(edit 579) Permalink

This RemoteApp Article shows how to setup remote applications, so you can run a program installed on your home computer from far away through Remote Desktop. (edit 578) Permalink

This article: Setting Target Platform to AnyCPU explains how to get Visual Studio setup so that it won't compile to 64 bit. So you can edit the code while debugging. (edit 577) Permalink

I almost never spot it in Regular Expression documentation, but it works in Linux and in PowerShell. The or operator in a regular expression.

"find this string" -match "this|that|other"

In PowerShell, when using the where cmdlet, you use spelled out operators like -eq for ==, and -lt for > (equals and less than). This is not unlike LINQ's where operator. To match string patterns, use regular expressions:

 dir | where {$_.Name -match "^\..*"} 

 dir | where {$_.Name -notMatch "^\..*"}

PS C:\> $a = Get-Item c:\store
PS C:\> $a | Get-Member

The ?? operator is handy. msdn article

int? x = null;
int y = x ?? 99999;

This is the script I've recently started using for backing up my SQL database.

declare @datetimestamp varchar(15) 
declare @bu_command varchar(4000)
declare @del_command varchar(4000)
declare @filename varchar(255)
declare @archive varchar(255)
declare @result int

set @datetimestamp = 
	substring(convert(varchar(32), getdate() ,120),1,4) 
	+ '-' + substring(convert(varchar(32), getdate() ,120),6,2) 
	+ '-' +  substring(convert(varchar(32), getdate() ,120),9,2) 
	+ '_' + substring(convert(varchar(32), getdate() ,120),12,2) 
	+ substring(convert(varchar(32), getdate() ,120),15,2) 
	+ '_' + substring(convert(varchar(32), getdate() ,120),18,2)
	

set @filename = 'c:\Backups\xfire_' + @datetimestamp + '.bak'
set @archive   = 'c:\backups\xfire_' + @datetimestamp + '.7z' 

BACKUP DATABASE xfire  TO DISK = @filename

set @bu_command = 'c:\7za.exe a -t7z ' + @archive + ' ' + @filename 
set @del_command = 'del ' + @filename

exec @result = master..xp_cmdshell @bu_command

if (@result = 0) 
	begin
	exec @result = master..xp_cmdshell @del_command
	end
else raiserror ('7Zip error', 1, 1)

I'm thinking about how I want to implement a simple CAD type sprinkler system drawing, for drawing pipes and placing heads over a floor plan. I've been looking at wpf.

WPF Overview

DrawingVisual Objects

Hit testing on the Visual Layer (edit 571) Permalink

This is a good article about Microsoft Access references. (edit 570) Permalink

Hydronics Eng has some cool stuff about hydraulic engineering.

An article about the differences between NFPA 13 and 13D calculations.

Someone said...

HzW only works for straight pipe with water!

For a Reducer,

Head loss, Hf = (1/Cc - 1)^2 * V2^2 / 2 / g
where,

Cc = 0.582 + 0.0418/(1.1-D2/D1)
D1 = upstream inside diameter
D2 = downstream inside diameter
V2 = downstream fluid velocity
g = acceleration due to gravity

For an Expander, divide the above Hf by 0.7

This is and ancient book about hydraulics. (edit 569) Permalink