Making it happen
andrei
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Posts by andrei
Linq Join Two Lists side-by-side
Sep 19th
Easy: Enumerable.Range( 0, list1.Count).Select( i => list1[i] + ” – ” + list2[i])
Semaphore Pool
Sep 19th
It seems that there’s nothing in .NET similar to MsgWaitForMultipleObjects, I needed a semaphore list with the ability to wait for an item to be released (and to get that semaphore’s index). The closest thing I did was a loop to wait for each semaphore a time slice, however it’s far from optimal. Still looking into it.
Viruses
Sep 19th
It’s the first time my PC got infected in a loooong time, I fought them with HijackThis but in the end I found a better solution, that is, ComboFix.
Adobe Switchboard
Sep 5th
… does a good job at controlling Adobe Photoshop from Air, too bad that sometimes random messages get lost 
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Destination Alpha in Alpha Blending
Aug 29th
Everyone knows that c0 = cd*(1-a)+cs*a for color channels, but how do you compute the final alpha channel ? Using the same equation means a0=ad*(1-a)+a*a that may not be what you would expect, for example if you have full opaque destination you may end up with a translucent image a0 < 1.
By reverse engineering of Paint.NET (and Photoshop) I came with a0 = ad*(1-a)+1*a, that is an additive blending for alpha. While I have found no real explanation why to use this formula, I had to. Oh and BTW, ActionScript’s BitmapData.copyPixels blends like crap, you’d better code your own alpha blending.
Update: Well, the correct alpha blending equations are: a0 = a+ad*(1-a) and c0 = (cd*ad*(1-a)+cs*a) / a0, from Wikipedia.
Unwrap Mosaics by Microsoft
Aug 27th
Sql Server Management Studio 2008 Intellisense
Aug 23rd
It seems to work nice but … only on Sql Server 2008 connections! This really sucks 
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Trojan Written in Java !?
Aug 22nd
It’s not a joke, I got my hands on one . And, yes, it has a simple Win32 stub exe that checks for JVM and installs it if not found.
Power Outage Corrupts SQL Server Database
Aug 15th
I could have bet on anything that SQL Server has atomic disk writes so no crash can possibly corrupt anything, well, after a power outage I had a database marked as (Suspect) by the recovery. The only way to actually get it back running was DBCC with REPAIR_ALLOW_DATA_LOSS that indeed has lost an entire table full of data along with some other fields around.
EntityFramework and Oracle
Aug 15th
Using this provider http://code.msdn.microsoft.com/EFOracleProvider it’s easy to change you model to use Oracle instead of SQL Server – only change the column types (for example from nvarchar to nvarchar2 etc). Unfortunately the provider then throws a bizarre error, you can see it in the comments.
