debugging

问题 I've already got help here and here with my Web API, but now I think I've arrived to the edge of a Grand Canyon... Fortunately my execution by my boss was postponed, but sentence was not yet commuted. So any suggestions appreciated wholeheartedly, especially since my newbie status in the stuff hasn't yet changed. So, the code is as shown in second linked question (can post it here, but I think it would be redundant). I've corrected errors with SQL link, so it now doesn't crash when trying to

问题 I set up my javaagent in the like this: -javaagent:/usr/pkg/tomcat/lib/aspectjweaver-1.7.3.jar But it does not work, so I would be interested to have a look at the logs. What can I add to javaagent if I want to get log messages? (stacktrace, which classes were loaded etc...) I beleive "options" should be used for this. The documentation says: implementations with a command-line interface, an agent is started by adding this option to the command-line: -javaagent:jarpath[=options] jarpath is

问题 I would like to implement certain rules into relationship between my turtles and my patches. My Patches variables are: n_min - if there is enough turtles, change pcolor to pink, change yellow turtles on patch to orange n_max - if there is too many turtles, set pcolor to brown, let all turtles to avoid this patch My turtles states are: yellow (move) -> orange (stay) -> red (infest) Patches states are: green (n_min< then number of orange turtles on one patch) pink (number of orange turtles is >

问题 I made a simple hello world program. I clicked on "Start Debugging" and the window showed "Project is out of date. Would you like to build it?" As I click on "yes", the next window shows "There were build errors. Would you like to continue and run the last successful build?". I choose yes again, and it shows this window: (attached screenshot)enter image description here 回答1: There were build errors. Would you like to continue and run the last successful build? The only correct answer to that

问题 This question already has answers here : What is the best way to toggle python prints? (6 answers) Closed 4 years ago . I have 10 or 15 very useful debugging print statements sprinkled throughout my program (in different functions and in main ). I won't always want or need the log file though. I have a config file in which I could add a parameter to toggle print statements on or off. But then, I'd have to add a guard check for the value of this parameter above every print statement. What are

问题 I try to find something that could help me but nothing was good so far. I would like to know if there is any option to comment some lines of code while i start building/debugging? I don't want to do it manually ("edit and continue" manually isn't a solution). I want "tell VS" to automatically comment specified line of code if i start to build or debug. I need this line of code when i am testing app at server, but when i do it locally i have to have it commented. Hope you understand my problem

问题 Whenever I call SetTitle() in my MFC application, I get a debug assertion failed. But I haven't set to assert anything; in truth I'm not really sure how to explain what's going on. I actually get three debug assertions that loop round continuously about a dozen times before the application continues. If I keep clicking "Ignore" then after about 20 clicks the boxes go away and the applciation continues running as normal. The first two assertions are thrown from wincore.cpp lines 952 and 954.

问题 var quadraticFormula = function(a, b, c) { console.log((-b + sqrt( (b*b) - 4 * a * c)) / 2a) }; quadraticFormula(2,2,2) I am a beginner trying to make a simple quadratic equation calculator on javascript. I keep on getting a syntax error message saying "missing ) after argument list". What is wrong with my code? 回答1: Try adding a * sign in 2a : var quadraticFormula = function(a, b, c) { console.log((-b + Math.sqrt( (b*b) - 4 * a * c)) / (2*a)); }; Also sqrt is part of Math so invoke it with

问题 I'm developing an android app. I'm using ZXING fragment open source barcode scanning. I have an option to manually input the barcode. So when the user press the manual input button I open a dialog with edit text. Before the dialog appears I pause the camera and scanning. This causes the device to hang, the top bar multiples it self adding it self more and more times until it fills the display. The only way to get out of this situation is to restart the device. This bug only reproduce in Nexus

问题 While testing a program I hit a segmentation fault which dumped the required core. I'm using gdb to debug a core file as: gdb /path/to/exec path/to/core I realized after looking at the core file (and the source code) that the issue is actually a NULL pointer dereference that happened while using the "strcmp" function. However, the core-file backtrace gives the below error message: Program terminated with signal SIGSEGV, Segmentation fault. #0 __strcmp_sse2_unaligned () at ../sysdeps/x86_64