小编Siv*_*lam的帖子

根据java文档,在任何java.io Streams上调用close()会自动调用flush().但是我已经在很多例子中看到过,即使在生产代码中,开发人员在close()之前也明确地使用了flush().在什么条件下我们需要在close()之前使用flush()？

我试图找到将InputStream传递给OutputStream的最佳方法.我没有选择使用任何其他库,如Apache IO.这是片段和输出.

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.channels.FileChannel;

public class Pipe {
    public static void main(String[] args) throws Exception {

        for(PipeTestCase testCase : testCases) {
            System.out.println(testCase.getApproach());
            InputStream is = new FileInputStream("D:\\in\\lft_.txt");
            OutputStream os = new FileOutputStream("D:\\in\\out.txt");

            long start = System.currentTimeMillis();            
            testCase.pipe(is, os);
            long end = System.currentTimeMillis();

            System.out.println("Execution Time = " + (end - start) + " millis");
            System.out.println("============================================");

            is.close();
            os.close();
        }

    }

    private static PipeTestCase[] testCases = {

        new PipeTestCase("Fixed Buffer Read") {         
            @Override …

如何verbose_name在其管理模块中访问模型？如果我们有一个如下所示的模型实例,我们可以访问相同的内容.

instance._meta.verbose_name.title()

命令:

\eclipse-SDK-4.2RC3-win32-x86_64_001\eclipse\plugins>java -jar org.eclipse.osgi_3.8.0.v20120529-1548.jar -console

异常(来自日志文件)

!SESSION 2012-06-22 23:36:27.649 -----------------------------------------------
eclipse.buildId=unknown
java.version=1.6.0_25
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Command-line arguments:  -console

!ENTRY org.eclipse.osgi 4 0 2012-06-22 23:36:28.632
!MESSAGE Could not find bundle: org.eclipse.equinox.console
!STACK 0
org.osgi.framework.BundleException: Could not find bundle: org.eclipse.equinox.console
    at org.eclipse.osgi.framework.internal.core.ConsoleManager.checkForConsoleBundle(ConsoleManager.java:211)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.startup(EclipseStarter.java:297)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.main(EclipseStarter.java:151)

!ENTRY org.eclipse.osgi 4 0 2012-06-22 23:36:28.663
!MESSAGE Application error
!STACK 1
java.lang.IllegalStateException: Unable to acquire application service. Ensure that the org.eclipse.core.runtime bundle is resolved and started (see config.ini). …

在Django管理界面中,是否可以排除Inline中的一些字段？

在覆盖特定模型的save()方法时,是否可以确定它是新记录还是更新？

我试图从Python 2.7.10 64位Windows版本的源代码编译pycrypto-2.6.1并面临以下错误.

Processing pycrypto-2.6.1.tar.gz
Writing c:\users\sivasuba\appdata\local\temp\easy_install-ecznz_\pycrypto-2.6.1\setup.cfg
Running pycrypto-2.6.1\setup.py -q bdist_egg --dist-dir c:\users\sivasuba\appdata\local\temp\easy_install-ecznz_\pycrypto-2.6.1\egg-dist-tmp-us3gka
warning: GMP or MPIR library not found; Not building Crypto.PublicKey._fastmath.
winrand.c
LINK : fatal error LNK1104: cannot open file 'python27.lib'
error: Setup script exited with error: command 'C:\\Users\\sivasuba\\AppData\\Local\\Programs\\Common\\Microsoft\\Visual C++ for Python\\9.0\\VC\\Bin\\amd64\\link.exe' failed with exit status 1104

谷歌搜索没有多大帮助.任何有关这方面的帮助将不胜感激.

PS我不是在寻找预先编译的二进制文件.要求是从源代码构建它.

python中的any命令行选项是否打印异常/错误类层次结构？

输出应类似于http://docs.python.org/2/library/exceptions.html#exception-hierarchy

是否可以动态地为forms.FileField()提供初始值？

是否有可能更改javascript警报图标？默认情况下,它显示警告图标.