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• Ubuntu 13.10 vs 12.04 LTS

  - by Shaun

  I am migrating my workflow to ubuntu from windows. I have a macbook pro at home and I really enjoy being able to use the workspaces feature on ubuntu to increase my productivity. As myself being someone that isn't very familiar with doing command line things and hasn't worked with linux a whole lot other than doing basic commands like cd, ls, rm, screen, and sudo. I was wondering what you think would be the best choice for a ubuntu version. I am looking for ease of use as well as stability. I spend most of my time working with eclipse, as well as writing documents. On a side note, right now I have a pretty high end workstation, but I am using a crappy notebook 2.5 inch 1TB hard drive for my system. Would it be worth it to switch to a top of the line SSD, or would the difference not really be noticeable? How difficult would it be for a newcommer to setup the system with the os and important folders running on a SSD and then other folders for storage running on a HD.

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• Emacs-like keybindings system-wide?

  - by kermit666

  Is there a way to set Emacs-like keyboard shortcuts (at least the subset mentioned below) for the whole OS? This is possible in some apps such as the terminal, Emacs (go figure :) and additionally through special plugins in some other apps (Eclipse), but I got so used to C-f-ing through text and never having to jump to arrows that I'd like to be able to do this system-wide so that I can do it whenever I'm typing - e.g. searching for songs in Rhythmbox, typing stuff into the dash or the HUD, writing mails in Thunderbird or Gmail... The combos I'm most interested in are: C-f - forward C-b - backwards C-a - home C-e - end C-d - delete C-k - delete line (note for non-emacs users - C means Ctrl)

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• How to use LDAP for authentication in Tomcat with Custom Authorization

  - by djc4

  Hello, I'm using JNDIRealm with Tomcat for authentication, which at the moment works fine. However, we do not store any roles in the LDAP, so all authenticated users are not returning any roles. This sends user's to an HTTP 401 failed authorization page. I'd like to assign an "Admin" role to any and all user's who authenticate successfully. Here is my fragment from my web.xml file. SecurityConstraint Resource Resource *.jsp GET POST Admin FORM login.jsp loginError.jsp Admin Should I be using a JAASRealm with custom LoginModule? After the realm calls the authenticate() method and returns success, should I override another method to explicitly set the RolePrincipal to "Admin" so that authorization succeeds? Please help! Thanks, Andy

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• updating a shape in scene with a for loop using javafx

  - by Susanta

  Following is a code fragment. I am updating a rectangle using a for loop when a button is pressed. This is a model for my ultimate intention of showing visualization of data model as it changes large number of times inside a for loop. It works but I see only one change. Now since I am changing the width randomly I should see large number of changes. It seems I am making a wrong assumption on something basic. The code goes below: 7 var rec: Rectangle = Rectangle { 8 x: 10, y: 10 9 width: 140, height: 90 10 fill: Color.BLACK 11 } 12 13 Stage { 14 title: "MyApp" 15 scene: Scene { 16 width: 200 17 height: 200 18 content: [ 19 rec, 20 Button { 21 text: "Button" 22 action: function () { 23 for (i in [1..999]) { 24 rec.width = 25 + java.lang.Math.random()*50; 25 } 26 } 27 } 28 ] 29 } 30 }

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• New to Maven-- Creating Java EE Projects

  - by M.C.

  Greetings-- I've been developing Java EE web apps with Eclipse for about a year. My employer doesn't use Maven, but the more I read about it, the more convinced I am that Maven + Hudson will be greatly beneficial for us. First, though, I have to become comfortable with those technologies in my spare time, so that I can create a proof-of-concept. Right now, I'm still a Maven newbie. Is there a set of best practices for creating Java EE web apps with Maven? For example, I could create a project with a basic archetype and then add all of the necessary JARs by putting dependencies in the POM for the servlet container, EJB, EclipseLink, etc... That might work, but it might not be the best way to do it. I'd greatly appreciate any guidance that you could provide on this topic. Thank you very much!

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• Not a statement?

  - by abelenky

  I have a simple little code fragment that is frustrating me: HashSet<long> groupUIDs = new HashSet<long>(); groupUIDs.Add(uid)? unique++ : dupes++; At compile time, it generates the error: Only assignment, call, increment, decrement, and new object expressions can be used as a statement HashSet.Add is documented to return a bool, so the ternary (?) operator should work, and this looks like a completely legitimate way to track the number of unique and duplicate items I add to a hash-set. When I reformat it as a if-then-else, it works fine. Can anyone explain the error, and if there is a way to do this as a simple ternary operator?

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• Android Java: Way to effectively pause system time while debugging?

  - by TheMaster42

  In my project, I call nanoTime and use that to get a deltaTime which I pass to my entities and animations. However, while debugging (for example, stepping through my code), the system time on my phone is happily chugging along, so it's impossible to look at, say, two sequential frames of data in the debugger (since by the time I'm done looking at the first frame, the system time has continued to move ahead by seconds or even minutes). Is there a programming practice or method to pause the system clock (or a way for my code to intercept and fake my deltaTime) whenever I pause execution from the debugger? Additional Information: I'm using Eclipse Classic with the ADT plugin and a Samsung SII, coding in Java. My code invoking nanoTime: http://pastebin.com/0ZciyBtN I do all display via a Canvas object (2D sprites and animations).

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• C struct print, decode this code?

  - by pauliwago

  I am in the process of studying for a test, and I'm trying to work through some practice problems. I've been working on this a while now..but can't figure it out. Please take a look at the code fragment: union { int i; short x; unsigned short u; float f; } testout; testout.i=0xC0208000; Before I ask the question, can someone please explain to me how the above code works?? My guess is that testout.i=0xC0208000 puts either an int, short, unsigned short, or float and puts the result in that address. (?) The question is what prints out if we write printf("%d", testout.x)? I know we should expect digits....but I have no idea where they are getting the digits from....there is no output. Any explanation would be greatly appreciated. Thanks!

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• Get name and value from the input tag

  - by DroidIn.net

  Before you say "oh no, not again" here I'm stating my case. I'm parsing part of HTML output and the only thing I'm interested in is name and value attributes of each <input/ tag. HTML is actually HTML fragment, may not be well-formed. I don't have DOM or HTML parser and I don't try to parse nested elements anyway. The problem is that I don't know the order or number of attributes so it could be <input name="foo" value="boo"/> or <input type="hidden" name=foo> or <input id=blah value='boo' src="image.png" name="foo" type="img"/>. Is there a single regular expression that would get me values of name and value attribute in predictable order? I wouldn't have asked the question if I could assume that name attribute always precedes value but unfortunately this is not the case

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• Can not export JARS in lwjgl!

  - by NerdyLegend

  I did it before but for some reason it's doing the stupid problem again. I want to export as a regular Jar file, not a folder full of files. I export it like in Oskar Veerhoak. cmd says Exception in thread "main" java.lang.RuntimeException: Resource not found: res/F lubberFlap.png at org.newdawn.slick.util.ResourceLoader.getResourceAsStream(ResourceLoa der.java:69) at com_FlubberSpace.MainFS.main(MainFS.java:118) I tested it out with my other project with the same code pretty much. This is how I load my Textures wood = TextureLoader.getTexture("PNG", ResourceLoader.getResourceAsStream("res/wood.png")); of course it works fine in eclipse but not after export. I havn't tried giving the previous game its' own project, I have it in a package. Can someone record how to export properly? I want a jar file that you just double click to start it. I also want it so nobody can extract the files and see my classes and res.

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• Why is the value of __name__ changing after assignment to sys.modules[__name__]?

  - by martineau

  While trying to do something similar to what's in the ActiveState recipe titled Constants in Python by Alex Martelli, I ran into an unexpected side-effect that assigning a class instance to an entry in sys.modules apparently has in Python 2.7 -- namely that doing so apparent changes the value of __name__ to None as illustrated in the following code fragment: class _test(object): pass import sys print '__name__: %r' % __name__ # __name__: '__main__' sys.modules[__name__] = _test() print '__name__: %r' % __name__ # __name__: None if __name__ == '__main__': # never executes... import test print "done" I'd like to understand why this is happening. I don't believe it was that way in Python 2.6 and earlier versions since I have some older code where apparently the if __name__ == '__main__': conditional worked as expected following the assignment (but no longer does). FWIW, I also noticed that the name _class is getting rebound from a class object to None, too, after the assignment. Also seems odd to me that they're being rebound to 'None' rather than disappearing altogether... Update: I'd like to add that any workarounds for achieving the effect of if __name__ == '__main__':, given what happens would be greatly appreciated. TIA!

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• Add CalendarView button to Google Maps API V2 - Android

  - by nirk

  I want to implement CalendarView / DatePicker button into my Google Map How can i do it ? On click of this button i want a small calendar to open and enable to pick a date from the calendar,when the date is picked i want to execute a function that i wrote. Thank you ! **The area marked with red doesn't exist right now : I want this button to open a datePicker https://imagizer.imageshack.us/v2/390x695q90/633/VyWT4l.jpg my activity xml right now looks like: <fragment xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/map" tools:context=".MapsActivity" android:name="com.google.android.gms.maps.SupportMapFragment"/>

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• 12.10 Unity GUI Not Displaying

  - by lolajl

  I had 12.04 installed and had no problems at all, having had it setup on my Compaq Presario CQ62 for about 2 weeks (I'm new to Ubuntu and I had a spare laptop to experiment with). Last night, I installed 12.10 through the update manager. Now, I'm not seeing the Unity GUI if I select Default or Ubuntu, at all, just the Eclipse launcher which I had created sitting on the desktop. Even hitting the Windows key to bring up Dash doesn't work. But, when I select GNOME during login, I'm able to access everything in the GUI, including the menu folders for games, internet, system settings, etc. There was a couple error message saying that a system file wasn't loading properly but I forgot to write these down, and now these error messages aren't loading when I restart. Will I need to wipe clean and reinstall?

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• How to parse the multipart data in a restful service...

  - by AXS

  I have written a restful web service in c# and .net using the Restful Starter Kit that receives a mime multipart form via a stream. The multipart form contains a small xml fragment and a small file binary. I have read the stream in, and I have also written some code to parse the data to obtain the XML and the file binary. However, I feel that there should be some methods already written in the .net classes to allow me to access the two parts of the multipart form without having to parse the data myself. Does anyone have any ideas on how to do this?

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• Quelles sont pour vous les plus belles applications de bureau développées en Java ? Partagez votre expérience

  Même si les applications Web prennent une part non négligeable dans le développement Java, de nombreuses applications de bureau sont encore très demandées. La plateforme Java via ses nombreuses bibliothèques graphiques (JavaFX, Swing, plateforme Eclipse, ...) permet de réaliser des applications de bureau très abouties. Nous vous invitons à partager les applications de bureau qui vous semblent les plus réussis et les plus à même de montrer la maturité de Java dans tous les domaines. Pour chaque application, merci de préciser un lien et un bref descriptif. A noter qu'un débat similaire avait été proposé il y a quelques années concernant

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• Record Name field in DNS responce

  - by Lescott

  I just read about DNS protocol, and found, that the name field can be writen in two ways: lenght of the next label the label lenght of the next label the label ... zero-byte pointer to the previous name field Next is the original article fragment: The Resource Record Name field is encoded in the same way as the Question Name field unless the name is already present elsewhere in the DNS message, in which case a 2-byte field is used in place of a length-value encoded name and acts as a pointer to the name that is already present. So, my question is, how can I determine the first or the second way is using in a package?

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• C++ developer looks for book(s) about Android apps & widgets (& services etc.) [on hold]

  - by Valmond

  I'm senior C++ developer, I have also programmed professionally j2me some years. I'd like to make some apps and widgets for Android and I'd like to read up a bit on this new java stuff Android is using. I have (of course) checked out some tutorials and so but it seems I miss the basics, I can compile some stuff (read: examples) in eclipse but I just don't know how to, for example, add a service or what an 'intent' is, why my widget isn't called but successfully launches the main app when clicked and so on. So, what is a really good book for someone that is a developer but mostly need the hard facts about developing something specific like Android apps & widgets? Thanks a bunch!

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• Android App crashing on one device only

  - by Daniel1402

  I am working on a new game that works perfectly on my test devices, 7-inch tablets and smartphones. But it crashes on my Galaxy Tab2 10-inch tablet with an Out of memory error. It always crashes when I start to play a second game! I have spent a full week checking the codes and I cannot figure out what is wrong. When I play from the menu screen, everything works fine. When I want to replay a game level from the level screen, the game will crash on the second launch. The level screen is made of 3 fragments, each with 32 buttons (4kB in size). I tried to keep only one fragment in memory with viewPager.setOffscreenPageLimit(1); but it does not solve the problem. Could someone stir me in some direction as to where to look for the potential problem? Why is the 10-inch tablet the only one to crash? Thanks.

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• Creating Java EE Projects with Maven

  - by M.C.

  I've been developing Java EE web apps with Eclipse for about a year. My employer doesn't use Maven, but the more I read about it, the more convinced I am that Maven + Hudson will be greatly beneficial for us. First, though, I have to become comfortable with those technologies in my spare time, so that I can create a proof-of-concept. Right now, I'm still a Maven newbie. Is there a set of best practices for creating Java EE web apps with Maven? For example, I could create a project with a basic archetype and then add all of the necessary JARs by putting dependencies in the POM for the servlet container, EJB, EclipseLink, etc... That might work, but it might not be the best way to do it. I'd greatly appreciate any guidance that you could provide on this topic.

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• Deprecated Preference Activity method

  - by Adnan Nazir

  package com.adi.preferencedemotest; i am working on PreferenceActivity but when i call my preference xml(prefs.xml) with the help of addPreferencesFromResource it says this method is deprecated and "This function is not relevant for a modern fragment-based PreferenceActivity" is there any alternative of this method? how i can handle ? public class PrefsActivity extends PreferenceActivity { @SuppressWarnings("deprecation") <------- @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.prefs); <------- } } Note: may be my question rate as duplicated but i didn't find any.

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• Need Regex for to match special situations

  - by Daniel

  I'm desperately searching for regular expressions that match these scenarios: 1) Match alternating chars I've a string like "This is my foobababababaf string" - and I want to match "babababa" Only thing I know is the length of the fragment to search - I don't know what chars/digits that might be - but they are alternating. I've really no clue where to start :( 2) Match combined groups In a string like "This is my foobaafoobaaaooo string" - and I want to match "aaaooo". Like in 1) I don't know what chars/digits that might be. I only know that they will appear in two groups. I experimented using (.)\1\1\1(.)\1\1\1 and things like this...

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• software development tools or technology [closed]

  - by user1783508

  Are there any technology or tools in which I can do ; * software requirement documentation * software design documentation * software test documentation * uml feature ( use case , flow chart, sequence diagram etc. ) EDIT : I want a tools like Eclipse. To be more precise, I can start many project via using same tool/technology. ex : [-] project1 [-] requirement [-] design [-] test [-} project2 [-] requirement [-] design [-] test I can use uml properties in the same tool/technology. After right clicking on the document or as a separate toolbar, it is seen. add ;Uml diagram create use case create class diagram create sequence diagram create flow chart etc.

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• How much memory can i safely use on android?

  - by xastor

  To make my game more fluid, I try to prevent memory allocations during the game I am writing. To that end, I allocate a whopping 16MB of buffers on startup and then use those as I go along. When I check in Eclipse my game now uses 24MB in total, which does not change noticeably during the game. This all works fine on the phone I have now (android 2.3, motorola defy) but I wonder if I'm going to run into problems with this on other phones or tablets that run android 2.2 or higher (which is what I'm aiming for)?

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• Java ME Embedded?Java Embedded Suite????

  - by ksky

  JavaOne 2012??????????????????????Java?2?????????????: Oracle Java ME Embedded ????? ??????? Java ME Embedded???????????????????????????Java???????????CLDC + IMP-NG???????????????130 KB RAM/350 KB ROM???????????????700 KB RAM/1.5 MB ROM???????????????????????????GPIO??????????????????API??XML?Web Service?Location????????API????????? ARM??????????(GUI?????)?????????M2M????????????????????????????????????????????????????NetbBans?Eclipse?????????SDK?????????????ARM KEIL?????(ARM Cortex M-3)????????????????????????? Oracle Java Embedded Suite ????? ??????? Java Embedded Suite??????Java???????????????????????????????1????????????????????????????????????????: Java SE Embedded 7 Java DB 10.8 GlassFish 3.1 Embedded Profile Jersey 1.11 ???Java ME Embedded????????????????????????Java??64MB RAM??70MB?ROM/Flash/Disk????????M2M???????????????????????????????????????????????????????????????????????ARMv6/7 Linux?????x86 Linux????????????????(??????????????)? ??2????????JavaOne?????????????Java Embedded @ JavaOne???????????????????????

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• Hibernate: delete many-to-many association

  - by Bar

  I have two tables with the many-to-many association. — DB fragment: loads Id Name sessions Id Date sessionsloads LoadId SessionId — Hibernate mapping fragments: /* loads.hbm.xml */ <set name="sessions" table="sessionsloads" inverse="true"> <key column="LoadId" /> <many-to-many column="SessionId" class="Session" /> </set> … /* sessions.hbm.xml */ <set name="loads" table="sessionsloads"> <key column="SessionId" /> <many-to-many column="LoadId" class="Load" /> </set> In order to remove one entry from the association table sessionsloads, I execute this code: Session session = sessionDao.getObject(sessionId); Load load = loadDao.getObject(loadId); load.getSessions().remove(session); loadDao.saveObject(load); But, after launching, this code change nothing. What's the right way to remove an association?

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