我正在尝试使用XPath来选择具有Location值的方面的项目,但是目前我的尝试甚至只是选择所有项目失败:系统愉快地报告它找到了0项,然后返回(而不是节点应该由一个foreach循环).我很感激帮助制作我的原始查询或只是让XPath工作.
XML
<?xml version="1.0" encoding="UTF-8" ?>
<Collection Name="My Collection" SchemaVersion="1.0" xmlns="http://schemas.microsoft.com/collection/metadata/2009" xmlns:p="http://schemas.microsoft.com/livelabs/pivot/collection/2009" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<FacetCategories>
<FacetCategory Name="Current Address" Type="Location"/>
<FacetCategory Name="Previous Addresses" Type="Location" />
</FacetCategories>
<Items>
<Item Id="1" Name="John Doe">
<Facets>
<Facet Name="Current Address">
<Location Value="101 America Rd, A Dorm Rm 000, Chapel Hill, NC 27514" />
</Facet>
<Facet Name="Previous Addresses">
<Location Value="123 Anywhere Ln, Darien, CT 06820" />
<Location Value="000 Foobar Rd, Cary, NC 27519" />
</Facet>
</Facets>
</Item>
</Items>
</Collection>
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C#
public void countItems(string …Run Code Online (Sandbox Code Playgroud) 我一直在寻找async和await.我很喜欢.
我很好奇是否支持async和await实体框架?
实体框架满足async/await支持的用例,如果我想在实体框架中使用async/await,我该怎么做?
即:我能够在redis(booksleeve)周围有一个包装器.
所以当我有一个存储库模式时,我可以在EF中使用async/await吗?怎么样?
当我跑来make -j3并行构建时,我明白了
warning: -jN forced in submake: disabling jobserver mode.
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在文档中我发现了警告
如果make检测到子系统可以通信的系统上与并行处理相关的错误条件.
这些错误情况是什么?我该怎么做才能治愈它们或抑制错误信息?
makefile是从CMake生成的,所以我不能(=我不想)编辑makefile.
在GCC中,我可以使用链接器标志-Wl,--start-group并-Wl,--end-group解决与具有循环依赖关系的库的链接问题.我想对clang做同样的事情,但似乎这个功能在lld 3.2版本中被删除了.我该怎么做?
在检查CMake源之后,我成功配置并构建了CMake.但是我如何构建CMake的文档?我安装了Sphinx.
没有目标make doc,我不得不调用哪个Sphinx命令.我没有在CMake Wiki或他们的邮件列表档案中找到任何提示.
到目前为止,我只使用Linux编写C++代码,但我想学习在Windows中使用CMake来简化操作.
首先,我编写了以下CMakeLists.txt:
cmake_minimum_required(VERSION 2.8)
PROJECT( CMakeWin )
SET(CMAKE_BUILD_TYPE Release)
# find opencv and set variables
Set(OpenCV_DIR C:/Users/Erik/Documents/Libraries/opencv/build)
FIND_PACKAGE(OpenCV REQUIRED)
#set the default path for built executables to the "bin" directory
set(EXECUTABLE_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/bin)
ADD_EXECUTABLE( ${PROJECT_NAME}
src/main.cpp
)
TARGET_LINK_LIBRARIES(${PROJECT_NAME} ${OpenCV_LIBS})
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当我运行CMake(使用Visual Studio 11配置)它似乎正常工作,但当我打开CMakeWin.sln项目并构建然后运行它,我得到
Unable to start program C:\..... The system cannot find the file
specified.
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但我也收到了
access denied.
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当我直接进入Release或Debug文件夹并运行时
CMakeWin.exe
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它按原样运行.问题是什么?
编辑:
为了避免让visual studio试图运行ALL_BUILD,我不得不将CMakeWin设置为StartUp项目.请参阅https://simtk.org/forums/viewtopic.php?f=91&t=3676和以下评论.
我正在为我的 C 项目使用 CLion 编辑器(带有 CMake),但我从未使用过外部库,我的问题是如何将外部库(例如 libxml2)链接到我的项目?我见过一些与此类似的问题,但没有一个对我有用。我的项目是在 Windows 上编译的,我有 libxml .dll、include 和 .lib 文件(Windows 的二进制文件)。
编辑:我的 CMakeLists.txt 文件在答案建议后:
cmake_minimum_required(VERSION 3.2)
project(time_table)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(SOURCE_FILES
course.c
course.h
day.h
defines.h
find_tables.c
find_tables.h
item.h
parse_info.c
parse_info.h
table.c
table.h
time_table.c grades.c grades.h)
link_libraries(C:/Users/Gal/Desktop/time_table/libxml2-2.7.8.win32/lib)
add_executable(time_table ${SOURCE_FILES})
target_link_libraries(time_table libxml2)
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这就是我得到的:
"C:\Program Files (x86)\JetBrains\CLion 1.1.1\bin\cmake\bin\cmake.exe" --build C:\Users\Gal\.clion11\system\cmake\generated\2eda76ff\2eda76ff\Debug --target time_table -- -j 8
[ 14%] Linking C executable time_table.exe
c:/mingw/bin/../lib/gcc/mingw32/4.8.1/../../../../mingw32/bin/ld.exe: cannot find -llibxml2
collect2.exe: error: ld returned 1 exit status
mingw32-make.exe[3]: *** [time_table.exe] Error 1
CMakeFiles\time_table.dir\build.make:225: recipe …Run Code Online (Sandbox Code Playgroud) 我目前正在尝试使用CMake构建项目。这是我得到的输出
CMake Warning at ext/quazip/CMakeLists.txt:4 (FIND_PACKAGE):
By not providing "FindQt5.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "Qt5", but
CMake did not find one.
Could not find a package configuration file provided by "Qt5" with any of
the following names:
Qt5Config.cmake
qt5-config.cmake
Add the installation prefix of "Qt5" to CMAKE_PREFIX_PATH or set "Qt5_DIR"
to a directory containing one of the above files. If "Qt5" provides a
separate development package or SDK, be …Run Code Online (Sandbox Code Playgroud) 在为 pcl 项目运行 CMake 时,我收到一条警告消息:
-- Configuring done
CMake Warning at CMakeLists.txt:12 (add_executable):
Cannot generate a safe linker search path for target
handgenerator_output_to_pcd because files in some directories may conflict
with libraries in implicit directories:
link library [libboost_system.so] in /usr/lib/x86_64-linux-gnu may be hidden by files in:
/usr/local/lib
link library [libboost_filesystem.so] in /usr/lib/x86_64-linux-gnu may be hidden by files in:
/usr/local/lib
link library [libboost_thread.so] in /usr/lib/x86_64-linux-gnu may be hidden by files in:
/usr/local/lib
link library [libboost_date_time.so] in /usr/lib/x86_64-linux-gnu may be hidden by …Run Code Online (Sandbox Code Playgroud) 我愿意在Qt Quick Controls 2和C ++中的CMake项目中使用样式。而且我很难使颜色正确。
C ++,qml和样式代码来自qt博客,并且只要我使用.pro项目文件,它就可以正常工作,但是当我转向CMakeLists.txt时,我无法正确设置颜色(我相信它们是默认的颜色深色/紫色,而不是深色/橙色)。
在.pro项目中,我的main.cpp如下所示:
#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QQuickStyle>
int main(int argc, char *argv[])
{
QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
QGuiApplication app(argc, argv);
QQuickStyle::setStyle("Material");
QQmlApplicationEngine engine;
engine.load(QUrl(QLatin1String("qrc:/main.qml")));
return app.exec();
}
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我的qml.qrc文件看起来像这样:
<!DOCTYPE RCC>
<RCC>
<qresource prefix="/">
<file>main.qml</file>
<file>CustomLabel.qml</file>
<file>PageBackground.qml</file>
<file>SideBar.qml</file>
<file>SideBarForm.ui.qml</file>
<file>Light.qml</file>
<file>LightForm.ui.qml</file>
<file>Heating.qml</file>
<file>HeatingForm.ui.qml</file>
<file>Security.qml</file>
<file>SecurityForm.ui.qml</file>
<file>qtquickcontrols2.conf</file>
</qresource>
</RCC>
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和我的qtquickcontrols2.conf文件是这样的:
[Controls]
Style=Material
[Universal]
Theme=Dark
Accent=DeepOrange
[Material]
Theme=Dark
Accent=DeepOrange
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现在,我的CMake项目文件夹包含完全相同的文件(实际上是.pro项目文件夹的副本和粘贴),除了我删除了.pri和.pro文件,现在它包含一个CMakeLists.txt …
cmake ×7
c# ×2
c++ ×2
async-await ×1
asynchronous ×1
clang ×1
libxml2 ×1
linker ×1
lld ×1
makefile ×1
qt5 ×1
xml-parsing ×1
xpath ×1