小编use*_*363的帖子

将公钥添加到bitbucketacct后,ssh -T git@bitbucket.org返回(在windows中):

The authenticity of host 'bitbucket.org (131.103.20.167)' can't be established.
RSA key fingerprint is 65:8c:1b:f2:6f:91:6b:5c:3b:ec:4a:46:46:74:7z:40.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'bitbucket.org' (RSA) to the list of known hosts.
logged in as myusername.

You can use git or hg to connect to Bitbucket. Shell access is disabled.

我们bitbucket.org已经确认已添加到known_hosts.该cap deploy命令返回:

Host key verification failed.
fatal: The remote end hung up unexpectedly

我们在 …

在 Rails 文档Active Record Associations 中，:dependentfor的前两个值has_one是：

4.2.2.4 :dependent

Controls what happens to the associated object when its owner is destroyed:

    :destroy causes the associated object to also be destroyed
    :delete causes the associated object to be deleted directly from the database (so callbacks will not execute)

我的理解:destroy是，例如，一个customer has_one address. 用:dependent => :destroy, 如果customer被删除，那么address在从数据库customer中删除后会自动从数据库中删除，我们通常使用:destroy. 有什么用:delete？

我正在对用户模型进行单元测试。用户名不能为空。单元测试如下：

it('should reject no name', async () => {
   name = '';
   expect(await User.create(payload())).toThrow();
});

当payload拥有除空名称之外的所有数据时，单元测试会抛出以下错误：

 SequelizeValidationError: Validation error: Invalid validator function: unique,
    Validation error: Invalid validator function: msg,
    Validation error: column "cell" does not exist

然而这里的断言.toThrow是不正确的，测试用例仍然失败。尝试了 toBeUndefine 但无济于事。对于此类错误，正确的断言是什么？

这是App.jsReact Native 0.59 应用程序的。

import React, {Component} from 'react';
import { createStackNavigator, createAppContainer } from 'react-navigation';
import Event from './src/components/event/Event.js';
import Chat from './src/components/chat/Chat.js';
import GLOBAL from "../../lib/global";

//socket.io
const socket = io(GLOBAL.BASE_URL, {
  transports: ['websocket'],
  jsonp: false
});

//create the navigator
const navigator = createStackNavigator(
  {
    Event:  Event,
    Chat: {
      screen: Chat,
      
    } 
  }, {
    initialRouteName: "Event"
  }
);

//export it as the root component
export default createAppContainer(navigator); 

将socket需要被传递到Chat组件。由于只有 Chat 组件使用socket，我想 …

/**
 * Sample React Native App
 * https://github.com/facebook/react-native
 *
 * @format
 * @flow
 */

import React, {Component} from 'react';
import {Platform, StyleSheet, Text, View} from 'react-native';
import { createBottomTabNavigator, createSwitchNavigator, createStackNavigator, createAppContainer } from 'react-navigation';
import Event from './src/components/event/Event.js';
import Chat from './src/components/chat/Chat.js';
import Signup from "./src/components/signup/Signup.js";
import Verif1 from "./src/components/signup/Verif1.js";
import NewEvent from "./src/components/event/Newevent.js";
import EditUser from "./src/components/user/Edituser";
import NewUser from "./src/components/user/Newuser";
import io from 'socket.io-client';
import GLOBAL from "./src/lib/global";
import SplashScreen from "./src/components/splashscreen/SplashScreen";


const instructions = Platform.select({
  ios: …

这是如何await使用的：

关键字 await 使 JavaScript 等待，直到该承诺解决并返回其结果。

如果应用程序不想await直到 apromise解决并返回（例如更新非关键后端数据库），是否可以调用promisewithout await？在承诺完全完成之前，可能会在promise没有await退出的情况下过早调用吗？

这是raislcasts.com复杂形式的一个函数 - 关于动态地将字段添加到表单的示例.该函数使用rails 3.1.3和jquery运行.

  def link_to_add_fields(name, f, association)
    new_object = f.object.class.reflect_on_association(association).klass.new
    fields = f.fields_for(association, new_object, :child_index => "new_#{association}") do |builder|
      render(association.to_s.singularize + "_fields", :f => builder)
    end
    link_to_function(name, "add_fields(this, \"#{association}\", \"#{escape_javascript(fields)}\")")
  end

该协会是一个象征,必须是.\"...\"这里的目的是#{..}什么？删除它会导致错误.

这是html.erb代码,我们必须使<li>元素之间的空间更大.

<table width="90%", style="font-size:20px;line-height:44px;">
  <tr>
    <td width="40%" valign="top">
      <ul>
        <li><%= link_to 'Expense', SUBURI + "/authentify/view_handler?index=1" %></li>
        <li><%= link_to 'Category', SUBURI + "/authentify/view_handler?index=1" %></li>
      </ul>
    </td>
  </tr>
</table>

字体大小有效.然而,line-height:44px根本不起作用.如何line-height在html.erb中完成这项工作？谢谢.

在Windows操作系统中,反斜杠\用于文件路径(c:\mytext.txt).在linux/unix OS中,正斜杠/用于文件路径(/home/mytext.txt).给定一个目录路径file_dir和file_name,如何找到合适slash的操作系统和组装的文件路径(OS可以是Windows或Linux)？file_dir + '/' + file name还是file_dir + '\' + file_name？什么逃避斜线？