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Articles indexed in March 2010

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  • Creating lots of arrays

    - by Dmitry
    Hello, everybody! May be that is a stupid question. How to create, say, 30 arrays (it doesn't matter of what type, say, char[])? It seems to me that it is not a good idea, to create them one by one by hand. I want to do that using a "for" cycle, but how should I specify identifiers?

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  • Calculate car filled up times

    - by Ivan
    Here is the question: The driving distance between Perth and Adelaide is 1996 miles. On the average, the fuel consumption of a 2.0 litre 4 cylinder car is 8 litres per 100 kilometres. The fuel tank capacity of such a car is 60 litres. Design and implement a JAVA program that prompts for the fuel consumption and fuel tank capacity of the aforementioned car. The program then displays the minimum number of times the car’s fuel tank has to be filled up to drive from Perth to Adelaide. Note that 62 miles is equal to 100 kilometres. What data will you use to test that your algorithm works correctly? Here is what I've done so far: import java.util.Scanner;// public class Ex4{ public static void main( String args[] ){ Scanner input = new Scanner( System.in ); double distance, consumption, capacity, time; distance = Math.sqrt(1996/62*100); consumption = Math.sqrt(8/100); capacity = 60; time = Math.sqrt(distance*consumption/capacity); System.out.println("The car's fuel tank need to be filled up:" + time + "times"); } } I can compile it but the problem is that the result is always 0.0, can anyone help me what's wrong with it ?

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  • Are there any programming languages targeting PHP, besides haXe?

    - by stesch
    PHP doesn't get much love but is still a winner at easy deployment (for cheap hosting). Are there any programming languages (besides haXe) that target PHP? Writing applications in this language and then translating it into PHP, like some languages target C as an intermediate language? The Scheme implementation Chicken compiles into C. XOTcl converts Java code into Tcl code LINJ was(?) a tool to convert Lisp into nice looking Java code … + a lot of ways to produce JavaScript without touching JavaScript.

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  • Creating directory?

    - by Vineet
    When iam creating directory using sytem as user create directory emp_dir1 AS "'C:\Documents and Settings\Administrator\Desktop\vin.txt"; vin.txt is my file it creates it. same when i do using user Scott it gives an error for path of file that "Identifier is too long" but when i put this file path in single quotes instead of double quotes for scott, it creates it. What is the reason behind?

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  • Flex Datagrid editing calls from same row not firing collection change event

    - by Chin
    Hi, I am using the flex datagrid to allow the user to edit some data. My update process relies on a CollectionEvent of type update. Basically I catch this event package the values and update the database. However, if the user edits a cell then moves to edit a cell in the same row the value of the parameter in the object is updated but a collection event is not fired. Only when clicking out of the row the event is fired. Has anyone had experience with this. I have heard the datagrid is a little quirky is this one of those quirks or am I doing this all wrong? Any help appreciated.

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  • Python 2 vs Python 3 and Tutorial

    - by MR-J
    Hey guys. I am 12 years old and I have had a small amount of experience with BASIC. I am thinking about learning Python, but I’m not sure if I should learn the 2.6 version or the 3.0 version. I don’t really care about the support for libraries or anything along those lines quite yet. I was wondering if it is easier to code in 3.0 than 2.6. And is it more fun and productive? I would also appreciate it if you could point me in the right direction for a simple yet complete tutorial that is easy to understand and possible teaches Object Oriented Programing. I don’t really care if it teaches OOP or not. One more thing; if I do learn python, is it possible to easily compile a python source code file into a 'stand-alone' .exe file for Windows? I really liked that functionality in BASIC. Thanks!!!!

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  • Project: Building An All-Text Linux Workstation

    <b>LinuxCommand.org:</b> "Over the next few weeks, I will show you how to take an old, slow computer and make it into a text-only Linux workstation with surprising capabilities, including document production, email, instant messaging, audio playback, USENET news, calendaring, and, yes, even web browsing."

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  • Weird TPS peaks on SQL 2005 replicated database.

    - by SuperCoolMoss
    When monitoring the Transactions/Sec using perfmon on one of my SQL2005 replicated databases - I'm seeing the TPS increase to 1000 and then immediately drop back down again - this happens every 5 seconds. I'm not sure what's causing this - is this something to do with replication? We also have asynchronous statistics set on this particular database. I've tried profiling when the users are not connected - but nothing is writing to the database. ADDED PICTURE AND BOUNTY

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  • Is it possible to have XP Mode in Windows 7 Home Premium?

    - by Paul
    I have Windows 7 Home Prem 32-bit with 2GB RAM. I have some older software that won't run so am wondering if i can run XP Mode? Is it only possible if you have Windows 7 Professional or Ultimate? If that is the case is there any other way to do something similar or will i need to install XP on another HD or partition?

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  • Touchpad button assignments don't persist with Lenovo T400 on WinXP

    - by Nathan Fellman
    I have a Lenovo T400 notebook with Windows XP on it. I usually use the TrackPoint, and almost never use the TouchPad. I do a look of work on Linux over VNC, in my setup the middle mouse button is mapped to "paste". Considering that the notebook doesn't really have a middle button (it's only a scrolling button) I mapped the unused left button of the TouchPad to be a middle button. However, when I send the computer to Standby and bring it out, the left button reverts to being a left button, not a middle one. How can I make sure that the mapping persists?

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  • Printing Large PDF from Outlook 2003

    - by mrach
    Whenever I try to print an attached oversized PFF sheet (larger then letter sized) from Outlook, the print is cut off. How can I configure Outlook to automatically fit the PDF to page sized with out having to open it up in Adobe Reader?

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  • Can I somehow know which replacement is taking place from within a callback of preg_replace_callback

    - by jayarjo
    I'm using preg_replace_callback to substitute particular tokens within the string. But apart from actual token I need to know as well whether that token was first, second or third in a subject string. Is there any way to access that info? I found an argument $count in preg_replace_callback definition (http://php.net/manual/en/function.preg-replace-callback.php), which counts replacements, but I'm not sure if it is accessible from within callback. Any example of the usage in described context?

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  • Is copying /var/lib/mysql a good alterntive to mysqldump?

    - by kemp
    Since I'm making a full backup of my entire debian system, I was thinking if having a copy of /var/lib/mysql directory is a viable alternative to dumping tables with mysqldump. are all informations needed contained in that directory? can single tables be imported in another mysql? can there be problems while restoring those files on a (probably slightly) different mysql server version?

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  • Bucket sort for integers

    - by rafael
    Could anybody help me with bucket sort algorithm for integers ? It's often mistake when people say they have this algorithm, but this is counting sort ! Maybe it works similar, but it is something different. I hope you will help mi find the right way, 'cause now I have no idea (Cormen's book and Wikipedia are not so helpful). Thanks in advance for all your respones.

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  • Execution plan different on two different Sql Servers

    - by Lieven Cardoen
    On our sql server, a query takes 20 ms. If I look at the execution plan, parallelism is used, hash match, Bitmap create, ... a lot of images with two arrows pointing to the left. On sql server of a customer where our product runs, the same query takes 2500 ms. If I look at their execution plan, no parallelism or any of the things with arrows are used... I've been searching for a couple of days no why the query runs so much slower on their sql server. Is parallelism and all of the other things something that can be configured on their sql server? And how to you configure that? What are the dangers of using parallelism? Another strange thing is that on our server, the query needs some 1200 reads and 0 writes. On their sql server it needs 1.5 million reads and some 1500 writes. Why these writes when a read query is done?

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  • Export an Excel spreadsheet to fixed-width text file?

    - by jkohlhepp
    Excel has the functionality to import fixed-width text files where it presents a dialog that lets you choose where the begins and ends of fields are which it puts into columns. Does it also have functionality where, given an existing spreadsheet, you can export to a fixed-width text file? If so, how do I access this? I have tried using Save As and choosing Text File but it seems to only save as Tab-delimited which doesn't help me. This is Excel 2003 if it matters.

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  • Injecting all registered instances of a type

    - by James L
    I can successfully perform container.ResolveAll<IMyInterface>(), and I get back an Enumerable containing every registered IMyInterface. However, I can't find a way to have these injected into the constructor of my class. I have tried using ResolvedArrayParameter(), but this gives me an empty enumerator. Am I doing something wrong, or could this be a bug in Unity?

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