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Unit testing that events are raised in C# (in order)
...Method]
public void Test_ThatMyEventIsRaised()
{
Dictionary<string, int> receivedEvents = new Dictionary<string, int>();
MyClass myClass = new MyClass();
myClass.PropertyChanged += delegate(object sender, PropertyChangedEventArgs e)
{
if (receivedEvents.ContainsK...
Set focus on TextBox in WPF from view model
...perty of the control I want to shift the focus to is tied to a multi-value converter. Apparently, the GotFocus event handler gets called before the multi-value converter does...which means the control, at that point, is disabled, so as soon as GotFocus completes, LostFocus gets called (I guess becau...
Quickly reading very large tables as dataframes
...
@skan the end object is a data frame. So you have to convert it to a zoo object in order to use it with zoo. Look at the examples in the zoo docs for illustrations.
– JD Long
Apr 2 '13 at 12:48
...
How do I create a nice-looking DMG for Mac OS X using command-line tools?
...od -Rf go-w /Volumes/"${title}"
sync
sync
hdiutil detach ${device}
hdiutil convert "/pack.temp.dmg" -format UDZO -imagekey zlib-level=9 -o "${finalDMGName}"
rm -f /pack.temp.dmg
On Snow Leopard, the above applescript will not set the icon position correctly - it seems to be a Snow Leopard bug. O...
Biggest GWT Pitfalls? [closed]
...t into GWT harder
Solution: Again you get used to this, but unfortunately converting a HTML design to a GWT design is always going to be slower than doing something like converting a HTML design to a JSP page.
Problem: GWT takes a bit of getting your head around, and is not yet mainstream. Meani...
What is the difference between the states selected, checked and activated in Android?
...
The difference between Checked and Activated is actually quite interesting. Even the Google documentation is apologetic (emphasis below added):
... For example, in a list view with single or multiple selection
enabled, the views in the current selection set are activated. (Um,
y...
FIND_IN_SET() vs IN()
... (attachedCompanyIDs)
attachedCompanyIDs is a scalar value which is cast into INT (type of companyID).
The cast only returns numbers up to the first non-digit (a comma in your case).
Thus,
companyID IN ('1,2,3') ≡ companyID IN (CAST('1,2,3' AS INT)) ≡ companyID IN (1)
In PostgreSQL, you c...
Should the hash code of null always be zero, in .NET
...n when object's identifier is null?
The "Remarks" of this MSDN entry goes into more detail around the hash code. Poignantly, the documentation does not provide any coverage or discussion of null values at all - not even in the community content.
To address your issue with the enum, either re-imple...
The type 'string' must be a non-nullable type in order to use it as parameter T in the generic type
...le<T> type requires that T is a non-nullable value type, for example int or DateTime. Reference types like string can already be null. There would be no point in allowing things like Nullable<string> so it is disallowed.
Also if you are using C# 3.0 or later you can simplify your code b...
What is the difference between an interface and abstract class?
What exactly is the difference between an interface and abstract class?
37 Answers
37
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