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How to remove all event handlers from an event
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I found a solution on the MSDN forums. The sample code below will remove all Click events from button1.
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
button1.Click += button1_Click;
button1.Click += button1_Click2;
button2.Clic...
When should I make explicit use of the `this` pointer?
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Usually, you do not have to, this-> is implied.
Sometimes, there is a name ambiguity, where it can be used to disambiguate class members and local variables. However, here is a completely different case where this-> is e...
What is the difference between `after_create` and `after_save` and when to use which?
... readers should note that, according to the docs, ActiveRecord's update_all does not invoke any callbacks, including after_*
– user2426679
Jan 10 at 19:34
add a comment
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C++, Free-Store vs Heap
Dynamic allocations with new/delete are said to take place on the free-store , while malloc/free operations use the heap .
I'd like to know if there is an actual difference, in practice.
Do compilers make a distinction between the two terms? ( Free store and Heap , not new/malloc )
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Match multiline text using regular expression
...erwise they only match at the start/end of the entire string).
Pattern.DOTALL or (?s) tells Java to allow the dot to match newline characters, too.
Second, in your case, the regex fails because you're using the matches() method which expects the regex to match the entire string - which of course d...
Allow user to select camera or gallery for image
...e));
yourIntentsList.add(finalIntent);
}
List<ResolveInfo> listGall = packageManager.queryIntentActivities(gallIntent, 0);
for (ResolveInfo res : listGall) {
final Intent finalIntent = new Intent(gallIntent);
finalIntent.setComponent(new ComponentName(res.activityInfo.packageName,...
How do I get the current username in Windows PowerShell?
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I'd like to throw in the whoami command, which basically is a nice alias for doing %USERDOMAIN%\%USERNAME% as proposed in other answers.
Write-Host "current user:"
Write-Host $(whoami)
share
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What's invokedynamic and how do I use it?
I keep hearing about all the new cool features that are being added to the JVM and one of those cool features is invokedynamic. I would like to know what it is and how does it make reflective programming in Java easier or better?
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Percentage Height HTML 5/CSS
...’, which is the nearest ancestor to also be positioned.)
Alternatively, all modern browsers and IE>=9 support new CSS units relative to viewport height (vh) and viewport width (vw):
div {
height:100vh;
}
See here for more info.
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What does template mean?
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template<void (*F)()>
struct FunctionWrapper {
static void call_it() { F(); }
};
// pass address of function do_it as argument.
void do_it() { }
FunctionWrapper<&do_it> test;
Template reference parameter (passing an integer)
template<int &A>
struct SillyExample {
...