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• h2 & linux. how to start the database?

  - by David

  sorry im rather new to linux ubuntu. i have an application that i made that runs with tomcat and connects to an h2 database. it all works fine on my windows laptop. im now moving it onto my linux computer to run all the time. but im having trouble with starting the database. i have downloaded h2 from their website. and its sitting on my desktop. the question is. how to start the database. and is their any other commands i need to know to run and operate it. thankyous

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• How to play audio podcast file from libsyn rss feed? (drupal)

  - by Kirk Hings

  Got an established libsyn rss feed, got a new drupal website for the podcast. Libsyn provides a player but not correct aesthetic. I can upload and play mp3 files with audio module and mp3player module, and like the mp3 player's output, a simple flash player, but I don't want to be manually moving the podcast audio files (mp3) over every week. Looked at importing automatically with Feeds, but it's not working and besides that's creating extra files unnecessarily on the drupal site. Just want to use the mp3player modulee's flash player in a drupal page, which feeds the latest mp3 file from a libsyn rss feed. Don't really need to store or play multiple episodes, just the latest episode. How would you do it?

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• Redirecting part of URL in Nginx

  - by Maca

  Trying to move my blog to a new site and I want to redirect some urls. I use nginx. https://blogurl.com/news/2014-08-19/post-3451/mt-preview-33e2742af1eb.php The /news/2014-08-19/post-3451/mt-preview-33e2742af1eb.php part would be always moving. Redirect to below: https://blogurl.com/content/news/2014-08-19/post-3451/mt-preview-33e2742af1eb.php I basically want to insert /content/ after https://blogurl.com and so far I have rewrite ^(.*)$ /content/ break; But my issue is my CMS sits on the same directory level https://blogurl.com/mt/admin and if I simply apply the rewrite above my CMS address would move too. How could I prevent this.

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• Expression Studio - v2 good enough for learning?

  - by aSkywalker

  I have VS 2008, and looking forward to moving fairly quickly to VS2010. Our applications (we only have a few) are all winforms apps - mostly VB. I want to start to learn WPF. My version of Expression Studio is version 2. I have heard that the improvements made from version 2 to version 3 are significant. If it follows the paradigm of version 3 being the adult app (past the infancy of version 1 and the awkwardness of version 2), then I suppose it would be worth the investment to get it before starting to learn. But, unless my company was willing to pay, I am hoping to keep costs low. Can anyone share some experience - is version 2 good enough to learn on, or should I bite the bullet and smooth my learning experience by going with version 3? Thanks!

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• Objective C instance variables - Newbie

  - by Dwayne King

  OK - so I'm sure my confusion here is just a result of being stuck in a "Java mindset" and not understanding how Obj C differs in this case. In Java, I can declare a variable in a class, like this, and each instance of that class will have it's own: MyClass { String myVar; MyClass() { // constructor } } In Obj C I tried to do the same thing by declaring a variable only in the .m file like this: #import "MyClass.h" @implementation MyClass NSString *testVar; @end My expectation here was that this variable has a scope limited to this class. So I created a second class (identical): #import "MySecondClass.h" @implementation MySecondClass NSString *testVar; @end What I'm seeing (and has me baffled) is that changing the variable in one class, affects the value seen in the other class. In fact, if I set a breakpoint, and then "Jump to Definition" of the variable, it takes me to th I've created an extremely small XCode project that demonstrates the problem here Nothing more humbling than moving to a new language :) Thanks in advance.

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• Rapid Prototyping for Embedded Systems

  - by dr_pepper

  For doing prototyping on small embedded projects that require physical motion, what hardware prototyping tools are available? For my projects, I tend to spend more time finding parts (i.e. wood, aluminum, etc.) and making the proper cuts, measurements, and connections than writing the software and configuring the electrical hardware. Are there any affordable products that will enable me to create physical hardware that is strong enough to support motion? If not, what techniques or tools are available to help develop the physical hardware more quickly? Currently, I typically build my projects from wood and plastic scraps that I have lying around. What types of materials enable you to prototype more quickly? CLARIFICATION: By motion, I mean something that has to bear stress like a robot arm powered by a servo motor and could handle moving or carrying 1-2 lbs.

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• Plot multiple files

  - by LucaB

  Hi I'd like to make an animation that illustrates the positions of some agents I'm simulating under Linux. Basically, I have some files named file00001.dat, file00002.dat and so on. I have to generate "something" that get files in order, and output an animated gif, a dynamic graph or whatever, that simulates the moving reading data from file. I have control on the files, meaning that I can put identifiers or everything I want. How would you achieve that? What programs would you use?

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• Fastest way to convert file from latin1 to utf-8 in python.

  - by xsaero00

  I need fastest way to convert files from latin1 to utf-8 in python. The files are large ~ 2G. ( I am moving DB data ). So far I have import codecs infile = codecs.open(tmpfile, 'r', encoding='latin1') outfile = codecs.open(tmpfile1, 'w', encoding='utf-8') for line in infile: outfile.write(line) infile.close() outfile.close() but it is still slow. The conversion takes one fourth of the whole migration time. I could also use a linux command line utility if it is faster than native python code.

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• Where do enumerations belong

  - by griegs

  At my current place of emplyment they were putting enumerations into the class they used them in. Whilst I didn't see any duplication of these enumerations I non the less thought that they didn't belong in the class so I moved them out into their own class. The reason I did that was that I wanted them to be re-usable w/out needing to reference the model class they were originally in. I got asked why I did that by the boss who disagreed with me as to my reasons for moving them and say nothing wrong with putting enumerations in a model class. So where should they be? Is it acceptable to leave enumerations in a class and hope that others in the project know to refactor your code if they want to re-use it elsewhere or should, as I did, you create an enumerations class and have them all in there?

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• What is an algorithm for minimizing some D distances between N items?

  - by Ross

  A classmate printed out a diagram of a database for class, the kind with lines representing relationships between tables. However, his lines crossed all over the place and it looked ugly. So I got to thinking about a way to move the tables to minimize the total line distance, and I couldn't think of a way to do it, other than just moving them all on top of each other. So basically: Given N items on some 2d coordinate space and some amount of connections between pairs of those items, how do you move the items so that the total distance between pairs is minimal, but that no distance is smaller than S? (so that the tables would not be too close together) Is there some algorithm for this? (I realize that smallest total distance won't necessarily make the layout less ugly; lines might still cross. But the table layout is just what got me thinking)

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• Can I add an existing 2008 build server to new TFS 2010 server ?

  - by driis

  My scenario is this: I am currently testing out a new Team Foundation Server 2010 installation; which we will be moving to shortly. Upgrading builds to work with TFS 2010 and the new MSBuild seems like a lot of work (it does not work out-of-the-box, at least). So what I would like to do, is to repurpose our old TFS Server to be a build server for TFS 2010. It already has build services installed. I cannot figure out how to add an existing TFS 2008 Build Server to my new TFS 2010 installation, so I can use the old server to run old builds. Is this possible ? How can I do it ?

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• What's the best way to implement one-dimensional collision detection?

  - by cyclotis04

  I'm writing a piece of simulation software, and need an efficient way to test for collisions along a line. The simulation is of a train crossing several switches on a track. When a wheel comes within N inches of the switch, the switch turns on, then turns off when the wheel leaves. Since all wheels are the same size, and all switches are the same size, I can represent them as a single coordinate X along the track. Switch distances and wheel distances don't change in relation to each other, once set. This is a fairly trivial problem when done through brute force by placing the X coordinates in lists, and traversing them, but I need a way to do so efficiently, because it needs to be extremely accurate, even when the train is moving at high speeds. There's a ton of tutorials on 2D collision detection, but I'm not sure the best way to go about this unique 1D scenario.

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• elastic / snaking line algorithm

  - by vhdirk

  Hi everyone I am making a graphics application in which I can edit a polyline by dragging the control point of it. However, I'd like to make it a bit easier to use by making it elastic; When dragging a control point, instead of moving a single point, I'd like the points within a certain distance of that point to be moved as well, depending on how hard the control point is 'pulled'. Does anyone know a simple algorithm for this? It may be quite rudimentary, as the primary requirement is speed. Actually, knowing how to call such behaviour would also be nice, so I can look it up on google. I tried 'snaking' line, but that seems to refer to active contours, which isn't what I'm looking for. Thanks

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• Pros and Cons of Access Data Project (MS Access front end with SQL Server Backend)

  - by webworm

  I have been tasked with moving an existing MS Access application (mdb) over to an Access Data Project (adp). Basically the Access forms will remain the same but the data will be migrated over to SQL Server. I am not too familiar with Access Data Projects so I was hoping I could get some opinions on the pros and cons of using them. My first thought was to convert this to a web application or even a Winform application, however I really wanted to perform due dilligence in looking at Access Data Projects before making a decision. Thanks for any assistance.

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• Organizing PHP includes in your development environment

  - by Andrew Heath

  I'm auditing my site design based on the excellent Essential PHP Security by Chris Shiflett. One of the recommendations I'd like to adopt is moving all possible files out of webroot, this includes includes. Doing so on my shared host is simple enough, but I'm wondering how people handle this on their development testbeds? Currently I've got an XAMPP installation configured so that localhost/mysite/ matches up with D:\mysite\ in which includes are stored at D:\mysite\includes\ In order to keep include paths accurate, I'm guess I need to replicate the server's path on my local disk? Something like D:\mysite\public_html\ Is there a better way?

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• How Matlab calculates the camera view angle?

  - by iman

  I am using matlab to visualise a scene. In order to zoom in the scene, I can do that by eather: - Fix the cameraposition and the cameratarget and change the cameraviewangle.or - Fix the cameratarget and the cameraview angle and moving the camera along the viewing line (defined by the cameraPosition and the cameraTarget). I know how to set the values of cameraposition CameraTarget and viewangle, but I do not how to define the optimal view angle. In auto mode of cameraviewangle, matlab calculate the smalest view angle that capture all the scene from the specefied camera position. I appreciate any help in understanding this. Iman

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• predict location of single-line text from a UITextView

  - by William Jockusch

  Is this possible? Specifically, I have a UITextView, and the text is short enough that it will fit on a single line. I want to predict where it will appear, so that (for example) if I wanted to, I could set up a UILabel that rendered the text in exactly the same location. Once I get that figured out, what I really want to do is pick contentInset and/or contentOffset so that the text of the UITextView and the left-justified UILabel will render in the same location. But I figure the above will let me do that. EDIT: In response to a comment, the fundamental problem I am trying to get around is that UITextField does not let you set the location of the cursor. It appears a lot of people have tried to get around this without success. I need to be able to move the cursor -- inserting/deleting text there is not enough. Control cursor position in UITextField Insert string at cursor position of UITextField Moving the cursor to the beginning of UITextField iOS -- dealing with the inability to set the cursor position in a UITextField

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• Can't move li elements from one unorderted list to another

  - by Roland

  I have two un-ordered list <ul id="#list1"> <li>one</li> <li>two</li> </ul> <ul id="#list2"></ul> and two buttons <input id="add" name="yt1" type="button" value="<<" /><br /> <input id="remove" name="yt2" type="button" value=">>" /> If the button with the id add is pressed all elements from #list1 should be move to #list2. How do I move elements from one list to another using JQuery I though of something like the below, but not sure how to do the actual moving $("#add").click(function(){ $("#list1 li").each(function(){ //Do not know what to put in here } })

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• Startup params for Silverlight 4 app

  - by Number8

  Hello -- We are moving our SL3 app to SL4. First step was to open it in VS2010; it converted w/o problem. However, parameters specified for the start page are not passed along. That is, if we specify ourStartPage.aspx?Slam=Dunk&Glass=Sun in app.xaml.cs, Application_Startup(), e.InitParams is empty. How do we fix this? Thanks for any advice.... (Note that the very same startup string worked in VS2008.)

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• JQuery Div not animating in click function

  - by Doug

  Hi Everyone! I have the following code, I am attempting to have a div animate on a click event, but for some reason the div is immediately moving to the location and it's not animating to the coordinates specified, what am I doing wrong here? code: $(document).ready(function() { $('#example1').click(function(e){ var x = e.pageX - this.offsetLeft; var y = e.pageY - this.offsetTop; $('#example1-xy').html("X: " + x + " Y: " + y); var leftOfShip = x; //var leftOfShip = document.getElementById("ship").style.left + 20; $("#ship").animate({left: $("#ship").css("left",leftOfShip)},5000); }); }); Any Advice would be of help!!

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• In what circumstances can large pages produce a speedup ?

  - by timday

  Modern x86 CPUs have the ability to support larger page sizes than the legacy 4K (ie 2MB or 4MB), and there are OS facilities (Linux, Windows) to access this functionality. The Microsoft link above states large pages "increase the efficiency of the translation buffer, which can increase performance for frequently accessed memory". Which isn't very helpful in predicting whether large pages will improve any given situation. I'm interested in concrete, preferably quantified, examples of where moving some program logic (or a whole application) to use huge pages has resulted in some performance improvement. Anyone got any success stories ? There's one particular case I know of myself: using huge pages can dramatically reduce the time needed to fork a large process (presumably as the number of TLB records needing copying is reduced by a factor on the order of 1000). I'm interested in whether huge pages can also benefit more mundane applications though.

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• SQlite/Firebird: Does any of them support multiple concurrent write access ?

  - by Quandary

  Question: I currently store ASP.net application data in XML files. Now the problem is I have asynchronous operations, which means I ran into the problem of simultanous write access on a XML file... Now, I'm considering moving to an embedded database to solve the issue. I'm currently considering SQlite and embeddable Firebird. I'm not sure however if SQlite or Firebird can handle multiple concurrent write access. And I certainly don't want the same problem again. Anybody knows ? SQlite certainly is better known, but which one is better - SQlite or Firebird ? I tend to say Firebird, but I don't really know. No MS-Access or MS-SQL-express recommodations please, I'm a sane person.

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• Suspend TimerTask until the next execution

  - by user1052518

  I am using a TimerTask to run some periodic tasks, the task being processing a set of files. I have a requirement where if the number of files to be processed exceeds a pre-determined limit, the thread suspends execution and waits till the next cycle to start processing the files again. Is there a way to suspend the TimerTask until the next execution period or do I have to extend the TimerTask class to achieve this functionality? I saw there is a TimerTask.cancel method, but this will cancel all further executions of this thread. I don't want this to happen. I just want the thread to be suspended until the next execution period. I don't have the luxury of moving to any of the other concurrent classes in Java as our framework uses TimerTask, and I have to stick with it. Any suggestions, pointers or tips are greatly appreciated. thanks, Asha

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• Simple doubt related to strings in C (question in an interview)

  - by piemesons

  // The first example: char text[] = "henri"; char *p; p = text; *(p + 1) = 'E'; // Output = hEnri // Now If we want to remove the "e" ie hnri, we would go for????? *(p + 1)=????? Please dont say start copying the array. I am looking for the best solution. Its an interview question... EDIT I specially mentioned the question that i am not asking for the solution like start moving the element. I thought there must be some other good solution..

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• Advice for keeping large C++ project modular?

  - by Jay

  Our team is moving into much larger projects in size, many of which use several open source projects within them. Any advice or best practices to keep libraries and dependancies relatively modular and easily upgradable when new releases for them are out? To put it another way, lets say you make a program that is a fork of an open source project. As both projects grow, what is the easiest way to maintain and share updates to the core? Advice regarding what I'm asking only please...I don't need "well you should do this instead" or "why are you"..thanks.

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