小编Els*_*ban的帖子

我ReferenceError: performance is not defined在尝试使用performance.now()来测量函数调用的执行时间时遇到错误:

export async function find(someId: string, ctx: context.IContext) {

      try {
        var t0 = performance.now();

        var res = someModel.find(someId, ctx.cookies);

        var t1 = performance.now();
        console.log("Call to find took " + (t1 - t0) + " milliseconds.");

        return res;
      } catch (err) {
        console.error(err);
        throw err;
      }
    }

我有什么想法可以解决这个问题？

我有这个pom.xml文件

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>company</groupId>
        <artifactId>trick-services-parent</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

    <artifactId>tricker-services-webapp</artifactId>
    <packaging>war</packaging>
    <name>trick-rest</name>
    <!-- <build> <finalName>trick</finalName> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> 
        <artifactId>maven-war-plugin</artifactId> <configuration> <outputDirectory>../vagrant/deployments</outputDirectory> 
        </configuration> </plugin> <plugin> <artifactId>maven-surefire-plugin</artifactId> 
        <version>2.17</version> </plugin> </plugins> <resources> <resource> <directory>src/main/resources</directory> 
        <filtering>true</filtering> </resource> </resources> <testResources> <testResource> 
        <directory>src/test/resources</directory> <filtering>true</filtering> </testResource> 
        </testResources> </build> -->

    <build>
        <defaultGoal>test</defaultGoal>
        <plugins>
            <!-- The compiler plugin enforces Java 1.6 compatibility and controls 
                execution of annotation processors -->
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.3.2</version>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>
            <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.12</version>
            </plugin>
        </plugins>
    </build>



    <dependencyManagement>

        <dependencies>
            <!-- …

我有一个JavaEE应用程序,我正在JBoss 6.1上部署它.我想用Log4j.

这些是我的依赖:

<dependency>
    <groupId>commons-logging</groupId>
    <artifactId>commons-logging</artifactId>
    <version>1.1.1</version>
</dependency>

<dependency>
        <groupId>org.slf4j</groupId>
    <artifactId>slf4j-log4j12</artifactId>
    <version>1.5.10</version>
</dependency>

<dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.16</version>
</dependency>

<dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.6.4</version>
</dependency>

这是我的log4j.properties

log4j.rootLogger=info, stdout

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{${datestamp}} %5p: %c{2} - %m%n

我在standalone.conf上添加了这一行

JAVA_OPTS="$JAVA_OPTS -Dorg.jboss.as.logging.per-deployment=false"

这是我的jboss-deployment-structure.xml

<?xml version="1.0" encoding="UTF-8"?>

<jboss-deployment-structure>
 <deployment>
  <exclusions>
    <module name="org.apache.log4j" />
    <module name="org.apache.commons.logging" />
    <module name="org.slf4j" />
    <module name="org.slf4j.impl" />
  </exclusions>   
 </deployment>
</jboss-deployment-structure>

我在控制台上看不到任何日志.任何的想法？

我试图使用我已经在.c文件上的.h文件中声明的变量,我给了我一个编译错误:

未定义的引用 var

这是mach.c内容:

#include "machheader.h"

int 
main( void )
{
    var = 1;
    printf("Variable %d\n", var);
}

而我的machheader.h只包含这个:

extern int var;

任何的想法？