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可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: This question already has an answer here: Is #pragma once a safe include guard? 14 answers Modern C and C++ compilers support the non-standard #pragma once , preprocessor directive, which serve a similar purpose to the classic header guards: #ifndef hopefully_unique_identifier_that_doesnt_hurt_the_code #define hopefully_unique_identifier_that_doesnt_hurt_the_code // some code here #endif One problem, I'm aware of, with the classic approach is that once you've included a header, you have to #undef the header guard macro to include it again

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: How to read location only once with locationManager (GPS and NETWORK PROVIDER) and not any more looking for updates of location, to save battery? 回答1: Although requestSingleUpdate() is the technically correct answer, you should use locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 1, mLocationListener); Wait for a while after getting your first location. The location tends to wobble for a few seconds. To determine if the fix is stable use, location.getAccuracy() . Once the accuracy stabilizes, call locationManager

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: When I create a Excel 2010 Add-in project in Visual Studio 2010, and configure my prerequisite publish options for click once deployment, the 'Microsoft Visual Studio 2010 Tools for Office Runtime (x86 and x64) option item, has a warning indicator over the icon, which screen tip says "Prerequisite could not be found for bootstrapping". Once I try to publish, it publishes fine, however, I get the warning: "Item 'Microsoft.VSTORuntime.4.0' could not be located in 'C:\Program Files\Microsoft SDKs\Windows\v8.0A\Bootstrapper\'." I've tried re

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am getting this error message when using EF 4.1 code first approach with Sql compact 4. I don't see any model who has id column more than one so i have no idea why this error occured. What can cause this error ? Edit : I want to specifiy few extra things. Database creating is success but model creating is not. And Exception has been thrown from sqlce methods. 回答1: This issue stems from a SQL query that returns two or more columns that have an identical name. SQL will handle exact duplicate names on columns with no problem but c# will puke

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am having a hard time with facebook's SDK documentation. I downloaded the SDK from Github and added it into my PHP project. Here is the file system: here is my code so far: use Facebook\FacebookSession; use Facebook\FacebookRequest; use Facebook\GraphUser; use Facebook\FacebookRequestException; FacebookSession::setDefaultApplication('*******','******'); $helper = new FacebookRedirectLoginHelper('http://isgeek.eu/fb/FaRepost/return.php'); $loginUrl = $helper->getLoginUrl(); // Use the login url on a link or button to redirect to Facebook

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am receiving this error in XCode 6.3.2: Loop will run at most once (loop increment never executed) I have tried for (int prob = 0; prob < response; prob++) and received the same error. #include <iostream> #include <cstdlib> #include <ctime> using namespace std; int main() { unsigned seed; int randa, randb, answer, correct; seed = static_cast<unsigned int>(time(0)); srand(seed); while (true) { int response = ' '; cout << "How many equations would you like to do? \n"; cin >> response; for (int prob = response; prob > 0; prob--) { cout <<

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: It seems that mouseup events are only fired when they are not in conjunction with a mousemove. In other words, push down on the left mouse button and let go, and mouseup is fired. But if you drag across the image and then let go, no mouseup is fired. Here is an example that shows this behavior: If you load this, and click and let go, "UP" will alert. However, if you drag and then let go, no UP is fired. How can I have mouseup fire when mousemove is completed, or how can I inspect the mousemove event to determine that the left mouse button is

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I'm using Solr 4.2, and I am trying to call SolrEntityProcessor as a sub-entity . So far, only one call is made to Solr and a single document is indexed while all others are ignored. This should be possible, but it doesn't seem to work... Any ideas? Code snippist: 回答1: I've just found my answer in this Solr JIRA issue . Tested and working as expected! The solution is to use the patched SolrEntityProcessor attached to the issue instead of the one included in the DataImportHandler JAR. Note that you will need it for any Solr version

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: c:\libapiai-master\libapiai-master\build\examples>mingw32-make install mingw32-make install [ 5%] Built target indent_stream_library [ 10%] Built target cJson [ 12%] Building CXX object apiai/CMakeFiles/apiai.dir/src/AI.cpp.obj C:\libapiai-master\libapiai-master\apiai\src\AI.cpp:1:0: warning: -fPIC ignored for target (all code is position independent) [enabled by default] #include <apiai/AI.h> ^ C:\libapiai-master\libapiai-master\apiai\src\AI.cpp: In static member function 'static ai::Service& ai::AI::sharedService()': C:\libapiai-master

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I need to load a local file in a WKWebView. I'm using the new ios9 method - (nullable WKNavigation *)loadFileURL:(NSURL *)URL allowingReadAccessToURL:(NSURL *)readAccessURL It works perfectly for the first load (navigation delegation is properly called), but if I try to load a new and different file, it does nothing. The URL for the currentItem in the wkwebview instance is modified. But if I force a reload the delegate method didFinishNavigation is called with the previous set URL. I also tried to navigate forward but the file that was