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Assuming there's merit in this, I think it would make an excellent article for someone with the know-how.
Let's say you are writing a recipe program that can be used by people in various countries who use differing units of measurement. Converting gallons to liters or fahrenheit to celsius on the fly for displaying a recipe is easy enough that it's probably not worth worrying about performance, but what if someone wants to export a list of 100,000 recipes for someone using other units of measurement? With several ingredients and temperatures in each recipe, that results in a lot of conversions, and performance can become an issue. (The recipe list is just the first example that came to mind... There could be other situations with billions of such conversions.)
I wonder if there is a way to pre-calculate a generic unit of, e.g., weight, which can then be used to extremely quickly find ounces, pounds, grams, troy ounces, grains, etc. without resorting to floating-point division, etc.
I imagine this would fall under the umbrella of NP-complete problems, but since we're only dealing with a limited number of units it seems like it should be possible to find an optimal unit without waiting for a trillion years.  Can this be done or has it been done? Or am I on the wrong track here?
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generally, if a software is well released, and is MVC (model-view-Controlers) compliant, then the datas are always stored in the same way, in the same units.
the problem of units is a matter of graphical rendering, so that affects only the UI (user interface)...
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How i can remove icons from System Tray ? especially in Networked Operating System?
Nijo Francis
nijopf@gmail.com
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hope this[^] may interrest you
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Does anyone know of a com object that lets you create a named pipe, and then create an object that allows you to read/write to/from a named pipe?
Ted Toal
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Does anyone know of a shell namespace extension that shows the contents of the \\.\pipes pseudo-folder, and lets you create and delete named pipes in it and view and change their properties?
Ted Toal
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can any body please inform me
How to read data (digitized sound samples) from soundcard with or without using directX. and then saving to file displaying them.
desperatly waiting asap coz i am stuck with this problem......
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Any number of articles on using the multimedia API to 'record' sound would get you started.
Then, if you use PCM, you are getting the raw sound samples - they are not compressed at all.
You can adjust the card's sampling rate (8 KHz, 22KHz, 44 Khz, etc.) for your specific requirements.
People that start writing code immediately are programmers (or hackers), people that ask questions first are Software Engineers - Graham Shanks
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thanks buddy...
I'll try to follow you advice.
happy replying
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Hi all,
I'm looking for a way where invoking a print command from another application actually causes the printing application to send its data to my application or to save it as a file (bitmap, jpg, etc.) so I can access what was printed as an image. Basically, I'd like to print from any application (say I.E.) and have this "printer" be a choice in the print dialog - and after printing, the data generated by the application is handled completely by software.
Are there any articles about this on the web somewhere? (I've tried to find one but no luck)
If there are no articles, what's a good starting point? (Can this be done without DDK or driver development?)
If it requires writing a driver, what am I looking at? Driver? Spooler? I'm kind of lost on the terminology when it comes to this printer stuff.
Am I in the right forum? 
Thanks in advance.
-- modified at 19:32 Wednesday 1st March, 2006
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That's a good idea. I'll look around at sourceforge I guess.
Are there any projects that you are aware of that you'd recommend taking a look at?
Thanks
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Can anyone write an article about how to utilize the App Block inside the Ent Library if one is using VS2005 Express Edition?
Amateur/Hobbyist programmers need to learn about good patterns and practices as well.
Curious Newbie
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Iam working on a project , The objective is to get an Crysltal report (rpt) file as input , display the fields for which graph is possible to the user , The user selects the field and type of graph .
The output is a graph , which can be embedde to the rpt fle and saved
I dont know how to proceed . any idea abt rpt fie format or how to read it
Please help
Gopalakrishnan R V
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Hi, can anybody tell me how we can read barcodes (especialy EAN13) from barcode scanner
I Wish the Lift had CTRL+Z
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Plug the barcode scanner into a port on your keyboard (most modern keyboards have an input port).
The scanner will send the ASCII code for the barcoded characters and the computer won't know if the data came from the barcode scanner or the user typed it in himself.
There is no magic to it. But the barcode guys (and the programmers) won't tell you this little secret.
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Thx vivic
is the ascii code is something like 12345678900?(i have not the reader yet!)
and does the reader sends nothings about type like ean-13?
is it the same for USB readers?
Be happy![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif)
I wish the Life Had Ctrl-Z
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Barcode readers have been made simple to use.
There is a laser in the barcode reader (scanner) that is shined against the barcode. The reflected light is converted back to electrical energy. Now, the reflection is going to show small dark regions (thin bars), large dark regions (thick bars), no dark region (space beteern bars). etc. This information is automatically translated into the exact number the barcode represents.
Barcodes have a specific START symbol at the beginning of the barcode and a specific END symbol where the barcode ends. The reader knows that if you held the barcode upside down (and thus scanned it backwards), it has to reverse the sequence of numbers. So it always sends the correct information to its output port.
ASCII code is the standard by which all characters (numbers, letters, etc.) are represented inside the computer's memory. When you use the keyboard and press "2", the specific ASCII code for the number 2 is sent to the processor. When you use the barcode scanner, it uses the exact same ASCII representation so that the processor does not know if the data came in from a barcode reader or from the keyboard!
Is that clear? Or do you want more explanation?
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Thx Pablo
I'm going to check it
God Bless U
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Any time. Hope its helpfull. One of the sights i referenced may be helpfull also. There are links on the Article.
God Bless you to...And the rest of us as well 
Pablo
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Sir/Madam
Is there any site from where we get the information about the header of the Nikon NEF file format and Olympus ORF file format,means which information header store
thanku!
singhanshul
-- modified at 6:16 Tuesday 14th February, 2006
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Hello there,
Is there any way I can modify a Folder's properties programmatically? As in , I would like to Hide the Properties OPtion(specifically the Read-Only/Archive/Hidden) from the user but be able to modify it via my application. I figured out how to modify it but am having trouble in the hiding Part.
-- modified at 6:31 Tuesday 14th February, 2006
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Hello
I was developed Web Application using ASP With Crystal Report 9.
My Problem:
Now I want to display data in a single report file from more than one Table. Here I given how my Two tables.
Table1:
Col1 Col2 Col3
1 1 1
Table2:
Col1 Col2 Col3 Col4
2 2 2 2
3 3 3 3
4 4 4 4
5 5 5 5
My Report file design Look like....
Details a Table1.Col1 Table1.Col2
Details b Table2.Col1 Table2.Col2 Table2.Col3 Table2.Col4
When the report get generated records from Table1 get duplicated (i.e.) the output of my report is looking like.
1 1--------------------from (Table1)
2 2 2 2------from (Table2)
1 1(get duplicates)----from (Table1)
3 3 3 3------from (Table2)
1 1(get duplicates)----from (Table1)
4 4 4 4 -----from (Table2)
1 1(get duplicates)----from (Table1)
5 5 5 5------from (Table2)
So here i want to suppress the duplicated records please tell me in brief
N.Rajakumar B.E.,
Application Developer,
www.newdreamz.tk
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