小编Ng *_*Qin的帖子

我一直在尝试使用Rails,当我使用rake时,我得到了这个错误.我应该使用哪些运行时间的建议？

ngzhongqin@ngzhongqin-linux:~/RailsProjects/webuiltit$ rake db:create:all --trace
rake aborted!
Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes.
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/execjs-1.2.4/lib/execjs/runtimes.rb:45:in `autodetect'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/execjs-1.2.4/lib/execjs.rb:5:in `<module:ExecJS>'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/execjs-1.2.4/lib/execjs.rb:4:in `<top (required)>'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/coffee-script-2.2.0/lib/coffee_script.rb:1:in `require'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/coffee-script-2.2.0/lib/coffee_script.rb:1:in `<top (required)>'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/coffee-script-2.2.0/lib/coffee-script.rb:1:in `require'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/coffee-script-2.2.0/lib/coffee-script.rb:1:in `<top (required)>'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/coffee-rails-3.1.0/lib/coffee-rails.rb:1:in `require'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/coffee-rails-3.1.0/lib/coffee-rails.rb:1:in `<top (required)>'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler/runtime.rb:68:in `require'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler/runtime.rb:68:in `block (2 levels) in require'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler/runtime.rb:66:in `each'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler/runtime.rb:66:in `block in require'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler/runtime.rb:55:in `each'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler/runtime.rb:55:in `require'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler.rb:120:in `require'
/home/ngzhongqin/RailsProjects/webuiltit/config/application.rb:13:in `<top (required)>'
/home/ngzhongqin/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
/home/ngzhongqin/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
/home/ngzhongqin/RailsProjects/webuiltit/Rakefile:5:in `<top (required)>'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/rake_module.rb:25:in `load'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/rake_module.rb:25:in `load_rakefile'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/application.rb:495:in `raw_load_rakefile'
/home/ngzhongqin/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/application.rb:78:in …

我正在尝试在启动硒铬时禁用所有镀铬扩展.但是每次运行代码时,所有扩展都会继续启动.有没有办法禁用扩展.

示例代码

public static void main(String[] args) throws IOException {
    System.setProperty("webdriver.chrome.driver", "C:\\Selenium\\chromedriver.exe");
    DesiredCapabilities capabilities = DesiredCapabilities.chrome();
    capabilities.setCapability("chrome.binary", "C:\\Users\\ngzhongqin\\AppData\\Local\\Google\\Chrome\\Application\\chrome.exe");
    WebDriver driver = new ChromeDriver(capabilities);
    driver.get("http://www.cnn.com");
    WebElement searchBox = driver.findElement(By.name("q"));
}

当视图放置在 ScrollView 中以进行本机反应时，为什么 flexDirection 不起作用？

当我的视图未放置在滚动视图中时，参数 flexDirection: 'row' 工作正常。

export default class ProfileScreen extends Component {
render() {
    return (
            <View style={{flex: 0.1, flexDirection: 'row', justifyContent: 'flex-start', height:70}}>
                <View style={{flex:0.2, backgroundColor: 'red'}} />
                <View style={{flex:0.8, backgroundColor: 'skyblue'}} />
                <View style={{flex:0.2, backgroundColor: 'steelblue'}} />
            </View>
    );
}

当它被放置在滚动视图中时，参数 flexDirection 不再起作用。

export default class ProfileScreen extends Component {
render() {
    return (
        <ScrollView stickyHeaderIndices={[0]} >
            <View style={{flex: 0.1, flexDirection: 'row', justifyContent: 'flex-start', height:70}}>
                <View style={{flex:0.2, backgroundColor: 'red'}} />
                <View style={{flex:0.8, backgroundColor: 'skyblue'}} …

我正在尝试使用css类"btnProceed"选择第3个按钮

    <input type="button" class="btnProceed" value=" " onclick="SecuritySubmit(false,'https://somewebsite.com/key=xxyyzz');return false;">

我的代码如下:

    WebElement query_enquirymode = driver.findElement(By.className("btnProceed"));
    query_enquirymode.click();

我只能使用"btnProceed"选择第一个元素

有没有办法选择第3个按钮？