小编sim*_*imo的帖子

到目前为止,我只能判断一个属性是否被继承,但我需要知道继承的来源(例如,哪个CSS文件导致最终值？)这可能吗？

有一个方便的工具吗？

编辑

这是我在chrome Computed Style(show inheritance)中得到的内容.请参阅direction属性,没有关于其继承源的信息

我试图为我的按钮使用渐变样式,但是,我有悬停样式的问题,这是悬停前的按钮:

这是在悬停之后:

这是haml按钮:

= link_to '#', {:class=>'tour_btn btn btn-large btn-primary', :style=>'margin-left: 10px; width: 105px;'} do
        %h3
          Take a Tour

减:

.tour_btn {
    #gradient > .vertical(#F98C51, #a35b35);
}

有什么好主意吗？是否可以为悬停状态指定另一种渐变样式？或者至少,不要在悬停时更改按钮？

当我跑步时vagrant up,我得到:

D:\GitHub\website\rails-dev-box>vagrant up
Bringing machine 'default' up with 'virtualbox' provider...
==> default: Checking if box 'ubuntu/trusty32' is up to date...
==> default: Clearing any previously set forwarded ports...
==> default: Clearing any previously set network interfaces...
==> default: Preparing network interfaces based on configuration...
    default: Adapter 1: nat
==> default: Forwarding ports...
    default: 3000 => 1234 (adapter 1)
    default: 22 => 2222 (adapter 1)
==> default: Booting VM...
==> default: Waiting for machine to boot. This may …

我试过用这样的adb来安装我的apk:

D:\C_Desktop\Development\Android SDK\platform-tools>adb install "C:\test_haxe\bin\android\bin\bin\testhaxe-debug.apk"
4274 KB/s (3702929 bytes in 0.846s)
        pkg: /data/local/tmp/testhaxe-debug.apk
Success

所以,它的安装很好,但在我的手机上,我找不到apk文件,安装后是否删除了？!

另外,我试图像这样卸载它:

adb uninstall com.ketab.haxe

但我明白了

Failure

因为我没有模拟器,所以每次都要安装应用程序以查看进度,所以我需要卸载它然后在我的手机上安装新的应用程序,这是正确的方式吗？

我刚刚将reactjs项目升级15.4.2为16.3.2,项目编译得很好但是,在浏览器中,我收到此错误:

Uncaught TypeError: Cannot read property 'bool' of undefined
    at Object.<anonymous> (propTypes.js:3)
    at __webpack_require__ (propTypes.js:3)
    at Object.<anonymous> (propTypes.js:3)
    at __webpack_require__ (propTypes.js:3)
    at Object.exports.__esModule (propTypes.js:3)
    at __webpack_require__ (propTypes.js:3)
    at Object.<anonymous> (propTypes.js:3)
    at __webpack_require__ (propTypes.js:3)
    at Object.<anonymous> (propTypes.js:3)
    at __webpack_require__ (propTypes.js:3)

但我可以知道导致错误的线路在哪里..也许我还要升级其他软件包？

这是我目前的情况:

"devDependencies": {
    "axios": "^0.17",
    "babel-preset-react": "^6.24.1",
    "bootstrap-sass": "^3.3.7",
    "create-react-class": "^15.6.3",
    "cross-env": "^5.1",
    "laravel-mix": "^1.0",
    "lodash": "^4.17.4",
    "react": "16.3.2",
    "react-dom": "16.3.2"
  },
  "dependencies": {
    "ajv": "^6.4.0",
    "animate.css": "^3.1.1",
    "bootstrap": "^3.3.7",
    "dom-tools": "^0.1.4",
    "font-awesome": "^4.7.0",
    "history": "^4.7.2", …

虽然我在GraphiQL上成功测试了GraphiQL工具后复制并粘贴了graphQL查询,但当我在reactJS应用程序中的Apollo客户端中尝试时,查询返回错误:

[GraphQL error]: Message: Cannot query field "allStudents" on type "Query"., Location: [object Object], Path: undefined

这是我的实现:

const link = createHttpLink({
  uri: 'http://localhost:8000/graphql',
  fetchOptions: { method: "POST" }
});

const client = new ApolloClient({
  link: link 
});

const GET_STUDENTS = gql`
query getStudents($schoolID: Int!){
  allStudents(schoolId: $schoolID){
    pickUpLat
    pickUpLng
  }
}
`;

client
  .query({
    query: GET_STUDENTS,
    variables: { schoolID: 1 }
  })
  .then(result => console.log(result));

可能有什么不对？这是我预期的正确答案:

{
  "data": {
    "allStudents": [
      {
        "pickUpLat": 31.9752942479727,
        "pickUpLng": 35.8438429235775
      },
      {
        "pickUpLat": 31.9754545979993,
        "pickUpLng": …

可以使用以下事件,但必须为每个元素附加它们:

GotKeyboardFocus,LostKeyboardFocus

.NET WPF中是否有一种方法可以全局检测焦点元素是否发生了变化？无需为所有可能的元素添加事件侦听器？

我需要覆盖关系的名称,这是我的模型:

class User < ActiveRecord::Base

  has_many :class_rooms_member_ships

  has_many :class_rooms
  has_many :class_rooms, :through=> :class_rooms_member_ships

end

现在,我需要另一个名字来使用 class_rooms :through=> :class_rooms_member_ships

我怎样才能做到这一点:

user.class_rooms
user.class_rooms_through

任何的想法 ？

在Windows 10中,当我在Windows中通过Kitematic中的容器启动MS PowerShell ssh时,我注意到我无法退格或删除,而是我得到^ H用于退格而不是实际删除前一个字符.

我错过了什么吗？

在我的docker-compose中:

laravel:
    image: trackware
    links:
        - postgis:postgis
    ports:
        - "80:80"
        - "3306:3306"
        - "443:443"
        - "220:22"
        - "8000:8000"
    net: "host"
    restart:  always
    volumes:
        - C:/H/repositories/pubnub:/share
    container_name: laravel

postgis:
    image: mdillon/postgis
    env_file: .postgis_env
    ports:
        - "9090:9000"
        - "54320:5432"
    container_name: postgis

如果我跑,docker-compose up -d我得到这个错误:

Conflicting options: host type networking can't be used with links. This would result in undefined behavior

那么,net: "host"在链接到postgis容器时我将如何使用？laravel容器需要运行pubnub客户端,这需要高性能的网络来实现实时消息处理,还需要链接到postgis容器来访问db.

那么,有什么建议吗？我正在使用docker 1.10.2