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• Question about fileconnection class in Java

  - by cancelledout

  I have a JavaME application called ParseExample. I can't seem to access the files inside the project's folders using the code below. FileConnection fconn = (FileConnection) Connector.open("{__DIR__}service1.xml", Connector.READ_WRITE); Here is the structure: ParseExample -Source Packages -XMLCreatorExample.java -service1.xml --- I want to read and write to this file Sorry for the noob question. Am I using this wrong? What path should be used? Or is there any other class that is supposed to be used instead of this?

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• simple scala question about httpparser

  - by kula

  hi all. i'm a scala newbee. i have one question. in my code ,i try to import httpparse library like this scalac -classpath /home/kula/code/201005/kookle/lib/htmlparser.jar crawler.scala and i run this code. scala main and it tell me that java.lang.NoClassDefFoundError: org/htmlparser/Parser at FetchActor$$anonfun$act$1$$anonfun$apply$1.apply(crawler.scala:21) at FetchActor$$anonfun$act$1$$anonfun$apply$1.apply(crawler.scala:13) at scala.actors.Reaction.run(Reaction.scala:78) at scala.actors.FJTask$Wrap.run(Unknown Source) at scala.actors.FJTaskRunner.scanWhileIdling(Unknown Source) at scala.actors.FJTaskRunner.run(Unknown Source) i check the file./home/kula/code/201005/kookle/lib/htmlparser.jar and it is no problem.anyone can tell me how cause this bug?

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• Question regarding common class

  - by Rocky Singh

  I have following two classes: public class A : System.Web.UI.WebControls.Button { public virtual string X { get { object obj = ViewState["X"]; if (obj != null) return (string)obj; return null; } set { ViewState["X"] = value; } } protected override void OnLoad(EventArgs e) { X=2; } } and public class B : System.Web.UI.WebControls.TextBox { public virtual string X { get { object obj = ViewState["X"]; if (obj != null) return (string)obj; return null; } set { ViewState["X"] = value; } } protected override void OnLoad(EventArgs e) { X=2; } } As you must be seeing the class A and B have exactly the same code , my question is how can I make a common class for it and use these two classes.

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• .NET Deployment of Interface/Classes for Command Pattern Question

  - by Jonno

  In theory I would like to produce 2 projects: 1) Asp.net (Sever A) 2) DAL running (Server B) I would like to utilise command objects to comunicate with the DAL. ASP.net instantiates a command class e.g. CmdGetAllUsers which impliments IMyCommand interface and sends it to the DAL (using ASMX or WCF). My question is: Would the class definition of CmdGetAllUsers need to exist on the DAL server? Or would having the interface definition be enough? My goal is to reduce the need to redeploy the DAL code, and have it as a fairly simple pass-through layer. Many thanks for your time.

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• Color space - RGB and YCbCr question

  - by HardCoder1986

  Hello! I am now trying to understand how JPEG encoding works and everything seems fine except the color transformation part. Before attempting to do a DCT in JPEG algorithm, the image is transformed into YCbCr color space. To me this essentially means that we just (comparing to initial RGB image) take a chunk of color information and dispose it while applying the RGB -> YCbCr transformation. So, our encoding steps look generally like RGB -> YCbCr -> DCT -> Huffman. The decoding means inversing this process. And my question is - why does the image (for example, created and exported to JPEG) remain the same in terms of color, although we have to make inverse YCbCr -> RGB transform. Where does the disposed part of color information comes from or how is it handled?

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• Logical python question - handeling directories and files in them

  - by Konstantin

  Hello! I'm using this function to extract files from .zip archive and store it on the server: def unzip_file_into_dir(file, dir): import sys, zipfile, os, os.path os.makedirs(dir, 0777) zfobj = zipfile.ZipFile(file) for name in zfobj.namelist(): if name.endswith('/'): os.mkdir(os.path.join(dir, name)) else: outfile = open(os.path.join(dir, name), 'wb') outfile.write(zfobj.read(name)) outfile.close() And the usage: unzip_file_into_dir('/var/zips/somearchive.zip', '/var/www/extracted_zip') somearchive.zip have this structure: somearchive.zip 1.jpeg 2.jpeg another.jpeg or, somethimes, this one: somearchive.zip somedir/ 1.jpeg 2.jpeg another.jpeg Question is: how do I modify my function, so that my extracted_zip catalog would always contain just images, not images in another subdirectory, even if images are stored in somedir inside an archive.

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• StringBuilder related question

  - by Sef

  I have written a program for a stack. (http://stackoverflow.com/questions/2617367?tab=votes#tab-top) For this i needed a StringBuilder to be able to show me what was in the stack else i would get the class name instead of the actual values inside. My question is there any other way except for a StringBuilder for such kind of problem? Also in what other kind of cases does this kind of problem happen? Also the way i have written the StringBuilder felt very awkward when i needed several things on 1 line. public override string ToString() { StringBuilder builder = new StringBuilder(); foreach (int value in tabel) { builder.Append(value); builder.Append(" "); } if (tabel.Length == tabel.Length) // this is a bit messy, since I couldn't append after the rest above { builder.Append("(top:"); builder.Append(top); builder.Append(")"); } return builder.ToString(); }/*ToString*/

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• search engine (solr/sphinx) question

  - by noname

  i want to make my threads content searchable with full text search engines like solr. but i wonder one thing. should i index just the thread.title, thread.body and post.body or should i index username, created date, nr of posts, views, country, region and city too that belongs to thread? i mean when an user search for a thread he will get hits returned containing thread title, 2 lines of body, which user has posted it, creation date, tags, and so on. should i index all this information too? but then it would be pretty much the whole database. or should i just index the 3 first columns i mentioned for full text search. and another question. when an user post a new thread, then i have to immidiately tell solr to add that row? if im not, how would it be searchable?

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• SQL trigger for audit table question

  - by mattgcon

  I am writing a trigger to audit updates and deletes in tables. I am using SQL Server 2008 My questions are, Is there a way to find out what action is being taken on a record without going through the selection phase of the deleted and inserted tables? Another question is, if the record is being deleted, how do I record within the audit table the user that is performing the delete. (NOTE: the user connected to the database is a general connection string with a set user, I need the user who is logged into either a web app or a windows app) Please help?

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• StructureMap Question

  - by derans

  This is the equivalent of what I'm trying to create with StructureMap: new ChangePasswordWithNotificationAndLoggingService( new ChangePasswordService( new ActiveDirectoryRepository(new ActiveDirectoryCredentials()), new TokenRepository("")), new EmailNotificationService(new PasswordChangedNotification(new UserAccount())), new LoggingService()); This is what I have right now: ForRequestedType<IChangePasswordService>() .TheDefault.Is.ConstructedBy(() => new ChangePasswordService(DependencyRegistrar.Resolve<IActiveDirectoryRepository>(), DependencyRegistrar.Resolve<ITokenRepository>())) .EnrichWith<IChangePasswordService>(x => new ChangePasswordWithNotificationAndLoggingService(x, DependencyRegistrar.Resolve<INotificationService>(), DependencyRegistrar.Resolve<ILoggingService>())); I need to pass the UserAccount to the INotificationService...can't figure it out. I've tried this: DependencyRegistrar.With(new UserAccount { Username = "test" }); No luck...UserAccount always turns out null. I don't have to do it all with StructureMap, I'm open to any suggestions. This is what I currently have working: public static IChangePasswordService ChangePasswordService(UserAccount userAccount) { return new ChangePasswordWithNotificationService( new ChangePasswordService(ActiveDirectoryRepository(), TokenRepository()), new EmailNotificationService(new PasswordChangedNotification(userAccount))); }

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• Quick strlen question

  - by LearningC

  Hi again. I've come to bother you all with another probably really simple C question. Using the following code: int get_len(char *string){ printf("len: %lu\n", strlen(string)); return 0; } int main(){ char *x = "test"; char y[4] = {'t','e','s','t'}; get_len(x); // len: 4 get_len(y); // len: 6 return 0; } 2 questions. Why are they different and why is y 6? Thanks guys.

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• Socket programming question

  - by dfddf

  I am given the following declaration: char inbuff[500], *ptr; int n, bufferlen; Write a program segement to receive a message having 500 bits from the TCP socket sock and store this message in inbuff. My answer is: n = recv( sock, inbuff, strlen( inbuff ), 0 ); However, I am not sure why *ptr is given in the declaration. So, I would like ask, what is the purpose of the pointer in this question?? Or my program segement is wrong? Thank you for all of yours help first!

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• Basic PHP question for Drupal Views theming

  - by oalo

  My PHP and programming knowledge is extremely basic, so this is probably a dumb question: I am theming a View in Drupal 6, and I want to add an id with a consecutive number to each item in the view (first item would have the id #item1, the second #item2, etc). I am customizing the style output (views-view-unformatted--MYVIEWNAME.tpl.php) and the row style output (views-view-fields--MYVIEWNAME.tpl.php), and I want to add a counter variable in the foreach loop in the style output tpl, and then use that variable in the row style output tpl, but the last one is not recognizing the variable. It does not give me any errors, but doesnt print the number. I understand this has probably something to do with variables visibility, how can I declare the counter variable in the style .tpl so I can the use it in the row style .tpl? Thank you

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• Ridiculously Simple Erlang Question

  - by Aiden Bell

  Read (skimmed enough to get coding) through Erlang Programming and Programming Erlang. One question, which is as simple as it sounds: If you have a process Pid1 on machine m1 and a billion million messages are sent to Pid1, are messages handled in parallel by that process (I get the impression no) and is there any guarantee of order when processing messages? ie. Received in order sent? Coming from the whole C/Thread pools/Shared State background ... I want to get this concrete. I understand distributing an application, but want to ensure the 'raw bones' are what I expect before building processes and distributing workload. Also, am I right in thinking the whole world is currently flicking through Erlang texts ;)

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• Database Design Question

  - by deniz

  Hi, I am designing a database for a project. I have a table that has 10 columns, most of them are used whenever the table is accessed, and I need to add 3 more rows; View Count Thumbs Up (count) Thumbs Down (Count) which will be used on %90 of the queries when the table is accessed. So, my question is that whether it is better to break the table up and create new table which will have these 3 columns + Foreign ID, or just make it 13 columns and use no joins? Since these columns will be used frequently, I guess adding 3 more columns is better, but if I need to create 10 more columns which will be used %90 of the time, should I add them as well, or create a new table and use joins? I am not sure when to break the table if the columns are used very frequently. Do you have any suggestions? Thanks in advance,

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• Question about when and when not to raise events (C#)

  - by NoPyGod

  I am programming an instant messaging library for MSN Messenger, and I have a simple question about raising events. When logging in, should I be raising UserAdded for each user that is synchronized (already on the contact list), or should the UserAdded event be reserved for when a new user has been added to the contact list via the AddUser method? Should I perhaps use another event, UserDownloaded for when a user is downloaded? Similarly, when I call logout, should I call UserRemoved? I hope this makes sense. Thank you

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• NSMutableSet addObject question

  - by Jacob Relkin

  I've got a class that wraps around an NSMutableSet object, and I have an instance method that adds objects (using the addObject: method) to the NSMutableSet. This works well, but I'm smelling a performance hitch because inside the method i'm explicitly calling containsObject: before adding the object to the set. Three part question: Do I need to be calling containsObject: before I add an object to the set? If so, then what actual method should I be using, containsObject or containsObjectIdenticalTo:? If that is not so, what contains method gets invoked under the hood of addObject:? This is important to me because if I pass an object to containsObject: it would return true, but if I pass it to containsObjectIdenticalTo: it would return false.

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• Simple Java question

  - by user322102

  Hi All I new to java so bare with me if this is a ridiculously simple question but I am curious about this method call which has {code} being taken in - see code below for an example in the method addSelectionListener. What is the purpose of this? I have been looking through docs for an explaination but cant seem to find what this practice is called never mind any useful information. setStatusLine.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { String message = "I would like to say hello to you."; if (pressed) { message = "Thank you for using me"; } setStatusLine(message); pressed = !pressed; } }); Thanks for any help or insights that can be offered

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• AutoComplete implementation - Interview Question

  - by user181218

  Hi, Say you have a DB table with two cols: SearchPhrase(String) | Popularity(Int). You need to initialize a DS so that you could use it to implement an autocomplete feature (like google suggest) comfortably. The requirement: Once the data from the db is processed into the data structure, when you type a letter you get the 10 most popular searchphrases from the db starting with that letter,then when you type the next one you get the 10 .... with these two letters and so on. The question only concerns planning the ds and pseudocoding Insert,Search etc. Note: YOU CANNOT USE TRIE DS. Any ideas?

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• Beginner Java Question about Integer.parseInt() and casting

  - by happysoul

  so when casting like in the statement below :- int randomNumber=(int) (Math.random()*5) it causes the random no. generated to get converted into an int.. Also there's this method I just came across Integer.parseInt() which does the same ! i.e return an integer Why two different ways to make a value an int ? Also I made a search and it says parseInt() takes string as an argument.. So does this mean that parseInt() is ONLY to convert String into integer ? What about this casting then (int) ?? Can we use this to convert a string to an int too ? sorry if it sounds like a dumb question..I am just confused and trying to understand Help ?

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• Jquery .Filter Function Question

  - by Matias

  Hi Guys, This is kindof a simple question, however, I don´t seem to figure out how to do it: I´ve got a slider filtering some stuff $("#price").slider( { range: true, step: 5, change: function(e,ui) { $('total').filter(function(index) { return ( ($("#price").slider("values", 0)) <= $(this).text() <= ($("#price").slider("values", 1))); }).parents('div.item').hide(); } }); Basically, I want an array with index of each of elements which have been filtered so I can reuse them for other purpose. I was thinking of editing filter function to something like: $('total').filter(function(index) { var matches = ( ($("#price").slider("values", 0)) <= $(this).text() <= ($("#price").slider("values", 1))); return matches; }.myFunction(matches){ //do some stuff here with matched elements } This is not correct, your help is greatly appreciated.

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• Naive question about implementing RSS

  - by interstar

  I have a naive question about RSS feeds. I have a series of timed events which appear on my site and that I make available as an RSS feed for other applications to import. Who is typically responsible for truncating this feed? Over the next year, I can see my feed having thousands of items. Should the URL mysite.com/rss always return all items? And leave it to the readers to just show the most recent? Or is it more customary that I only return, say, the top 50? Expecting the readers to cache older items? (And, if so, is there a convention for readers to ask the server for the "next page")? What is the typical behaviour of something like FriendFeed when it pulls in an RSS stream?

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• programming question about numbers

  - by Syom

  it's a task, on which i think during whole day. i have four integer numbers a, b, c, d, and ineger x[1,40]. i must write a program, which can find the values of {a,b,c,d}, for which one of following equations is true for any (x<=40, x=1) x=a or x=b or x=a+b or x=a+b+c+d or x+a=c+d or x+a+b=c+d or ... x+a+b+c=d or ... it is very difficult to explain what i want to say. maybe the example will be helpful. example: if x=17, by {a=1,b=2,c=5,d=15} i can write x+a+b=c+d whole question is to present any x[1,40] by {a,b,c,d}. hope that you understand what i want to say, and thanks in advance

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• F# books question

  - by Michiel Borkent

  I am now reading Foundations of F# by Robert Pickering and parallelly the book in progress 'Real World Functional Programming' by Tomas Petricek. My question is, what is the added value I would get from buying and reading the following books: 1) Expert F# by Don Syme and others 2) F# for Scientists by John Harrop Are those books still up to date with the current CTP version. What are things to keep notice of with respect to the recent changes in the language? Will there be reprinted updated versions? Also I want to learn more about datamining techniques with F# as a tool for this. What are good books to read next on this topic?

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• Open an Application .exe window inside another application

  - by jpnavarini

  I have an application in WPF running. I would like that, when a button is clicked inside this application, another application opens, with its window maximized. However, I don't want my first application to stop and wait. I want both to be open and running independently. When the button is clicked again, in case the application is minimized, the application is maximized. In case it is not, it is open again. How is it possible using C#? I have tried the following: Process process = Process.GetProcesses().FirstOrDefault(f => f.ProcessName.Contains("Analysis")); ShowWindow((process ?? Process.Start("..\\..\\..\\MS Analysis\\bin\\Debug\\Chemtech.RT.MS.Analysis.exe")).MainWindowHandle.ToInt32(), SW_MAXIMIZE); But the window does not open, even though the process does start.

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