signal

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: When I create a signal and bring it into the scope of a function, its effective retain count is 0 per Cocoa conventions: RACSignal * signal = [ self createSignal ]; When I subscribe to the signal, it retains the subscriber and returns a disposable which, per Cocoa conventions, also has a retain count of zero. RACDisposable * disposable = [ signal subscribeCompleted :^ { doSomethingPossiblyInvolving ( self ); }]; Most of the time, the subscriber will close over and reference self or its ivars or some other part of the enclosing

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 was trying this program from Advance Programming in Unix Environment. #include<stdio.h> #include<signal.h> static void handler(int sig){ if(sig == SIGUSR1) printf("handled user1 signal"); else if(sig == SIGUSR2) printf("handles user2 signal"); else printf("unkown signal"); } int main(){ if(signal(SIGUSR1, handler) == SIG_ERR) printf("can't handle signal SIGUSR1"); if(signal(SIGUSR2, handler) == SIG_ERR) printf("can't handle signal SIGUSR2"); for(;;) pause(); return 0; } I am using Ubuntu 11.10. I compile the program with gcc and then run a

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 have a standalone application in which I have to prompt the user with an confirm dialog box to save the changes made by him when he tries to shutdown the system by start-->shutdown . I came to know that by using signalhandlers we can do it. Can some one help me how to use signal handlers 回答1: Update May 2012 (2 and half years later) Trejkaz comments: On current versions of Java this signal handling code fails because the " INT " signal is "reserved by the VM or the OS". Additionally, none of the other valid signal names actually fire when

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 just used Xcode 7's migration tool to migrate a project from Swift 1.2 to 2. After fixing up errors missed and such, all is well except for an error which prevents me from even building: Command failed due to signal: illegal instruction 4. I have tried the help in these articles ( Xcode 7 and Swift 2.0 : Command failed due to signal: Abort trap: 6 , and Command failed due to signal: Abort trap: 6 ) which are not identical issues to mine, but nevertheless they were not able to fix the issue. I have cleaned the build and removed the derived

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'm running gradlew to compile an Android app that has a static lib dependency. Somehow, I have an undefined reference to bsd_signal . I was able to compile this app with gradle 1.X, but I've been obliged to switch to gradle 2.10 and to drop my Android.mk file in favour of putting more build instruction into my gradle.build file, and this is where the trouble arises. Can anyone tell me whether there is a library that defines bsd_signal , which I should link to my project? Compiler output Starting process 'command '/home/myself/Android/Sdk

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 working on a little app to check the signal strength of various network operators in my area. My current operators signal is quite unstable and I want to look into the strength of other GSM operators. Sofar I've been using the TelephonyManager and a PhoneStateListener with the onSignalStrengthsChanged call back to get the GSM Signal strength of the current network operator, but it seems that this class only gives me info on the signal strength of the network attached to my SIM card. I'm interested in measurement of GSM signal strength

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: Since Xcode 7 and Swift 2.0, I get the error above, like in the screenshot shown here: I have no idea where this is coming from, clean and deleting derived data didn't work. Anyone else experiencing this problem? project: target: 回答1: I have the same problem with all Xcode 6.3 projects, I open in Xcode 7.0. I created a new project, copied all my source files and resources and everything worked without this compiler error. I thought this has something to do with the project settings. I turned off the Swift compile Optimization to "none" and

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 calling a emit signal1() from a non Qt thread. By non Qt thread I mean not from the GUI Event Loop and not from any QThread run() method or any QThread own event loop. It is simply a pthread (pthread_create()) that calls a method of a QObject which emits signals. ex: MyQbject : public QObject { ... void emitBunchOfSignals () { emit signal1 (); emit signal2 (); ... } ... } the "run" method of my pthread which has a pointer to a MyObject instance (instance that was created within the main Qt GUI thread context NOT the pthread)

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 have a very simple Python 3 script: f1 = open ( 'a.txt' , 'r' ) print ( f1 . readlines ()) f2 = open ( 'b.txt' , 'r' ) print ( f2 . readlines ()) f3 = open ( 'c.txt' , 'r' ) print ( f3 . readlines ()) f4 = open ( 'd.txt' , 'r' ) print ( f4 . readlines ()) f1 . close () f2 . close () f3 . close () f4 . close () But it always says: IOError : [ Errno 32 ] Broken pipe I saw on the internet all the complicated ways to fix this, but I copied this code directly, so I think that there is something wrong with the code and not Python's

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 trying to write a very simple Android application that checks the signal strength of the current cell. So far, I have only found something called getNeighboringCellInfo() , but I'm not really sure if that includes the current cell. How do I get the CURRENT cell signal strength in Android? Does getNeighborCellInfo() get the current cell? It doesn't seem like it based on the results that I have been able to get with it. Here's my current code: List<NeighboringCellInfo> n = tm.getNeighboringCellInfo(); //Construct the string String s = "";