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How to sort List of objects by some property
...
Using Comparator
For Example:
class Score {
private String name;
private List<Integer> scores;
// +accessor methods
}
Collections.sort(scores, new Comparator<Score>() {
public int compare(Score o1, Score o2) {
// compare two ins...
Equivalent of typedef in C#
... using MyClassDictionary = System.Collections.Generic.Dictionary<System.String, MyNamespace.MyClass>; Is it correct? Otherwise it doesn't seem to consider the using definitions above it.
– tunnuz
Apr 23 '10 at 10:04
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Should functions return null or an empty object?
...n exception.
Note that if the function was called UserEntity GetUserByName(string name) it would probably not throw but return null. In both cases returning an empty UserEntity would be unhelpful.
For strings, arrays and collections the situation is usually different. I remember some guideline for...
Stop Excel from automatically converting certain text values to dates
...luate the expression following it. In this case the expression is simply a string literal and the value of a string literal is the content of the string. Thus the quotation marks magically disappear. You can put =1+2+3 and get the value 6 after CSV import. The formula itself is not destroyed in the ...
How can I find the length of a number?
...
var x = 1234567;
x.toString().length;
This process will also work forFloat Number and for Exponential number also.
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INotifyPropertyChanged vs. DependencyProperty in ViewModel
...erties and cringe at the thought of INotifyPropertyChanged. Apart from the string property names and possible memory leaks due to event subscription, INotifyPropertyChanged is a much more explicit mechanism.
Dependency properties imply "when this, do that" using easily-understood static metadata. I...
How to view the Folder and Files in GAC?
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Install:
gacutil -i "path_to_the_assembly"
View:
Open in Windows Explorer folder
.NET 1.0 - NET 3.5: c:\windows\assembly (%systemroot%\assembly)
.NET 4.x: %windir%\Microsoft.NET\assembly
OR gacutil –l
When you are ...
Java Hashmap: How to get key from value?
If I have the value "foo" , and a HashMap<String> ftw for which ftw.containsValue("foo") returns true , how can I get the corresponding key? Do I have to loop through the hashmap? What is the best way to do that?
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Is there a conditional ternary operator in VB.NET?
...Here's some more info: Visual Basic If announcement
Example:
Dim foo as String = If(bar = buz, cat, dog)
[EDIT]
Prior to 2008 it was IIf, which worked almost identically to the If operator described Above.
Example:
Dim foo as String = IIf(bar = buz, cat, dog)
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Best practice to return errors in ASP.NET Web API
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public class NotFoundWithMessageResult : IHttpActionResult
{
private string message;
public NotFoundWithMessageResult(string message)
{
this.message = message;
}
public Task<HttpResponseMessage> ExecuteAsync(CancellationToken cancellationToken)
{
var...