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Unable to cast object of type 'System.DBNull' to type 'System.String`
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answered May 15 '09 at 20:25
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How do I erase an element from std::vector by index?
... a single element, you could do:
std::vector<int> vec;
vec.push_back(6);
vec.push_back(-17);
vec.push_back(12);
// Deletes the second element (vec[1])
vec.erase(vec.begin() + 1);
Or, to delete more than one element at once:
// Deletes the second through third elements (vec[1], vec[2])
ve...
Can I load a .NET assembly at runtime and instantiate a type knowing only the name?
...teInstance to create an instance of your preferred type. You'll need to look the type up first using reflection. Here is a simple example:
Assembly assembly = Assembly.LoadFrom("MyNice.dll");
Type type = assembly.GetType("MyType");
object instanceOfMyType = Activator.CreateInstance(type);
Updat...
How do I force my .NET application to run as administrator?
...'ll want to modify the manifest that gets embedded in the program. This works on Visual Studio 2008 and higher: Project + Add New Item, select "Application Manifest File". Change the <requestedExecutionLevel> element to:
<requestedExecutionLevel level="requireAdministrator" uiAccess="fa...
Trying to add adb to PATH variable OSX
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Why are you trying to run "./adb"? That skips the path variable entirely and only looks for "adb" in the current directory. Try running "adb" instead.
Edit: your path looks wrong. You say you get
/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/Libs/andr...
How to draw vertical lines on a given plot in matplotlib?
Given a plot of signal in time representation, how to draw lines marking corresponding time index?
6 Answers
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Calling clojure from java
...g to a jar and calling the internal methods. There do seem to be a few tricks to make it all work though. Here's an example of a simple Clojure file that can be compiled to a jar:
(ns com.domain.tiny
(:gen-class
:name com.domain.tiny
:methods [#^{:static true} [binomial [int int] double]]...
Why is “using namespace std;” considered bad practice?
...ed Foo and Bar:
using namespace foo;
using namespace bar;
Everything works fine, and you can call Blah() from Foo and Quux() from Bar without problems. But one day you upgrade to a new version of Foo 2.0, which now offers a function called Quux(). Now you've got a conflict: Both Foo 2.0 and Bar i...
Compiling/Executing a C# Source File in Command Prompt
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CSC.exe is the CSharp compiler included in the .NET Framework and can be used to compile from the command prompt. The output can be an executable ".exe", if you use "/target:exe", or a DLL; If you use /target:library, CSC.exe is found in the .NET Framework directory,
e.g. for .NET ...
#ifdef #ifndef in Java
I doubt if there is a way to make compile-time conditions in Java like #ifdef #ifndef in C++.
8 Answers
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