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问题 Given a WinAPI function which returns it's result via a C style string OUT parameter e.g.: int WINAPI GetWindowTextW( _In_ HWND hWnd, _Out_ LPTSTR lpString, _In_ int nMaxCount ); Is there a better way of using the function than what I'm doing below? HWND handle; // Assume this is initialised to contain a real window handle std::wstring title; wchar_t buffer[512]; GetWindowTextW(handle, buffer, sizeof(buffer)); title = buffer; The above code works, but I have the following issues with it: The

问题 I'm using WebLogic 9.2. I found an option in the Admin Server web page to send standard out to the server log files. I would like the same for standard error, but I can't find an option for it in the Admin Server web page. I haven't found Oracles documentation very clear. Do I need to set this option by hand in a config file somewhere and if so where and how? Thanks in advance 回答1: If you are using 'RedirectStdoutToServerLogEnabled' feature as described in http://download.oracle.com/docs/cd

问题 Hi I am trying to store the output of a command run through a spawn ssh remote window into my local host, I am new to expect and am not able to figure out where I am wrong. My Code: #!/bin/bash while read line do /usr/bin/expect <<EOD spawn ssh mininet@$line expect "assword:" send -- "mininet\r" set output [open "outputfile.txt" "a+"] expect "mininet@mininet-vm:*" send -- "ls\r" set outcome $expect_out(buffer) send "\r" puts $output "$outcome" close $output expect "mininet@mininet-vm:*" send

问题 I have activity that parses XML feed (with news) and loads parsed data (text and image url) in WebView's, which are inside gallery widget. Something like this: mimeType = "text/html"; encoding = "utf-8"; String html = "<img src=\"" + newsImageUrl.get(position) + "\" style=\"max-width:200px; max-height:200px;\" align=\"left\"" + "/>" + newsDescription.get(position); data.loadDataWithBaseURL("", html, mimeType, encoding, ""); Everything works fine, but sometimes inside news feed there is this

问题 Need some references to better understand the out parameter (and the '%' operator used) when interfacing C# with C++/CLI. Using VS2012 and this msdn reference:msdn ref C++ DLL code compiled with /clr #pragma once using namespace System; namespace MsdnSampleDLL { public ref class Class1 { public: void TestOutString([Runtime::InteropServices::Out] String^ %s) { s = "just a string"; } void TestOutByte([Runtime::InteropServices::Out] Byte^ %b) { b = (Byte)13; } }; } And the C# code: using System;

问题 I often see methods like this in C#: (doing a computation that may or may not give a result) bool TrySomething(SomeType inputData, out SomeOtherType result) { ... } Why people don't use instead something like this? Nullable<SomeOtherType> TrySomething(SomeType inputData) { ... } Is it just performance difference? This is a struct , so there must be no heap allocation, right? Or I have missed something? 回答1: Nullable was introduced - like generics - in C# 2.0. There is a lot of code that

问题 I'm having the following static C# method public static bool TryParse (string s, out double result) which I would like to call from Python using the Python NET package. import clr from System import Double r0 = Double.IsNaN(12.3) # works r1, d1 = Double.TryParse("12.3") # fails! TypeError: No method matches given arguments. This works in IronPython. d2 = 0.0 r2, d2 = Double.TryParse("12.3", d2) # fails! TypeError: No method matches given arguments Any idea? Update I found the following answer

问题 Is there a way to change flash players audio output device? if not, is there a swf player who has this possibility? Thanks! 回答1: I had an issue until a few minutes ago regarding this. Two audio devices are available to my XP box: an iMic USB audio I/O device, in which I have permanently plugged my desktop speakers; and a pair of USB headphones with microphone that I plug in occasionally. The USB headset would take precedence over the USB iMic for applications because apps appear to access the

问题 I am new to C#. I've tried this with out parameter in C# using System; using System.Collections.Generic; using System.Linq; using System.Text; class First { public void fun(out int m) { m *= 10; Console.WriteLine("value of m = " + m); } } class Program { static void Main(string[] args) { First f = new First(); int x = 30; f.fun(out x); } } but i get some errors like " Use of unassigned out parameter 'm'" and The out parameter 'm' must be assigned to before control leaves the current method.

问题 I have a simple python (2.7) script that should execute few svn commands: def getStatusOutput(cmd): print cmd p = subprocess.Popen([cmd],stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True) output, status = p.communicate() return status, output svn_cmd = [ ["svn co " + FIRMWARE_URL + "/branches/interfaces/ interfaces --depth empty", ""], ["svn up interfaces/actual_ver.txt", " Getting current version of a branch "] ] status, output = getStatusOutput(svn_cmd[0][0]) Unfortunately when it