wrapper | 易学教程

How to check if php://input is set?

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问题 I need to check if php://input exists/isset. Does it work with php isset() ? What is the proper way to check it? 回答1: Try to test it with file_get_contents() (for reading) + empty() or boolean conversion (for testing): <?php $input = file_get_contents('php://input'); if ($input) { // exists } else { // not exists } From php.net: Note: Prior to PHP 5.6 , a stream opened with php://input could only be read once; the stream did not support seek operations. However, depending on the SAPI

OpenCV 3.2 for python with CUDA in Windows

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问题 I build opencv3.2 with cmake and Visual Studio 12 (2013) with CUDA support and python3.5 . All the libraries were build successfully and I can run opencv commands with python . Here is the output from the command print(cv2.getBuildInformation()) General configuration for OpenCV 3.2.0 ===================================== Version control: unknown Extra modules: Location (extra): D:/OpenCV/opencv_contrib/modules Version control (extra): unknown Platform: Timestamp: 2017-06-09T14:07:41Z Host:

Cython cdef Class not displaying doc string or init parameters

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I have used cdef to define a python class which wraps a C++ class with Cython and it works correctly. However when I use help(class) in python or class? in ipython I get something like the following: >>> TestClass.CTestClass? Init signature: TestClass.CTestClass() Docstring: <no docstring> File: ~/Coding/CythonWithCppTutorials/ClassCythonCPPWithMemberFunctions/TestClass.so Type: type Which does not display any doc-string or init signature, which I would like to have displayed, how could I get it to display this? The Cython wrapper is as follows: TestClass.pyx import cython import numpy as np

wrapper to c++/cli

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What is the basic structure of a wrapper to c++/cli so it can be called from c# ? A wrapper for a C++ class Blah: EDIT: ref class BlahWrapper { BlahWrapper () { blah = new Blah(); } !BlahWrapper() { //Destructor called by GC if (blah != null) { delete blah; blah = null; } } ~BlahWrapper() { //Dispose() called in "using" blocks, or manually dispose if (blah != null) { delete blah; blah = null; } } private: Blah* blah; } 来源： https://stackoverflow.com/questions/4985907/wrapper-to-c-cli

What is the need of an intValue() method if wrappers use unboxing?

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问题 For example, look at this code: Integer myInt = new Integer(5); int i1 = myInt.intValue(); int i2 = myInt; System.out.println(i1); System.out.println(i2); As you can see, I have two ways of copying my integer value from the wrapper to the primive: I can use unboxing OR I can use the method intValue() So... what's the need of having a method when there is already unboxing? 回答1: Unboxing was introduced in Java 5. The wrappers (including this method) have been there since the original release. A

Benefits of Log4j singleton wrapper?

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问题 I have recently inherited some Java code and need to integrate it into a project that I am working on. My project is a service agent that processes and transforms XML messages. While looking through the new code, I discovered the following logging class: import org.apache.log4j.BasicConfigurator; import org.apache.log4j.Level; import org.apache.log4j.Logger; public class MyLogger { private static MyLogger instance = null; protected final static Logger log = Logger.getLogger(MyLogger.class);

Wrapping class with pure virtual methods

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问题 I have an unmanaged dll which contains a class with pure virtual methods only (kind of callbacks): class PAClient { public: __declspec(dllexport) virtual void SetCalculationStarted() = 0; __declspec(dllexport) virtual void SetCalculationStopped() = 0; } Now I have to send these function calls to the managed C# code and decided to use interface for that. This is what I've done: public interface class IPAClientWrapper { void SetCalculationStarted(); void SetCalculationStopped(); }; private

How can I track the values of a local variable in Python?

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问题 My algorithm loops over seconds of data. For each second-worth-of-data, I return a value, that is the result of a fairly involved computation involving multiple submodules and subclasses. Some of these classes are re-initialized each second. For debugging purposes, a few times I have been in the situation that I have wanted to plot the value of a certain local variable in one of these classes over time. Something external would have to serialize and log the values, because the class exists

Wrapping of function in the same file

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问题 I need your suggestion to wrap my existing function. I am from testing team I need to write unit test cases, so I don't want to depend on original definition so trying to write my own definiton. Following is the source code which should not be changed. source.c: #include <stdio.h> const char *getObjectName (int *anObject); void func() { int *p; getObjectName(p); } const char *getObjectName (int *anObject) { printf("i am in original\n"); } From the above code I want to wrap getObjectName()

wrapper to c++/cli

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问题 What is the basic structure of a wrapper to c++/cli so it can be called from c# ? 回答1: A wrapper for a C++ class Blah: EDIT: ref class BlahWrapper { BlahWrapper () { blah = new Blah(); } !BlahWrapper() { //Destructor called by GC if (blah != null) { delete blah; blah = null; } } ~BlahWrapper() { //Dispose() called in "using" blocks, or manually dispose if (blah != null) { delete blah; blah = null; } } private: Blah* blah; } 来源： https://stackoverflow.com/questions/4985907/wrapper-to-c-cli