warnings

问题 We know that calling Rf_error() should be avoided in Rcpp as it involves a longjmp over C++ destructors on the stack. This is why we rather throw C++ exceptions in Rcpp code (like throw Rcpp::exception("...") or via the stop("...") function). However, R warnings may also result in a call to Rf_error() (this behavior depends on the warn option). So, a call to Rf_warning() is also risky. Rcpp::sourceCpp(code = ' #include <Rcpp.h> using namespace Rcpp; class Test { public: Test() { Rcout <<

问题 When I launch my Android app with Eclipse, the usual window "Android Device Chooser" appears. I can here choose on which device I want to run my app. In the target column appears next to my target an orange triangle with an exclamation mark (kind of 'warning') (see the image below) Does somebody know what it means ? 回答1: According to this mailing list thread, that just means you're utilising an optional library and Eclipse can't be sure it's installed on the device. Eclipse knows you're using

问题 In my C++11 code I get the clang warning "Declaration requires an exit-time destructor" in the following case: static const std::map<int, const someStruct> mymap = { {1, { "A", "B", "C" }}, {2, { "D", "E", "F" }} }; As far as I understand Google an "exit-time destructor" is required to destroy main() and statics in a deterministic way to prevent crashes on exit due to "already released variables". Is that right? Can someone explain it better? Plus: What can I do about it (I don't want to

问题 I am getting the above mentioned error: 'Reloaded modules: <module_name>' Since I want to keep my code as it is, i'd like to disable this warning. How can this be done? I am using Spyder 3.2.3. 回答1: Go to Tools -> Preferences -> Python Interpreter and you will find User Module Reloader. Just deselect the checkbox with text as Show reloaded module list. 回答2: In spyder 2.3 you need to do the following: Go to Tools -> Preferences -> Console -> Advanced settings then scroll down to: desellect

问题 apologies in advance if i use poor terminology. when i compile a C++ app under gdb and use printf() it gives me awesome warnings relating to the consistency of the format string and the arguments passed in. eg, this code: printf("%s %s", "foo"); results in a compiler warning "too few arguments for format", which is super-useful. it will also give warnings about format string type vs. argument type. it must have inspected the format string and compared that against the supplied argument types.

问题 I am getting these two thread warnings compiling on an iPhone (iOS 6): THREAD WARNING: ['InAppBrowser'] took '260.519043' ms. Plugin should use a background thread. THREAD WARNING: ['Geolocation'] took '110.953857' ms. Plugin should use a background thread. this is how I call the plugins in my code: window.open("http://www.anaddress.com", '_system'); and this is how my config.xml looks like: <?xml version='1.0' encoding='utf-8'?> <widget id="my.id" version="0.0.1" xmlns="http://www.w3.org/ns

问题 I am getting these two thread warnings compiling on an iPhone (iOS 6): THREAD WARNING: ['InAppBrowser'] took '260.519043' ms. Plugin should use a background thread. THREAD WARNING: ['Geolocation'] took '110.953857' ms. Plugin should use a background thread. this is how I call the plugins in my code: window.open("http://www.anaddress.com", '_system'); and this is how my config.xml looks like: <?xml version='1.0' encoding='utf-8'?> <widget id="my.id" version="0.0.1" xmlns="http://www.w3.org/ns

问题 I am starting to use RStudio notebooks, and I am still trying to understand how some of the things work. I do not understand why some produced warning messages are kept and appear when executing code that is completely unrelated to the message. For instance, I have a document with several chunks, where the last of them produces the warning > warnings() Warning messages: 1: Unknown or uninitialised column: 'perc.goal.met.period'. 2: Unknown or uninitialised column: 'perc.goal.met.period'. 3:

问题 In git if you checkout a commit directly you get a big fat warning starting with: "You are in 'detached HEAD' state. You can look around ..." It's fine - I intend to be in detached HEAD state. However I am using this in a script and I don't want this warning in the output logs but I do want the normal output. My "ugly" workaround now is to run the same command twice, first with -q to hide the warning, and one more time to get the normal output: HEAD is now at deadbeef... Message since the

问题 It is considered good practice to enable GHC warnings with -Wall . However, I've found out that fixing those warnings has a negative effect for some types of code constructs. Example 1: Using the do-notation equivalent of f >> will generate a warning if I don't explicitly use the _ <- f form: Warning: A do-notation statement discarded a result of type Char. Suppress this warning by saying "_ <- f", or by using the flag -fno-warn-unused-do-bind I understand that I can forget to do something