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• Generalized plugable caching pattern?

  - by BCS

  Given that it's one of the hard things in computer science, does anyone know of a way to set up a plugable caching strategy? What I'm thinking of would allow me to write a program with minimal thought as to what needs to be cached (e.i. use some sort of boiler-plate, low/no cost pattern that compiles away to nothing anywhere I might want caching) and then when things are further along and I know where I need caching I can add it in without making invasive code changes. As an idea to the kind of solution I'm looking for; I'm working with the D programing language (but halfway sane C++ would be fine) and I like template.

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• How do I write my own desktop sharing application in java ?

  - by nomemory

  Hello I want write my own desktop sharing application in Java. The application should have some very default features: Capture screen; Allow a remote connected user to click / edit fields. I was thinking to use Java Robot class for mouse movements / key pressing. The problem is i don't know what screen capture strategy to use. Should I make sequentially screen captures (on the hosting computer) every second, and send those captures with UDP via network, so that the clients can intercept the data-grams ? Isn't this a little overkill for the network ? What other strategies are available ? (Except trying an already existing app). PS: If necessary I can even write native code using JNI (still that's the last thing I planning to do).

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• Android alarm not working

  - by erdomester

  I've been struggling with this for hours. I've also checked the documentation and several topics. I found this code in two topics, both guys said the code was working perfectly, but not on my computer. The first Toast appears, but the second one never. What is wrong? public class HelloAndroid2 extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Intent intent = new Intent(this, AlarmReceiver.class); PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_ONE_SHOT); AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE); alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + (10 * 1000), pendingIntent); Toast.makeText(this, "Alarm set", Toast.LENGTH_LONG).show(); } public final class AlarmReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { Toast.makeText(context, "Alarm worked.", Toast.LENGTH_LONG).show(); } } }

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• How to connect to Oracle 10g server from client machines

  - by Tareq

  I have installed Oracle 10g in one of my office's computer. I want to keep this as database server. I am developing a .net project which will communicate with the database server from client machine and from the server machine. I success to communicate with oracle from server machine but not from client machine using the .net project. The connection code is as follows: Public OraConn As ADODB.Connection OraConn = New ADODB.Connection OraConn.Provider = "OraOLEDB.Oracle" OraConn.ConnectionString = "Data Source=<my_database_name>;User ID=<my_user>;Password=<my_pass>;" OraConn.Open() Please tell me step by step procedures how can I connect to my server database from my .net client program resides on client machine ? Thanks in Advance.

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• Why many "normal" string in my flashlog file

  - by randy

  I suddenly find that there are many "normal" trace in my file flashlog.txt (supposed at your Window's location:{SysDrive}:\Documents and Settings{yourName}\Application Data\Macromedia\Flash Player\Logs). normal normal normal normal normal normal 1/10/2011 15:32:13.008 [INFO] org.spicefactory.parsley.core.view.impl.DefaultViewManager Add view root: null/flash.display::Stage normal normal normal But when I run the application with the FlashBuilder, the logging in the consul page is ok, it doesn't include any "normal" String. I am very confused by this, I thought that the output of the flashlog.txt file should be the same as that of the consul of FlashBuilder.And I don't think I have added such a stupid trace in my code. The question is how can I find out where these "normal" trace come from and how to remove it. This problem is resolved by restarting the computer as suggested.

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• Watin File Download Problem

  - by EmrahIlker

  When I clicked button with mouse, File Download Dialog opens directly. But when Watin Button Click methods click the vert same button on same ie window this message appears and wait my confirm To help protect your security, Internet Explorer blocked this site from downloading files to your computer. Click here for options. I turned off the Information bar for file downloads,(Internet Options-Security-Custom Level-Downloads-Automatic prompting for file downloads--Enable),allow active x content, lower security level for internet etc.. but didn't work. I'm using Win 7, IE8.

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• How can I launch a system command via Javascript in Google Chrome?

  - by kvsn

  I want to execute a local program on my computer via Javascript in Chrome. In Firefox, it can be done as follows (after setting 'signed.applets.codebase_principal_support' to true in about:config): function run_cmd(cmd, args) { netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect"); var file = Components.classes["@mozilla.org/file/local;1"] .createInstance(Components.interfaces.nsILocalFile); file.initWithPath(cmd); var process = Components.classes["@mozilla.org/process/util;1"] .createInstance(Components.interfaces.nsIProcess); process.init(file); process.run(false, args, args.length); } What's the equivalent code for Chrome?

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• Need to change ip address in app.config in runtime without runnning as admin

  - by djerry

  Hey guys, There's a lot of post saying how to change info in the app.config and there are posts that say you shouldn't edit info in the app.config but store info in user folders. I understand these topics. But what i want is a combination of both. I have a wcf setup for my client in an app.config, which contains the endpoint address to which it should connect. When The server changes ip, or when a client is installed on a computer in another company, the user should be able to insert another ip-address which should be stored in the app.config. This cannot be stored in a file in appdata or something like that, as the client reads the info in the app.config on startup. How can i write (so remember the new ip-address) in the app.config when the client is installed in program files, the UAC is enabled and the program isn't run as an admin? Thanks in advance.

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• Fermat factorization method limit

  - by Fakrudeen

  I am trying to implement Fermat's factorization [Algorithm C in Art of computer programming Vol. 2]. Unfortunately in my edition [ISBN 81-7758-335-2], this algorithm is printed incorrectly. what should be the condition on factor-inner loop below? I am running the loop till y <= n [passed in as limit]. (if (< limit y) 0 (factor-inner x (+ y 2) (- r y) limit)) Is there anyway to avoid this condition altogether, as it will double the speed of loop? (define (factor n) (let ( ( square-root (inexact->exact (floor (sqrt n))) ) ) (factor-inner (+ (* 2 square-root) 1) 1 (- (* square-root square-root) n) n) ) ) (define (factor-inner x y r limit) (if (= r 0) (/ (- x y) 2) (begin (display x)(display " ")(display y)(display " ")(display r)(newline) ;(sleep-current-thread 1) (if (< r 0) (factor-inner (+ x 2) y (+ r x) limit) (if (< limit y) 0 (factor-inner x (+ y 2) (- r y) limit)) ) ) ) )

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• What is the relationship between IRimTable and PersistenceStore?

  - by Martin

  The BlackBerry Desktop API has the interface IRimTable which apparently maps an "application database" on a BlackBerry device to a virtual structure (i.e, IRimTable has IRimRecords, each of which has IRimField) that developer can browse the handheld device data when it is connected to a desktop computer. Meanwhile, applications in the handheld device can store its data in PersistenceStore databases. The point where I'm stuck is the PersistenceStore API doesn't define any Table or Records or Fields. Does anybody knows what is the relationship between these two classes? And how does the mapping work (if at all) ?

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• Detect insertion of media into a drive using windows messages

  - by rschnorenberg

  I am currently using WM_DEVICECHANGE to be notified when new USB drives are connected to the computer. This works great for devices like thumb-drives where as soon as the device arrives it is ready to have files read from it. For devices like SD card readers it does not because the message is sent out once when the device is connected but no message is sent when a user actually inserts a card into the device. Is it possible to detect the insertion of new media into an existing USB device without having to use polling?

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• gethostbyname in C

  - by Matic

  I don't know how to write applications in C, but I need a tiny program that does: lh = gethostbyname("localhost"); output = lh->h_name; output variable is to be printed. The above code is used in PHP MongoDB database driver to get the hostname of the computer (hostname is part of an input to generate an unique ID). I'm skeptical that this will return the hostname, so I'd like some proof. Any code examples would be most helpful. Happy day, Matic

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• Extending Windows Desktop using C#

  - by Lijo

  Hi Team, I am trying to customize my Windows XP’s desktop using C# code. This is my first venture of this kind. Could you please point me to some documentation that will Give the names of classes that can be used for extending/customizing Windows’ desktop Some example code What I am trying to do specifically is as follows I am planning to customize the desktop. When I unlock my computer (by entering user name and password) the files should come(by flying) into their required places. Initially the files are to be located in the right end corner. Thanks Lijo Cheeran Joseph

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• Anyone realize success using Apple Mac OS 10.6 and Parallels 5 for a Visual Studio Dev machine?

  - by Buffalo

  Greetings my wonderful StackOverflow family :) I grew up using Windows and switched to OSX as a Computer Science major in College. I've recently started my first real software developer job, and have a ThinkPad and Windows XP for developing ASP.NET / MS SQL applications (Visual Studio 2008). Question: Basically, I am wondering if any developers out there have had real success creating ASP.NET applications on a Mac using a VM? I've been fighting with Parallels 5 all week and finally have Windows 7 and VS 2008 running but my hot-keys are all screwed up. Is it worth the work to keep beating this thing into submission? Should I give up? Should I give Mono a try instead? Thanks Folks, I can't wait to see what you all think!

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• 8051 microcontroller kit recommendation?

  - by LucidDefender

  I'm a first year Computer Science student looking to get started with development for micro-controllers. I'd like to use the 8051, as it's common as dirt, and is used frequently in the real world. During my junior or senior year, I'll be taking a PIC micro-controller based embedded design class, so I'd rather not do PIC now; otherwise, I'll be fairly bored during that course. Most commercial kits I see are for the AVR or PIC series of microprocessors. I'm just looking for something with decent development tools, documentation, and enough add-ons to keep my novice self occupied for the summer. Any recommendations for an 8051 family kit? Thanks!

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• Are there any tools in IDEs to automatically fix comment formatting?

  - by Fragsworth

  /* Suppose I have a multi-line comment with hard line-breaks * that are roughly uniform on the right side of the text, * and I want to add text to a line in order to make the * comment a bit more descriptive. */ Now, most unfortunately, I need to add text to one of the top lines. /* Suppose I have a multi-line comment with hard line-breaks (here is some added text for happy fun time) * that are roughly uniform on the right side of the text, * and I want to add text to a line in order to make the * comment a bit more descriptive. */ It takes O(n) time (n being the number of lines) to fix each line so that they roughly line up again. The computer should do this, not me. Are there tools to deal with this in our IDEs? What are they called?

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• flex chat/telnet application send/receive same window in TextArea

  - by Renassaince Geek

  Hi there, Just wanting to know if anybody has seen an example of a telnet/chat or other console like FLEX application where you can use the same TextArea as input/ouput area. I've been trying to modify the app at: http://livedocs.adobe.com/flex/3/html/17_Networking_and_communications_8.html but so far, computer says no. All the implementations I've seen use a combination of TextInput and TextArea. The challenge is that we'll be using this app to telnet into some old routers and we'll need to do a fair amount of copy/pasting. Based on what I've seen, it seems that I would need to point the mouse into the TextInput in order to be able to right click and paste, which is not very sleak..... Your thoughts, Fran

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• Orbital equations, and power required to run them

  - by Adam Davis

  Due to a discussion on the SO IRC today, I'm curious about orbital mechanics, and The equations needed to solve orbital problems The computing power required to solve complex problems The question in particular is calculating when the Earth will plow into the Sun (or vice versa, depending on the frame of reference). I suspect that all the gravitational pulls within our solar system may need to be calculated, which makes me wonder what type of computer cluster is required, or can this be done on a single box? I don't have the experience to do a back of the napkin test here, but perhaps you do? Also, much thx to Gortok for the original inspiration (see comments).

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• Arduino not able to send serial data back

  - by Casper Marcussen

  Hello everyone So i found out how to connect the arduino to my java program. But using the seriel connections dosent give any useful data back, its either in the wrong format, or just sends it as a box. I've looked at the related questions posted early in here, but none of the tips seems to help. So does anyone know how to send the data between an arduino and a computer using the serieal port? P.S I've used the sample code from the arduino.cc homepage to connect to the serial port.

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• How can I transition from a front-end career to back-end career?

  - by jexx2345

  Hello, In 2004, I received my B.S. in Computer Science using mostly Java for programming. Since then, I have been hired for purely front-end positions in large companies through recruiters, doing primarily HTML/CSS, Javascript/jQuery, and OOP Actionscript 3. While I definitely have respect for the front-end, and have learned much, I feel very unfulfilled and would love to move into back-end for the more complex programming I was doing in school. My target platform of choice is ASP.Net 3.5 (C#). With a resume that has absolutely no .Net or back-end experience, how can I transition into a junior back-end job? I am currently freelancing a .Net e-commerce site, and plan to build a portfolio showcasing some apps (e-commerce mvc, blog, etc), while learning the technology. Is having a Bachelors in CS enough or should I look into getting .Net certified? Is showing course-work still relevant to an employer even though it was from 6 years ago? Thank you

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• VB.net Network Graph code/algorithm

  - by Jens

  For a school project we need to visualise a computer network graph. The number of computers with specific properties are read from an XML file, and then a graph should be created. Ad random computers are added and removed. Is there any open source project or algorithm that could help us visualising this in VB.net? Or would you suggest us to switch to java. Update: We eventually switched java and used the Jung libraries because this was easier for us to understand and implement.

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• TFS 2012 fresh install on fresh Windows Server 2008 warning that reporting services are not installed

  - by jshin47

  I am attempting to evaluate TFS 2012 for our organization but cannot seem to get past the first step of configuring the server using the "Standard Single Server" configuration wizard. In particular, in the service account selection screen, I am warned that: Reporting services are not installed on this computer. You need to install Reporting Services to complete TFS installation with this wizard. This is disheartening because the way I understand it, this should have been installed with the default TFS installation (in fact, no installation options are even provided) and this is a fresh and up-to-date Windows Server 2008 VM. I know I could install SQL Server 2008 or 2012 from MSDN, but shouldn't this work "out of the box?" I'd really rather use the default, small, integrated version of SQL Server that comes with TFS 2012 rather than rolling my own. If it matters, this server is joined to a domain and I am running TFS installation wizard as a domain administrator.

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• C# database file directory

  - by Simon

  I'm using the windows forms aplication with an ms access database. And i would like to know if there is a way to show the directory of the database file (to save data in it)excpet like this: string connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=save.mdb"; or this: "Data Source=D:\Simonova aktovka na namizju\matura\test5\save.mdb"; couse if i use the first one the aplication undos the changes i've made when i close it(the aplication) the second one makes me have to change the path everytime i bring the aplication to another computer(cous the direktory is different of coars) So... is there another way?

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• Issues with SharePoint 2010 Development

  - by Rahul Soni

  I am planning to use my laptop for SharePoint 2010 development and I have only 4 GB RAM which is not even upgradable. Just because of RAM constraint, my VS 2010 keeps crawling if I try to run it along with SharePoint 2010 on the same machine. Hence, I've reformatted my machine and looking for alternate solutions until I get a new laptop. Currently, I have installed VS 2010 ONLY on my laptop and wanted to create an empty SharePoint project. Once done with my project, I want to deploy it on a different machine (which is a 4GB RAM machine as well, but contains only SharePoint 2010). I thought this will work and give me a bit of breather if everything is configured well. Unfortunately, when I tried creating a new SharePoint Empty Project in VS 2010, it says... A SharePoint server is not installed on this computer. A SharePoint server must be installed to work with SharePoint projects. Is there a way out?

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• Testing the program in different OS

  - by Alex Farber

  I want to test my program by installing it in different OS versions. My development computer is Ubuntu. What other Linux versions can I test by installing them inside VirtualBox and running my program there? Though it is not critical for me right now, I want to try something different and see what happens. Also, what is the chance that the program running in Linux will work in the Unix OS? The program is not open source, I can distribute only pre-built binaries.

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