小编Mar*_*n G的帖子

在C#Regex中是否等同于\ Q ...\E？我找不到它.

我需要将最后一个参数传递给windows批处理脚本,我该怎么做？

我可以通过ASP.NET将客户端javascript中的对象发送到服务器端代码吗？

options(digits.secs = 3);

> strptime("2007-03-30 15:00:00.007", format = "%Y-%m-%d %H:%M:%OS");
[1] "2007-03-30 15:00:00.007"
> strptime("2007-03-30 15:00:00.008", format = "%Y-%m-%d %H:%M:%OS");
[1] "2007-03-30 15:00:00.008"
> strptime("2007-03-30 15:00:00.009", format = "%Y-%m-%d %H:%M:%OS");
[1] "2007-03-30 15:00:00.008"
> strptime("2007-03-30 15:00:00.010", format = "%Y-%m-%d %H:%M:%OS");
[1] "2007-03-30 15:00:00.01"
> strptime("2007-03-30 15:00:00.011", format = "%Y-%m-%d %H:%M:%OS");
[1] "2007-03-30 15:00:00.010"
> strptime("2007-03-30 15:00:00.999", format = "%Y-%m-%d %H:%M:%OS");
[1] "2007-03-30 15:00:00.998"

我很困惑,为什么与"009"有一毫秒的差异,然后再从"011"那里得到.

从我有一个程序的代码,它在应用程序窗口周围绘制和移动方块,我在调整应用程序窗口大小时遇到​​了麻烦.当我处理调整大小并相应地改变状态时,屏幕上应该绘制并且在调整大小之前的所有内容都会消失.我不知道为什么因为在窗口大小调整期间没有任何对象内部坐标被更改.

我的问题是,任何人都可以指出我正确的方向来解决我的问题.(代码编译好)

void ResizeWindow()
{
    screen_width = event.resize.w;
    screen_height = event.resize.h;

    SDL_SetVideoMode(screen_width, screen_height, bpp, SDL_OPENGL | SDL_RESIZABLE | SDL_DOUBLEBUF);

    glViewport(0, 0, screen_width, screen_height);
    glMatrixMode(GL_PROJECTION);
    glOrtho(0, screen_width, 0, screen_height, -1, 1);
    glLoadIdentity();
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    glClear(GL_COLOR_BUFFER_BIT);
    glLoadIdentity();
}

主循环:

while (running == true)

{

    while(SDL_PollEvent(&event))

    {

        switch(event.type)

        {

            case SDL_VIDEORESIZE: ResizeWindow(); break; // resizing called here
            case SDL_QUIT: running = false; break;
            case SDL_KEYDOWN: square.Handle_Input(down); break;
            case SDL_KEYUP: square.Handle_Input(up); break;

        }

    }

    square.Move();
    square.Check_Collision();

    glClear(GL_COLOR_BUFFER_BIT);

    square.Draw();

    SDL_GL_SwapBuffers();

}

这一切都完美运行,直到窗口调整大小.

我已经完成 merge some-branchinto master，但出现冲突。如何撤消这个操作？

git checkout master
git merge some-branch
...
CONFLICTS :(

如何计算别名列上的聚合函数SUM？

SELECT a.question_id, 
       a.level, 
       Count(a.question_id) AS rank, 
       Sum(rank)        AS total 
FROM   logs AS a, 
       question AS b 
WHERE  a.question_id = b.q_id 
       AND a.level = '2' 
GROUP  BY a.question_id 
ORDER  BY rank DESC 

我想在Ubuntu上为Android编译SDL2.

我使用./configure配置SDL2 --host = arm-linux-androideabi

在使用ndk-build进行编译之后,我得到了一系列未定义的引用:

Compile thumb  : SDL2-2.0.0 <= SDL_androidkeyboard.c
Compile thumb  : SDL2-2.0.0 <= SDL_androidtouch.c
Compile thumb  : SDL2-2.0.0 <= SDL_androidvideo.c
Compile thumb  : SDL2-2.0.0 <= SDL_androidwindow.c
SharedLibrary  : libSDL2-2.0.0.so
/home/ire018/Applications/android-ndk-r9/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: /home/ire018/workspace/SDLActivity/obj/local/armeabi/objs/SDL2-2.0.0/src/audio/SDL_audio.o: in function bootstrap:SDL_audio.c(.data.rel.ro+0x0): error: undefined reference to 'PULSEAUDIO_bootstrap'
/home/ire018/Applications/android-ndk-r9/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: /home/ire018/workspace/SDLActivity/obj/local/armeabi/objs/SDL2-2.0.0/src/audio/SDL_audio.o: in function bootstrap:SDL_audio.c(.data.rel.ro+0x4): error: undefined reference to 'DISKAUD_bootstrap'
/home/ire018/Applications/android-ndk-r9/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: /home/ire018/workspace/SDLActivity/obj/local/armeabi/objs/SDL2-2.0.0/src/core/android/SDL_android.o: in function Java_org_libsdl_app_SDLActivity_onNativeResize:/home/ire018/workspace/SDLActivity/jni/SDL2-2.0.0/src/core/android/SDL_android.c:148: error: undefined reference to 'Android_SetScreenResolution'
/home/ire018/Applications/android-ndk-r9/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: /home/ire018/workspace/SDLActivity/obj/local/armeabi/objs/SDL2-2.0.0/src/core/android/SDL_android.o: in function Java_org_libsdl_app_SDLActivity_onNativeKeyDown:/home/ire018/workspace/SDLActivity/jni/SDL2-2.0.0/src/core/android/SDL_android.c:155: error: undefined reference to 'Android_OnKeyDown'
/home/ire018/Applications/android-ndk-r9/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: /home/ire018/workspace/SDLActivity/obj/local/armeabi/objs/SDL2-2.0.0/src/core/android/SDL_android.o: in function Java_org_libsdl_app_SDLActivity_onNativeKeyUp:/home/ire018/workspace/SDLActivity/jni/SDL2-2.0.0/src/core/android/SDL_android.c:162: error: undefined …

谷歌搜索后似乎在Erlang中没有多行注释支持,这是真的吗？

如果是这样,为什么？

我知道一些编辑支持评论区域(在该区域的每一行上首先添加%),但我真的不想基于此选择编辑器.

我对不同目录中的两个文件进行了更改，如何为单个提交添加两个文件。我可以做什么，添加第一个文件，然后将目录更改为第二个文件，然后添加第二个文件，最后执行提交。这行得通吗？