小编bar*_*317的帖子

让我假装我有这样的事情:

df <- data.frame(
      PERSON = c("Peter", "Peter", "Marcel" , "Lisa", "Lisa"),        
      FRUIT = c("Apple", "Peach","Apple", "Apple", "Peach" ), 
      A = c(100, 200, 100, 200, 300), 
      B=c(1,2,3,4,5) )
df$PERSON <- as.factor(df$Person)
df$FRUIT <- factor(df$FRUIT, levels = c("Apple", "Peach", "Coconut"))

结果如何

str(df): 'data.frame':  5 obs. of  4 variables:
$ PERSON: Factor w/ 3 levels "Lisa","Marcel",..: 3 3 2 1 1
$ FRUIT : Factor w/ 3 levels "Apple","Peach",..: 1 2 1 1 2
$ A     : num  100 200 100 200 …

更新至2017.2后,Intellij IDEA无法在Dell Ultrasharp U2415b上正确扩展.图标非常大,工作空间非常小.

我已经检查过,Intellij用HiDPI支持改变了一些东西.

有人遇到同样的问题吗？

我有一个带有 AzureFunctionVersion v3 的 Azure Function，一段时间以来，我在 Application Insights 或 Rider Console 中看不到任何未记录在 FunctionTrigger 本身中的日志。

[FunctionName("test")]
public IActionResult Test([HttpTrigger(AuthorizationLevel.Function, "delete", Route = BasePath + "/{roomId}")] HttpRequest req,
            ILogger log)
{
   log.LogInformation("Log is shown");

   myservice.DoIt();
}

namespace MyApp.Test.Service {
   public MyService(ILoggerFactory loggerFactory)
   {       
     _log = loggerFactory.CreateLogger(GetType().Namespace);
   }

   public void DoIt() {
      _log.LogInformation("Log is not shown");
   }
}

我的 host.json 看起来像：

"logging": {
        "applicationInsights": {
            "samplingExcludedTypes": "Request",
            "samplingSettings": {
                "isEnabled": false
            }
        },
        "logLevel": {
            "MyApp.*": "Information"
        }
    }

我发现了一些奇怪的行为，无法解释发生了什么：

$e = 3;
echo "with array " . print_r($e);

给出：

3with array 1

为什么？