I want to return the number of distinct arrays in this set. So the example above should return 3. How do I achieve this? I tried the code below, but it does not give the right answer

let distinct = 0
for (let i = 0; i < array.length; i++) {

  for (let j = i + 1; j < array.length - i; j++) { …