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List vs Set vs Bag in NHibernate
...and Equals to indicate the business definition of duplicate. Can be sorted by defining an orderby or by defining a comparer resulting in a SortedSet result.
Bag: Unordered list of entities, duplicates allowed. Use a .NET ICollection<T> in code. The index column of the list is not mapped and no...
Understanding garbage collection in .NET
...ow the garbage collector discovers local variables and how that's affected by having a debugger present.
First off, the jitter performs two important duties when it compiles the IL for a method into machine code. The first one is very visible in the debugger, you can see the machine code with the ...
Service vs IntentService in the Android platform
...ded (Intent triggered tasks).
How to trigger?
The Service is triggered by calling method startService().
The IntentService is triggered using an Intent, it spawns a new worker thread and the method onHandleIntent() is called on this thread.
Triggered From
The Service and IntentService may be...
How do I increase the scrollback buffer in a running screen session?
...an page explains that you can enter command line mode in a running session by typing Ctrl+A, :, then issuing the scrollback <num> command.
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Sorting an ArrayList of objects using a custom sorting order
...u need to let Contact implement Comparable. Assuming that you want to sort by default on name, then do (nullchecks omitted for simplicity):
public class Contact implements Comparable<Contact> {
private String name;
private String phone;
private Address address;
public int co...
LINQ order by null column where order is ascending and nulls should be last
I'm trying to sort a list of products by their price.
10 Answers
10
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How can I remove duplicate rows?
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Assuming no nulls, you GROUP BY the unique columns, and SELECT the MIN (or MAX) RowId as the row to keep. Then, just delete everything that didn't have a row id:
DELETE FROM MyTable
LEFT OUTER JOIN (
SELECT MIN(RowId) as RowId, Col1, Col2, Col3
F...
Purpose of returning by const value? [duplicate]
...erform a potentially expensive non-const operation on an object, returning by const-value prevents you from accidentally calling this operation on a temporary. Imagine that + returned a non-const value, and you could write:
(a + b).expensive();
In the age of C++11, however, it is strongly advised...
GitHub - List commits by author
Is there any way on GitHub to list all commits made by a single author, in the browser (neither locally, e.g. via git log , nor via the API)?
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Order a List (C#) by many fields? [duplicate]
I want to order a List of objects in C# by many fields, not just by one. For example, let's suppose I have a class called X with two Attributes, A and B, and I have the following objects, in that order:
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