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• What are the advantages of LePUS3 over UML?

  - by Eric

  When searching online for object oriented concepts such as the composite design pattern I often found them represented in the LePUS3 notation. I am not really familiar with this modeling language. Is it something I should prefer over UML?

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• Enforce "equals" in an interface

  - by Fredrik

  I have an interface and I want everyone who implements this interface to implements an overrridden "equals" method. Is there a way to make sure that happens? The way I guess this will happen is that the class that implements my interface will automatically get the equals from Object therefore making the interface happy.

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• SWI-Prolog: how to load rdf triples using semweb/rdf_db library?

  - by Li Li

  Hi, I have a rdf file (file.trp) in n-triples format, where each line is: "subject predicate object ." I tried to use rdf_load in semweb/rdf_db to load it into memory, but failed. Here is what I tried: ?- rdf_load('file.trp'). ?- rdf_load('file.trp', [format(triples]). the manual says it supports xml and triples. But it only loads rdf xml files. How can I load such rdf triple file? Thanks, Li

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• How to access the elements in <script> inside the body tag

  - by Geetha

  Hi All, I am using <script> inside the body tag. <script type="text/javascript" language="javascript"> $('#audioVolume').text($('#audioVolume').text(Math.round((document.mediaPlayer.Volume + 2000) / 10) + "%")); </script> Error: Microsoft JScript runtime error: 'undefined' is null or not an object. Need: I want to access the html elements in <script inside the body tag.

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• How much memory does a hashtable use?

  - by Michael

  Would a hashtable/hashmap use a lot of memory if it only consists of object references and int's? As for a school project we had to map a database to objects (that's what being done by orm/hibernate nowadays) but eager to find a good way not to store id's in objects in order to save them again we thought of putting all objects we created in a hashmap/hashtable, so we could easily retrieve it's ID. My question is if it would cost me performance using this, in my opinion more elegant way to solve this problem.

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• Have main thread wait for a boost thread complete a task (but not finish).

  - by JAKE6459

  I have found plenty on making one thread wait for another to finish executing before continuing, but that is not what I wanted to do. I am not very familiar with using any multi-threading apis but right now I'm trying to learn boost. My situation is that I am using my main thread (the starting one from int main()) to create an instance of a class that is in charge of interacting with the main GUI. A class function is then called that creates a boost thread which in turn creates the GUI and runs the message pump. The thing I want to do is when my main thread calls the classes member function to create the GUI, I don't want that function to return until I tell it to from the newly created thread. This way my main thread can't continue and call more functions from the GUI class that interact with the GUI thread until that thread has completed GUI creation and entered the message loop. I think I may be able to figure it out if it was multiple boost thread objects interacting with each other, but when it is the main thread (non-boost object) interacting with a boost thread object, I get lost. Eventually I want a loop in my main thread to call a class function (among other tasks) to check if the user as entered any new input into the GUI (buy any changes detected by the message loop being updated into a struct and changing a bool to tell the main thread in the class function a change has occurred). Any suggestions for any of this would be greatly appreciated. This is the member function called by the main thread. int ANNGUI::CreateGUI() { GUIMain = new Main(); GUIThread = new boost::thread(boost::bind(&Main::MainThreadFunc, GUIMain)); return 0; }; This is the boost thread starting function. void Main::MainThreadFunc() { ANNVariables = new GUIVariables; WndProc = new WindowProcedure; ANNWindowsClass = new WindowsClass(ANNVariables, WndProc); ANNWindow = new MainWindow(ANNVariables); GUIMessagePump = new MessagePump; ANNWindow-ShowWindows(); while(true) { GUIMessagePump-ProcessMessage(); } }; BTW, everything compiles fine and when I run it, it works I just put a sleep() in the main thread so I can play with the GUI a little.

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• Submit event from few forms

  - by Coyod

  I have a two or more forms on my page in a row. I'm trying to hook submit event like: $('form',someObj).submit(function(e){ /* Do some stuff with ajax */ return false; }); But always receive events only from a first (by code) form. Also used each() function to bind event for each object, same thing.. What's wrong? Thanks!

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• Jquery: hot to sleep or delay?

  - by lazyanno

  i want move up the object, delay 1000ms , then hide it, i get the code: $("#test").animate({"top":"-=80px"},1500) .animate({"top":"-=0px"},1000) .animate({"opacity":"0"},500); i use ".animate({"top":"-=0px"},1000)" to implement delay, it's not good. i want: $("#test").animate({"top":"-=80px"},1500) .sleep(1000) .animate({"opacity":"0"},500); any idea? thanks! :)

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• How to cast a list of inheriting objects to a collection of objects in Java ?

  - by Kartoch

  I've a collection type: Collection<A> collecA And I've a list in my object: List<B> listB Where B is extending A class B extends A { ... } But I can't do the following: collecA = listB I can't understand why since Collection is implemented by List.

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• 'Subquery returned more than 1 value' problem in EntityFramework

  - by plotnick

  I have one 'Transaction' entity object with 'Operations' navproperty with multiplicity of 'Many'. When I'm adding only one operation per transaction nothing happens, but when I'm trying to add more than one operation, db.SaveChanges() throws an exception like 'Subquery returned more than 1 value blah, blah, blah' How can I solve that? Help me guys please... BTW... Could you tell me how can I see the exact query string that EF passes to Sql Server on db.SaveChanges() method?

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• Oracle export problem

  - by Abhiram

  I use exp username/password@servername owner={ownername} file=backuppath; The parameters given are correct but still not able to connect Below is the error trace: EXP-00056: ORACLE error 12545 encountered ORA-12545: Connect failed because target host or object does not exist EXP-00000: Export terminated unsuccessfully What can be the possible reasons?

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• Cast problem with LINQ

  - by yigit

  I'm tring to get my product's types to a list with Linq. var types = (from t in NHibernateSession.Linq<Product>() select t.Type).Distinct().ToList<Type>(); return types; But its giving an Unable to cast object of type error '...Domain.Product' to type '...Domain.Type'. Please tell where am I going wrong.

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• class ProfilePresenter < ActionView::Base | url_for doesn't work. why?

  - by Totty

  class ProfilePresenter < ActionView::Base def initialize super url_for # i got: You have a nil object when you didn't expect it! # The error occurred while evaluating nil.url_for end end url_for doesn't work. why? i make a new instance like this ProfilePresenter.new

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• Hibernate (JPA) Entity with Static collection as a member

  - by Kyle Partridge

  Is it possible to have a static collection as a member of a hibernate entity? Say I have an object Question: public class Question { private String category; ... } Would it be possible to populate a static Set<String> that is a distinct set of all categories in the Database? I know I could just query this, but I was wondering if there was a more elegant solution, as it seems like something that other people may have come across.

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• Stack Info button above UIView in Utility App

  - by bgw

  I've started creating a iPhone Utility app (main view and flip view). I want to draw some graphics in the Main view, so I dragged a UIView object onto it. This works, but I find that if I resize the UIView to fill the Main view, it covers the Info button that invokes the Flip view. Is there any way to get the Info button to appear on top of the UIView? In IB? In code?

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• How to convert elements of NSMutableArray to NSString

  - by user174761

  I have 1 NSMutableArray and I want to convert whatever data in array will be in NSString. tell me code for that. Array is nothing but object of NSMutableArray class.

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• jquery ajax: headers seem to not be working

  - by Will

  hello, i am trying to get the headers of an ajax request i made through jquery $.get(url, function(response, textStatus, headers ) { console.log("Response: %o", response); console.log("TextStatus: %o", textStatus); console.log("Request: %o", headers); } ); this does not seem to be working however: the response and textstatus are printing, but the "headers" object seems to be undefined i simply want to check if it is what i expect (content type='excel', etc) or if the response type is html, i can assume the page i was calling is an error

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• Jquery return value

  - by Anton

  I used a code: jQuery.fn.MyFunction = function(){ return this.each(function() { attributes = "test"; return attributes; });} But when I call var1 = $(this).MyFunction();alert(var1); I got an [object], but not the "test". How to allow jquery plugin return a some value?

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• When log shows a lot of GC hits, what code change shall we need?

  - by Pentium10

  When log shows a lot of Garbage Collection hits, what code change shall we need? Do we need to free some objects? Will we speed up the code with object reusal?

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• Is there a clever way to pass the key to defaultdict's default_factory?

  - by Paul Oyster

  A class has a constructor which takes one parameter: class C(object): def __init__(self, v): self.v = v ... Somewhere in the code, it is useful for values in a dict to know their keys. I want to use a defaultdict with the key passed to newborn default values: d = defaultdict(lambda : C(here_i_wish_the_key_to_be)) Any suggestions?

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• Methods and garbage collection

  - by cc

  I encountered this question in an interview: Is an object created inside of a method eligible for garbage collection after the method is finished? Is yes the correct answer?

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• Jquery: how to sleep or delay?

  - by lazyanno

  i want move up the object, delay 1000ms , then hide it, i get the code: $("#test").animate({"top":"-=80px"},1500) .animate({"top":"-=0px"},1000) .animate({"opacity":"0"},500); i use ".animate({"top":"-=0px"},1000)" to implement delay, it's not good. i want: $("#test").animate({"top":"-=80px"},1500) .sleep(1000) .animate({"opacity":"0"},500); any idea? thanks! :)

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• Passing around an ElementTree

  - by PulpFiction

  Hello. In my program, I need to make use of an ElementTree object in various functions in my program. More specifically, I am doing this: tree = etree.parse('somefile.xml') I am passing this tree around in my program. I was wondering whether this is a good approach, or can I do this: Create a global tree (I come from a C++ background and I know global is bad) Create the tree again wherever required. Or is my approach ok?

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• setter injection guice + wicket

  - by chris-gr

  Hi, I have a Wicket Web Page where I create a new Object of class A: A a = new A(User u); In A I would like to have setter injection, however this is actually not done. I have heard that one must provide an empty constructor but how is it possible to have also a non - empty constructor with setter injection?

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• How to call a PHP class member function from a Java file?

  - by Jack

  I am using PHP/Java bridge to run PHP scripts on the Tomcat server. Can someone point me to an example as to how to call my PHP scripts from a Java file. <?php class X{ //variables //functions } ?> Now I want to call the member functions of class X using its object via a Java file. How do I do this?

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