问题列表 - 第29701页

显然,将局部变量声明为const,可以防止运行时修改.Const实例变量是静态的(我相信).这是否与const局部变量的性质和用途有关？(例如穿线)

如何使此查询起作用:

SELECT column1.....,SUM(Hits) AS Hits   
FROM table 
WHERE  SUM(Hits) > 100
GROUP BY column1.....

问题是where子句,mysql显示错误:

Error Code : 1111
Invalid use of group function

我尝试将查询更改为:

 SELECT column1.....,SUM(Hits) AS Hits   
    FROM table 
    WHERE  Hits > 100
    GROUP BY column1.....

它没有帮助.

谢谢

我有我创建的以下方法,如果确实有问题的分隔符,它可以正常工作.我想暂时不使用LINQ ...

例如

如果我传入字符串"123; 322; 323",它的效果很好.

但是,如果我只传入一个没有分隔符的字符串值,如"123",它显然不会拆分它,因为没有分隔符.我只是想弄清楚检查和解释这个的最佳方法,并能够在列表中吐出一个值

public static List<int> StringToList(string stringToSplit, char splitDelimiter)
{
    List<int> list = new List<int>();

    if (string.IsNullOrEmpty(stringToSplit))
        return list;

    string[] values = stringToSplit.Split(splitDelimiter);

    if (values.Length < 1)
        return list;

    foreach (string s in values)
    {
        int i;
        if (Int32.TryParse(s, out i))
            list.Add(i);
    }

    return list;
}

更新:这是我提出的似乎工作,但肯定很长

    public static List<int> StringToList(string stringToSplit, char splitDelimiter)
    {
        List<int> list = new IntList();

        if (string.IsNullOrEmpty(stringToSplit))
            return list;

        if (stringToSplit.Contains(splitDelimiter.ToString()))
        {
            string[] values = stringToSplit.Split(splitDelimiter);

            if (values.Length <= 1) …

我已经尝试将以下内容放入我的Makefile中:

@if [ $(DEMO) -eq 0 ]; then \
    cat sys.conf | sed -e "s#^public_demo[\s=].*$#public_demo=0#" >sys.conf.temp; \
else \
    cat sys.conf | sed -e "s#^public_demo[\s=].*$#public_demo=1#" >sys.conf.temp; \
fi

但是当我运行make时,我收到以下错误:

sed: -e expression #1, char 30: unterminated `s' command

如果我运行sed控制台中包含的确切行,它们的行为正确.

为什么我会收到此错误以及如何解决问题？

我想知道如何在java中解析robots.txt.

有代码吗？

我有一个结合了变音符号的UTF8字符串.我想将它与\w正则表达式序列匹配.它匹配具有重音符号的字符,但如果存在组合变音符号的拉丁字符则不匹配.

>>> re.match("a\w\w\wz", u"aoooz", re.UNICODE)
<_sre.SRE_Match object at 0xb7788f38>
>>> print u"ao\u00F3oz"
aoóoz
>>> re.match("a\w\w\wz", u"ao\u00F3oz", re.UNICODE)
<_sre.SRE_Match object at 0xb7788f38>
>>> re.match("a\w\w\wz", u"aoo\u0301oz", re.UNICODE)
>>> print u"aoo\u0301oz"
ao?ooz

(看起来SO降价处理器在上面的组合变音符号有问题,但最后一行有一个)

反正将变音符号与\w？相匹配？我不想规范化文本,因为这个文本来自文件名,我不想要做一个完整的'文件名unicode规范化'.这是Python 2.5.

很长一段时间我没有在我的项目中运行黄瓜.它之前运行良好但现在,当我尝试运行黄瓜功能时,我有这个错误:

使用默认配置文件...

no such file to load -- zip/zip (MissingSourceFile)
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `polyglot_original_require'
/home/florence/.gem/ruby/1.8/gems/polyglot-0.2.9/lib/polyglot.rb:70:in `require'
/home/florence/NetBeansProjects/famicity/vendor/rails/activesupport/lib/active_support/dependencies.rb:158:in `require'
/home/florence/NetBeansProjects/famicity/app/controllers/albums_controller.rb:1
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `polyglot_original_require'
/home/florence/.gem/ruby/1.8/gems/polyglot-0.2.9/lib/polyglot.rb:70:in `require'
/home/florence/NetBeansProjects/famicity/vendor/rails/activesupport/lib/active_support/dependencies.rb:158:in `require'
/home/florence/NetBeansProjects/famicity/vendor/rails/activesupport/lib/active_support/dependencies.rb:265:in `require_or_load'
/home/florence/NetBeansProjects/famicity/vendor/rails/activesupport/lib/active_support/dependencies.rb:224:in `depend_on'
/home/florence/NetBeansProjects/famicity/vendor/rails/activesupport/lib/active_support/dependencies.rb:136:in `require_dependency'
/home/florence/NetBeansProjects/famicity/vendor/rails/railties/lib/initializer.rb:414:in `load_application_classes'
/home/florence/NetBeansProjects/famicity/vendor/rails/railties/lib/initializer.rb:413:in `each'
/home/florence/NetBeansProjects/famicity/vendor/rails/railties/lib/initializer.rb:413:in `load_application_classes'
/home/florence/NetBeansProjects/famicity/vendor/rails/railties/lib/initializer.rb:411:in `each'
/home/florence/NetBeansProjects/famicity/vendor/rails/railties/lib/initializer.rb:411:in `load_application_classes'
/home/florence/NetBeansProjects/famicity/config/../vendor/rails/railties/lib/initializer.rb:197:in `process'
/home/florence/NetBeansProjects/famicity/config/../vendor/rails/railties/lib/initializer.rb:113:in `send'
/home/florence/NetBeansProjects/famicity/config/../vendor/rails/railties/lib/initializer.rb:113:in `run'
/home/florence/NetBeansProjects/famicity/config/environment.rb:14
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `polyglot_original_require'
/home/florence/.gem/ruby/1.8/gems/polyglot-0.2.9/lib/polyglot.rb:70:in `require'
/home/florence/NetBeansProjects/famicity/features/support/env.rb:8
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `polyglot_original_require'
/home/florence/.gem/ruby/1.8/gems/polyglot-0.2.9/lib/polyglot.rb:70:in `require'
/home/florence/.gem/ruby/1.8/gems/cucumber-0.6.2/bin/../lib/cucumber/rb_support/rb_language.rb:124:in `load_code_file'
/home/florence/.gem/ruby/1.8/gems/cucumber-0.6.2/bin/../lib/cucumber/step_mother.rb:84:in `load_code_file'
/home/florence/.gem/ruby/1.8/gems/cucumber-0.6.2/bin/../lib/cucumber/step_mother.rb:76:in `load_code_files'
/home/florence/.gem/ruby/1.8/gems/cucumber-0.6.2/bin/../lib/cucumber/step_mother.rb:75:in `each'
/home/florence/.gem/ruby/1.8/gems/cucumber-0.6.2/bin/../lib/cucumber/step_mother.rb:75:in `load_code_files'
/home/florence/.gem/ruby/1.8/gems/cucumber-0.6.2/bin/../lib/cucumber/cli/main.rb:48:in `execute!'
/home/florence/.gem/ruby/1.8/gems/cucumber-0.6.2/bin/../lib/cucumber/cli/main.rb:20:in `execute'
/home/florence/.gem/ruby/1.8/gems/cucumber-0.6.2/bin/cucumber:8
/usr/bin/cucumber:19:in `load' …

我有这4个HTML代码段:

• 兄弟姐妹:

  <div class="a">...</div>
  <div class="b">...</div>        <!--selected-->
  <div class="b">...</div>        <!--not selected-->
  

  Run Code Online (Sandbox Code Playgroud)

• 包裹1:

  <div class="a">...</div>
  <div>
      <div class="b">...</div>    <!--selected-->
  </div>
  <div class="b">...</div>        <!--not selected-->
  

  Run Code Online (Sandbox Code Playgroud)

• 包裹2:

  <div>
      <div class="a">...</div>
  </div>
  <div>
      <div class="b">...</div>    <!--selected-->
  </div>
  <div class="b">...</div>        <!--not selected-->
  

  Run Code Online (Sandbox Code Playgroud)

• 分居:

  <div class="a">...</div>
  <div>...</div>
  <div class="b">...</div>        <!--selected-->
  <div>...</div>
  <div class="b">...</div>        <!--not selected-->
  <div>...</div>
  <div class="b">...</div>        <!--not selected-->
  

  Run Code Online (Sandbox Code Playgroud)

我怎样才能使用jQuery .b为任何给定.a元素选择下一个元素,而不管嵌套？

我想要这样的东西:

$('.a').each(function() {
    var nearestB = $(this)./*Something epically wonderful here*/;

    //do other stuff here
});

我最近切换到谷歌关闭一个新项目.我在向ajax调用中的标头添加真实性令牌时遇到问题.我该怎么做呢？

我的Ajax片段(使用goog.net.XhrIo类):

var initialHTMLContent = superField[i].getCleanContents();

var data = goog.Uri.QueryData.createFromMap(new goog.structs.Map({
  body: initialHTMLContent
 }));

 goog.net.XhrIo.send('/blogs/create', function(e) {
    var xhr = /** @type {goog.net.XhrIo} */ (e.target);
    alert(xhr.getResponseXml());
 }, 'POST', data.toString(), {
    'Accept' : 'text/xml'
            });

在后端使用导轨.

更新:

日志:

Processing BlogsController#create (for 127.0.0.1 at 2010-06-29 20:18:46) [PUT]
  Parameters: {"authenticity_token"=>""}

ActionController::InvalidAuthenticityToken (ActionController::InvalidAuthenticityToken):


Rendered rescues/_trace (272.4ms)
Rendered rescues/_request_and_response (1.2ms)
Rendering rescues/layout (unprocessable_entity)

我使用ShellExecute命令运行exe文件,该文件获取输入文本文件并返回输出文本文件.我写得像这样:

ShellExecute(mainFormHandle, 'open', 'Test.exe',
    'input.txt output.txt', nil, sw_shownormal);

//Read the output file...
S_List.LoadFromFile('output.txt');
Writeln(S_List[0])

我在运行此命令之前提供了input.txt文件.在我的程序的每次运行中,输入文件都会更改,输出文件也会更改.

问题是这样的:我看不到输出文件中的变化!在控制台中写入的行来自上一个文件,而不是新更改的文件.我的意思是,浏览器中的文件已更改,但我读取的文件仍然是旧文件.

这看起来有点奇怪,但我想知道有没有办法在读取之前刷新输出文件？或者我在这里遗失了什么？

提前致谢.