parameters

问题 This answer is helpful, but I would like to know how to pass multiple parameters of different types to the ODE model, perhaps in a struct. For my immediate use case, I need to be able to pass one std::array<double, 6> , two std::vector<std::vector<double>> and two two double scalars for a total of four parameters to be passed. In the linked example, as well as in harmonic_oscillator.cpp, there is only a single double passed parameter. Thanks. Here's an example of the struct I would need

问题 What I'm trying to do is to write a dedicated method for my StreamWriter instance, rather than make use of it at random points in the program. This localises the places where the class is called, as there are some bugs with the current way it's done. Here is what I have at the moment: public static void Write(string[] stringsToWrite) { writer = new StreamWriter(stream); writer.Write("hello"); foreach (string stringToWrite in stringsToWrite) { writer.Write(" " + stringToWrite + " "); } writer

问题 I got this: <a4j:commandLink action="#{searchBean.someMethod}" reRender="search"><span><h:graphicImage value="/home/img/icons/red.gif" width="12" height="12" /> Street</span></a4j:commandLink> And on my Bean, I got a method: public void someMethod(String string){ doStruff(); } Is it possible to send a String as parameter to my method? 回答1: You can send param with <f:param> like this <a4j:commandLink action="#{searchBean.someMethod}" reRender="search"> <span> <h:graphicImage value="/home/img

问题 This question already has answers here : Non-type template parameters (4 answers) Closed 12 months ago . In c++17 we got auto template parameters. I was trying to use one to pass an object in this question: Can I Write Relational Operators in Terms of Arithmetic Operations? But directed by AndyG's comment I found that didn't compile :( Given the template function: template <auto T> void foo() There seem to be restrictions on what I can pass as a template parameter. For example, as seen in my

问题 I try the following code: ProcedureCall call = ss.createStoredProcedureCall("servicos.CLASSIFIER_MAP"); call.registerParameter( 1, String.class, ParameterMode.IN).bindValue(classifierString); call.registerParameter( 2, Long.class, ParameterMode.IN ).bindValue(totalRows); Sometimes the variable totalRows is null and an error appears WARN: SQL Error: 17041, SQLState: 99999 Error calling CallableStatement.getMoreResults It is possible to send null values into a ProcedureCall in hibernate? 回答1:

问题 I've written a simulation program in C++ and like to find parameters in R, using DEoptim. Sometimes everything works well and sometimes DEoptim stops and tells: Error in DEoptim(simulate, lower = lb, upper = ub, control = opt) : NaN value of objective function! Perhaps adjust the bounds. My R-script defines a function that calls the external binary. The parameters are attached to the command. I tested my C++ program and have never seen NaN's returned. Further, to investigate I check for NaN's

问题 I have a couple of structures that summed up exceed the 256 bytes size allowed to be passed as parameters in a kernel call. Both structures are already allocated and copied to device global memory. 1) How can I make use in the same kernel of these structures without being passed as parameters? More details. Separately, these structures can be passed as parameters. For example, in different kernels. But: 2) How can I use both structures in the same kernel? 回答1: As Robert Crovella suggested in

问题 I'd like to understand the parameter max_iter from the class sklearn.cluster.KMeans. According to the documentation: max_iter : int, default: 300 Maximum number of iterations of the k-means algorithm for a single run. But in my opinion if I have 100 Objects the code must run 100 times, if I have 10.000 Objects the code must run 10.000 times to classify every object. And on the other hand it makes no sense to run several times over all objects. What is my misconception and how do I have to

问题 The scandir() function scans the directory dir, calling select() on each directory entry as "int(*filter)(const struct dirent *)" How can I pass pattern value as parameter to fnmatch(const char *pattern, const char *string, int flags) function used in filter ? Here my sample code int my_selectgrf(const struct dirent *namelist) { int r = 0; char my_pattern[] = "*.grf"; r = fnmatch(my_pattern, namelist->d_name, FNM_PERIOD); return (r==0)?1:0; } scandir("/pub/data/grf", &namelist, my_selectgrf,

问题 I am a beginner in Python, and I would like to add a parameter to a callback, in addition to the self and the event. I have tried with lambda, but without success. My code at the moment looks like this : control = monitor(block, callback=self.model) And my model is : def model(self, transaction) I would like to have : def model(self, file, transaction) file being a string parameter I would like to pass to my "model" I tried by changing the control line in : control = monitor(block, lambda