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  • How to make a GRANT persist for a table that's being dropped and re-created?

    - by Eli Courtwright
    I'm on a fairly new project where we're still modifying the design of our Oracle 11g database tables. As such, we drop and re-create our tables fairly often to make sure that our table creation scripts work as expected whenever we make a change. Our database consists of 2 schemas. One schema has some tables with INSERT triggers which cause the data to sometimes be copied into tables in our second schema. This requires us to log into the database with an admin account such as sysdba and GRANT access to the first schema to the necessary tables on the second schema, e.g. GRANT ALL ON schema_two.SomeTable TO schema_one; Our problem is that every time we make a change to our database design and want to drop and re-create our database tables, the access we GRANT-ed to schema_one went away when the table was dropped. Thus, this creates another annoying step wherein we must log in with an admin account to re-GRANT the access every time one of these tables is dropped and re-created. This isn't a huge deal, but I'd love to eliminate as many steps as possible from our development and testing procedures. Is there any way to GRANT access to a table in such a way that the GRANT-ed permissions survive a table being dropped and then re-created? And if this isn't possible, then is there a better way to go about this?

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  • Haskell Linear Algebra Matrix Library for Arbitrary Element Types

    - by Johannes Weiß
    I'm looking for a Haskell linear algebra library that has the following features: Matrix multiplication Matrix addition Matrix transposition Rank calculation Matrix inversion is a plus and has the following properties: arbitrary element (scalar) types (in particular element types that are not Storable instances). My elements are an instance of Num, additionally the multiplicative inverse can be calculated. The elements mathematically form a finite field (??2256). That should be enough to implement the features mentioned above. arbitrary matrix sizes (I'll probably need something like 100x100, but the matrix sizes will depend on the user's input so it should not be limited by anything else but the memory or the computational power available) as fast as possible, but I'm aware that a library for arbitrary elements will probably not perform like a C/Fortran library that does the work (interfaced via FFI) because of the indirection of arbitrary (non Int, Double or similar) types. At least one pointer gets dereferenced when an element is touched (written in Haskell, this is not a real requirement for me, but since my elements are no Storable instances the library has to be written in Haskell) I already tried very hard and evaluated everything that looked promising (most of the libraries on Hackage directly state that they wont work for me). In particular I wrote test code using: hmatrix, assumes Storable elements Vec, but the documentation states: Low Dimension : Although the dimensionality is limited only by what GHC will handle, the library is meant for 2,3 and 4 dimensions. For general linear algebra, check out the excellent hmatrix library and blas bindings I looked into the code and the documentation of many more libraries but nothing seems to suit my needs :-(. Update Since there seems to be nothing, I started a project on GitHub which aims to develop such a library. The current state is very minimalistic, not optimized for speed at all and only the most basic functions have tests and therefore should work. But should you be interested in using or helping out developing it: Contact me (you'll find my mail address on my web site) or send pull requests.

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  • Webservices on iPhone - wsdl2objc - Sample Code?

    - by markmcgookin
    I have recently downloaded the most recent build of this awesome tool WSDL2OBJC from google code here: http://code.google.com/p/wsdl2objc/ After a bit of tweaking and downloading the latest version of the trunk from the svn repo I got a version that created the code for a WSDL I am using and compiles great and actually installs on my phone! However, I'm not doing anything with it yet, because I am not really sure how to. There is very little in the way of sample code on the site, and there is a sample file in the project if you download it, but again it is very complicated and there are no real bits of documentation. Has anyone managed to successfully use this stuff? It seems SOOO powerful and useful but from a look around the Internet, no one knows how to use it. We (all) would love someone who has figured it out to post a simple project or detailed walk-through of implementing this so we can put the code that lots of people have worked hard on to good use. If anyone has found a blog entry or has this information it would be great to see! I am totally stuck... with no errors. I would love to know how to use this now that it's all compiled successfully!

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  • Java FileLock for Reading and Writing

    - by bobtheowl2
    I have a process that will be called rather frequently from cron to read a file that has certain move related commands in it. My process needs to read and write to this data file - and keep it locked to prevent other processes from touching it during this time. A completely separate process can be executed by a user to (potential) write/append to this same data file. I want these two processes to play nice and only access the file one at a time. The nio FileLock seemed to be what I needed (short of writing my own semaphore type files), but I'm having trouble locking it for reading. I can lock and write just fine, but when attempting to create lock when reading I get a NonWritableChannelException. Is it even possible to lock a file for reading? Seems like a RandomAccessFile is closer to what I need, but I don't see how to implement that. Here is the code that fails: FileInputStream fin = new FileInputStream(f); FileLock fl = fin.getChannel().tryLock(); if(fl != null) { System.out.println("Locked File"); BufferedReader in = new BufferedReader(new InputStreamReader(fin)); System.out.println(in.readLine()); ... The exception is thrown on the FileLock line. java.nio.channels.NonWritableChannelException at sun.nio.ch.FileChannelImpl.tryLock(Unknown Source) at java.nio.channels.FileChannel.tryLock(Unknown Source) at Mover.run(Mover.java:74) at java.lang.Thread.run(Unknown Source) Looking at the JavaDocs, it says Unchecked exception thrown when an attempt is made to write to a channel that was not originally opened for writing. But I don't necessarily need to write to it. When I try creating a FileOutpuStream, etc. for writing purposes it is happy until I try to open a FileInputStream on the same file.

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  • Pros and cons of making database IDs consistent and "readable"

    - by gmale
    Question Is it a good rule of thumb for database IDs to be "meaningless?" Conversely, are there significant benefits from having IDs structured in a way where they can be recognized at a glance? What are the pros and cons? Background I just had a debate with my coworkers about the consistency of the IDs in our database. We have a data-driven application that leverages spring so that we rarely ever have to change code. That means, if there's a problem, a data change is usually the solution. My argument was that by making IDs consistent and readable, we save ourselves significant time and headaches, long term. Once the IDs are set, they don't have to change often and if done right, future changes won't be difficult. My coworkers position was that IDs should never matter. Encoding information into the ID violates DB design policies and keeping them orderly requires extra work that, "we don't have time for." I can't find anything online to support either position. So I'm turning to all the gurus here at SA! Example Imagine this simplified list of database records representing food in a grocery store, the first set represents data that has meaning encoded in the IDs, while the second does not: ID's with meaning: Type 1 Fruit 2 Veggie Product 101 Apple 102 Banana 103 Orange 201 Lettuce 202 Onion 203 Carrot Location 41 Aisle four top shelf 42 Aisle four bottom shelf 51 Aisle five top shelf 52 Aisle five bottom shelf ProductLocation 10141 Apple on aisle four top shelf 10241 Banana on aisle four top shelf //just by reading the ids, it's easy to recongnize that these are both Fruit on Aisle 4 ID's without meaning: Type 1 Fruit 2 Veggie Product 1 Apple 2 Banana 3 Orange 4 Lettuce 5 Onion 6 Carrot Location 1 Aisle four top shelf 2 Aisle four bottom shelf 3 Aisle five top shelf 4 Aisle five bottom shelf ProductLocation 1 Apple on aisle four top shelf 2 Banana on aisle four top shelf //given the IDs, it's harder to see that these are both fruit on aisle 4 Summary What are the pros and cons of keeping IDs readable and consistent? Which approach do you generally prefer and why? Is there an accepted industry best-practice?

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  • Is This a Valid Way to Use Blocks in Objective-C?

    - by Carter
    I've been building a HTTP client that uses web services to synchronize information between the client and server. I've been using Blocks and NSURLConnection to achieve this on the client side, but I'm getting frequent EXC_BAD_ACCESS crashes in objc_msgSend(). From what I understand, this usually means that a stored block that has fallen off the stack has been called. I think I've coded things correctly to avoid this, but I'm still stuck. Here is conceptually what my code is doing. It starts by calling "synchronizeWithWebServer". That method invokes "listRootObjectsOnServerWithBlock:" which takes in a block to be called when the method returns. "listRootObjectsOnServersWithBlock:" initiates a NSURLConnection to the web server asynchronously. It to expects a block to be called when it returns. Inside that block I want to be able to execute the original Block (so aptly named 'block'). This is only a simplified version of my code. The real synchronization process is more complex but it's mostly more of the same as what you see below. Sometimes the code works perfectly, but about 80% of the time it crashes very early on in the routine. It seems to be more vulnerable to crashing when my data set gets larger. - (void)synchronizeWithWebServer { [self listRootObjectsOnServerWithBlock:^(NSArray *results, NSError *error) { //Iterate over result objects and perform some other similar routines. }]; } - (void)listRootObjectsOnServerWithBlock:(void (^)(NSArray *results, NSError *error))block { //Create NSURLRequest Here //Create connection asynchronously. block = [block copy]; [NSURLConnection sendAsynchronousRequest:urlRequest queue:[NSOperationQueue currentQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error){ //Parse response from web server (stored in NSData *data) NSArray *results = ..... //Call 'block' block(results, error); [block release]; }]; }

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  • How to correctly set the ORACLE_HOME variable on Ubuntu 9.x?

    - by nowarninglabel
    I have the same problem as listed here: http://stackoverflow.com/questions/52239/oracle-lost-sysdba-password although I did not lose the password, I entered it twice in the configure script originally, and then when I went to login (localhost:8080/apex, password not accepted. I don't have anything in the database, I just want to install and use Oracle-XE. I have tried apt-get removing it twice and reinstalling, but if I try to run /etc/init.d/oracle-xe configure again and I get "Oracle Database 10g Express Edition is already configured" despite the second time removing any folders I could find for Oracle XE. I tried running sqlplus "/ as sysdba" but all I get is: "Error 6 initializing SQL*Plus Message file sp1.msb not found SP2-0750: You may need to set ORACLE_HOME to your Oracle software directory" I tried setting the variable via export. (also tried set). Tried: "export ORACLE_HOME=/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/bin/sqlplus" and all the subdirectories of that. Same error every time. What is the ORACLE_HOME supposed to be set to? The only reference I have seen either just say general or say the above up to the version number then "/db_1". I do no thave a db_1. Let me know if need any clarification. Don't understand what I did wrong in this process.

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  • Jquery $.get against ASP.NET MVC not working in Opera and Firefox

    - by codelove
    Let me first put the code snippets here. I am just using the ASP.NET MVC project Visual Studio creates out of the box. So I am just putting the snippets I added to it: Site.master's head section: <head runat="server"> <title><asp:ContentPlaceHolder ID="TitleContent" runat="server" /></title> <script src="../../Scripts/jquery-1.3.2.min.js" type="text/javascript"></script> <link href="../../Content/Site.css" rel="stylesheet" type="text/css" /> <script src="../../Scripts/test.js" type="text/javascript"></script> <script type="text/javascript">$(document).ready(ready);</script> </head> Content of test.js: function ready(){ $.get("/Home/TestAjax", ajaxResponse); } function ajaxResponse(data){ alert("got response from server: " + data); } Method in HomeController: public String TestAjax() { if (Request.IsAjaxRequest()) { return "Got ajax request!"; } else { return "Non-ajax request"; } } Now the problem I am seeing in Firefox 3.5.30729 (Firebug) is when the ajax request goes out, IIS 7 on the remote box sends Http 302 back, which does the redirect and forces another get request, but it is not asynchronous. Opera also doesn't work so I assume it is the same problem. However, above code works just fine in IE 8, Chrome, and Safari. On localhost all of the above browsers work as expected including Firefox and Opera -- they all receive "Got ajax request!" as the response from the server. Anybody have any ideas what's going on here and how to fix it? I am looking for a real solution or at least explanation as to what is going on and why.

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  • How to Extract data asocaited with attribute of XML file using python 3.2

    - by user1460383
    I have this xml format..... <event timestamp="0.447463" bustype="LIN" channel="LIN 1"> <col name="Time"/> <col name="Start of Frame">0.440708</col> <col name="Channel">LIN 1</col> <col name="Dir">Tx</col> <col name="Event Type">LIN Frame (Diagnostic Request)</col> <col name="Frame Name">MasterReq_DB</col> <col name="Id">3C</col> <col name="Data">81 06 04 04 FF FF 50 4C</col> <col name="Publisher">TestMaster (simulated)</col> <col name="Checksum">D3 &quot;Classic&quot;</col> <col name="Header Duration">2.090 ms (40.1 bits)</col> <col name="Resp. Duration">4.688 ms (90.0 bits)</col> <col name="Time difference">0.049987</col> <empty/> </event> In above xml, i need to extract data associated with attribute 'name' Am able to get all names but am unable to fetch MasterReq_DB< field Please help me ... Thanks in advance

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  • SQL Full-Text Indexing Issue

    - by Phil
    UPDATE: I have figured out a way using a form of dynamic sql to fix this problem, thanks anyway for any help. Hi, there is something that I need to accomplish with the use of Full-Text Indexing. This is it: The fact of the matter is when I run a query (with a stored procedure) that looks like (with a parameter (@name) that was obviously defined above (not shown here), this parameter is sent to the stored procedure by an asp.net page, from user input): SELECT Name FROMdbo.UsersTable WHERE FREETEXT(Name, @name) Well, the fact of the matter is that a query like this will return values if, say the parameter @name's value is Joe, and say, there are 10 records of names with Joe in them, but if @name's value is just Jo, then it returns nothing, and this is the problem. Say that there are other records in this table that have Jo in them, like for example, Jole, or John. So the real question is, how do I get it to return values that are not full words, or phrases, but just from part of the word/phrase (like I said above)? Like FREETEXT(Name, @name*), which is not allowed to be used as a query, but, you get the idea. Is there a way to accomplish this? I'm sure there must be, I need to figure this out. Thanks for any help.

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  • Spinner in Android crashing when visibilty changes while handling OnClick in a button

    - by Dave George
    I have a spinner in UI, which I want to hide when I handle onClick method for a button. But the application is crashing all the time. Is it that I can't use the setVisibility(View.Gone) on spinners (it is not written anywhere). If I comment it out, then application run fine. I am getting NullPointerException and I am using RelativeLayout. Also, can I do this: public void onItemSelected(AdapterView<?> arg0, View view, int pos, long arg3) { // TODO Auto-generated method stub Toast.makeText(SpinnerActivity.this,selected , Toast.LENGTH_SHORT).show(); spinner.setVisibility(View.GONE); } } Spinner code fore reference: itemsCity=getResources().getStringArray(R.array.cities_array); ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource( this, R.array.cities_array, android.R.layout.simple_spinner_item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); spinnerCity.setAdapter(adapter); And here is Button code: private class BtClickListner implements View.OnClickListener{ @Override public void onClick(View v) { essEditText.setVisibility(View.GONE); spinnerCity.setEnabled(false);// Getting exception here // Also tried spinnerCity.setVisibility(View.GONE);// Exception SameBt.setVisibility(View.GONE);// This is same button for which I am handliing event, but it allows me to change tis property at run time. }

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  • Pseudo random numbers in php

    - by pg
    I have a function that outputs items in a different order depending on a random number. for example 1/2 of the time Popeye's and its will be #1 on the list and Taco Bell and its logo will be #2 and half the time the it will be the other way around. The problem is that when a user reloads or comes back to the page, the order is re-randomized. $Range here is the number of items in the db, so it's using a random number between 1 and the $range. $random = mt_rand(1,$range); for ($i = 0 ; $i < count($variants); $i++) { $random -= $variants[$i]['weight']; if ($random <= 0) { $chosenoffers[$tag] = $variants[$i]; break; } } I went to the beginning of the session and set this: if (!isset($_SESSION['rannum'])){ $_SESSION['rannum']=rand(1,100); } With the idea that I could replace the mt_rand in the function with some sort of pseudo random generator that used the same 1-100 random number as a seed throughout the session. That way i won't have to rewrite all the code that was already written. Am I barking up the wrong tree or is this a good idea?

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  • Data Transfer Objects VS Domain/ActiveRecord Entities in the View in RoR

    - by leypascua
    I'm coming from a .NET background, where it is a practice to not bind domain/entity models directly to the view in not-so-basic CRUD-ish applications where the view does not directly project entity fields as-is. I'm wondering what's the practice in RoR, where the default persistence mechanism is ActiveRecord. I would assert that presentation-related info should not be leaked to the entities, not sure though if this is how real RoR heads would do it. If DTOs/model per view is the approach, how will you do it in Rails? Your thoughts? EDIT: Some examples: - A view shows a list of invoices, with the number of unique items in one column. - A list of credit card accounts, where possibly fraudulent transactions were executed. For that, the UI needs to show this row in red. For both scenarios, The lists don't show all of the fields of the entities, just a few to show in the list (like invoice #, transaction date, name of the account, the amount of the transaction) For the invoice example, The invoice entity doesn't have a field "No. of line items" mapped on it. The database has not been denormalized for perf reasons and it will be computed during query time using aggregate functions. For the credit card accounts example, surely the card transaction entity doesn't have a "Show-in-red" or "IsFraudulent" invariant. Yes it may be a business rule, but for this example, that is a presentation concern, so I would like to keep it out of my domain model.

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  • Improve speed of own debug visualizer for Delphi 2010

    - by netcodecz
    I wrote Delphi debug visualizer for TDataSet to display values of current row, source + screenshot: http://delphi.netcode.cz/text/tdataset-debug-visualizer.aspx . Working good, but very slow. I did some optimalization (how to get fieldnames) but still for only 20 fields takes 10 seconds to show - very bad. Main problem seems to be slow IOTAThread90.Evaluate used by main code shown below, this procedure cost most of time, line with ** about 80% time. FExpression is name of TDataset in code. procedure TDataSetViewerFrame.mFillData; var iCount: Integer; I: Integer; // sw: TStopwatch; s: string; begin // sw := TStopwatch.StartNew; iCount := StrToIntDef(Evaluate(FExpression+'.Fields.Count'), 0); for I := 0 to iCount - 1 do begin s:= s + Format('%s.Fields[%d].FieldName+'',''+', [FExpression, I]); // FFields.Add(Evaluate(Format('%s.Fields[%d].FieldName', [FExpression, I]))); FValues.Add(Evaluate(Format('%s.Fields[%d].Value', [FExpression, I]))); //** end; if s<> '' then Delete(s, length(s)-4, 5); s := Evaluate(s); s:= Copy(s, 2, Length(s) -2); FFields.CommaText := s; { sw.Stop; s := sw.Elapsed; Application.MessageBox(Pchar(s), '');} end; Now I have no idea how to improve performance.

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  • BITS client fails to specify HTTP Range header

    - by user256890
    Our system is designed to deploy to regions with unreliable and/or insufficient network connections. We build our own fault tolerating data replication services that uses BITS. Due to some security and maintenance requirements, we implemented our own ASP.NET file download service on the server side, instead of just letting IIS serving up the files. When BITS client makes an HTTP download request with the specified range of the file, our ASP.NET page pulls the demanded file segment into memory and serve that up as the HTTP response. That is the theory. ;) This theory fails in artificial lab scenarios but I would not let the system deploy in real life scenarios unless we can overcome that. Lab scenario: I have BITS client and the IIS on the same developer machine, so practically I have enormous network "bandwidth" and BITS is intelligent enough to detect that. As BITS client discovers the unlimited bandwidth, it gets more and more "greedy". At each HTTP request, BITS wants to grasp greater and greater file ranges (we are talking about downloading CD iso files, videos), demanding 20-40MB inside a single HTTP request, a size that I am not comfortable to pull into memory on the server side as one go. I can overcome that simply by giving less than demanded. It is OK. However, BITS gets really "confident" and "arrogant" demanding files WITHOUT specifying the download range, i.e., it wants the entire file in a single request, and this is where things go wrong. I do not know how to answer that response in the case of a 600MB file. If I just provide the starting 1MB range of the file, BITS client keeps sending HTTP requests for the same file without download range to continue, it hammers its point that it wants the entire file in one go. Since I am reluctant to provide the entire file, BITS gives up after several trials and reports error. Any thoughts?

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  • Get Mechanize to handle cookies from an arbitrary POST (to log into a website programmatically)

    - by Horace Loeb
    I want to log into https://www.t-mobile.com/ programmatically. My first idea was to use Mechanize to submit the login form: However, it turns out that this isn't even a real form. Instead, when you click "Log in" some javascript grabs the values of the fields, creates a new form dynamically, and submits it. "Log in" button HTML: <button onclick="handleLogin(); return false;" class="btnBlue" id="myTMobile-login"><span>Log in</span></button> The handleLogin() function: function handleLogin() { if (ValidateMsisdnPassword()) { // client-side form validation logic var a = document.createElement("FORM"); a.name = "form1"; a.method = "POST"; a.action = mytmoUrl; // defined elsewhere as https://my.t-mobile.com/Login/LoginController.aspx var c = document.createElement("INPUT"); c.type = "HIDDEN"; c.value = document.getElementById("myTMobile-phone").value; // the value of the phone number input field c.name = "txtMSISDN"; a.appendChild(c); var b = document.createElement("INPUT"); b.type = "HIDDEN"; b.value = document.getElementById("myTMobile-password").value; // the value of the password input field b.name = "txtPassword"; a.appendChild(b); document.body.appendChild(a); a.submit(); return true } else { return false } } I could simulate this form submission by POSTing the form data to https://my.t-mobile.com/Login/LoginController.aspx with Net::HTTP#post_form, but I don't know how to get the resultant cookie into Mechanize so I can continue to scrape the UI available when I'm logged in. Any ideas?

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  • Custom ConfigurationSection: CallbackValidator called with empty string

    - by Paolo Tedesco
    I am writing a custom configuration section, and I would like to validate a configuration property with a callback, like in this example: using System; using System.Configuration; class CustomSection : ConfigurationSection { [ConfigurationProperty("stringValue", IsRequired = false)] [CallbackValidator(Type = typeof(CustomSection), CallbackMethodName = "ValidateString")] public string StringValue { get { return (string)this["stringValue"]; } set { this["stringValue"] = value; } } public static void ValidateString(object value) { if (string.IsNullOrEmpty((string)value)) { throw new ArgumentException("string must not be empty."); } } } class Program { static void Main(string[] args) { CustomSection cfg = (CustomSection)ConfigurationManager.GetSection("customSection"); Console.WriteLine(cfg.StringValue); } } And my App.config file looks like this: <?xml version="1.0" encoding="utf-8" ?> <configuration> <configSections> <section name="customSection" type="CustomSection, config-section"/> </configSections> <customSection stringValue="lorem ipsum"/> </configuration> My problem is that when the ValidateString function is called, the value parameter is always an empty string, and therefore the validation fails. If i just remove the validator, the string value is correctly initialized to the value in the configuration file. What am I missing? EDIT I discovered that actually the validation function is being called twice: the first time with the default value of the property, which is an empty string if nothing is specified, the second time with the real value read from the configuration file. Is there a way to modify this behavior?

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  • PHP Frameworks: Codeigniter vs. Yii vs. Custom?

    - by Industrial
    Hi everybody, I have used codeigniter for a some years now. Why I chosed to work with codeigniter back then? Pretty much for the extensive documentation that were available and the big user community. It made me as a totally newbie to the MVC pattern able to get a site up and running really fast. I think what is priorited from my side is that the framework doesn't affect performance too much, which Codeigniter seems to be pretty good at (when compared to other frameworks out there) and Yii, an even better option. Since the time has gone from when I started out with codeigniter, the project sizes have also increased and thereby the demand of the framework and it's footprint on the code. I have thought a few times about writing a whole new MVC framework to do only the thing's I want it to do, but it feels like reinventing the wheel and I cannot yet justify it. I am not sure whether or not it's a good solution to build a site that have the potential to become really big on either Yii or Codeigniter. I have tried to find as much as possible documentation about this comparision/issue online before posting here, but have found very few real-life arguments and stories from people that have shifted between the two PHP frameworks or have been in the same situation as me. So - what's your thoughts about Codeigniter vs. Yii vs. going custom? References: http://daniel.carrera.bz/2009/01/comparison-of-php-frameworks-part-i/ http://www.beyondcoding.com/2009/03/02/choosing-a-php-framework-round-2-yii-vs-kohana-vs-codeigniter/

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  • Graph colouring algorithm: typical scheduling problem

    - by newba
    Hi, I'm training code problems like UvA and I have this one in which I have to, given a set of n exams and k students enrolled in the exams, find whether it is possible to schedule all exams in two time slots. Input Several test cases. Each one starts with a line containing 1 < n < 200 of different examinations to be scheduled. The 2nd line has the number of cases k in which there exist at least 1 student enrolled in 2 examinations. Then, k lines will follow, each containing 2 numbers that specify the pair of examinations for each case above. (An input with n = 0 will means end of the input and is not to be processed). Output: You have to decide whether the examination plan is possible or not for 2 time slots. Example: Input: 3 3 0 1 1 2 2 0 9 8 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 Ouput: NOT POSSIBLE. POSSIBLE. I think the general approach is graph colouring, but I'm really a newb and I may confess that I had some trouble understanding the problem. Anyway, I'm trying to do it and then submit it. Could someone please help me doing some code for this problem? I will have to handle and understand this algo now in order to use it later, over and over. I prefer C or C++, but if you want, Java is fine to me ;) Thanks in advance

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  • What java web framework best accomodates web ui designers?

    - by Brian Laframboise
    What Java web framework out there best supports a role of "web UI designer", that is, lets you: Use popular web design tools (xhtml validators, css editors, what have you) on your views/pages View changes without running on a server Rapidly prototype different UI options Supports a (somewhatly) clean separation between "developer" and "designer" (terminology intentionally vague) We, like many others, have found these capabilities sorely lacking in our large, legacy Struts 1.x apps that use lots of JSP fragments and includes. We've decided to port our apps to a JSR-168/268 portal environment, but we have not decided on what Java web framework will power the portlets. We're open to any kind (action-based, component-based, etc) and a key criterion is how well it supports the role described above. I'm intrigued by Tapestry which claims that its views are XHTML compliant pages (that simply have extra Tapestry-specific attributes added onto them to be processed at runtime). This sounds like it would play well with a web ui designer's toolkit. However, I'd like to know if this is what actually happens in the real world, or if compromises are necessary. Of course, if there's something much better than Tapestry, I'd love to hear about it!

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  • ASP.NET Chart Control errors in Event Viewer

    - by Richard Reddy
    Hi, I have been using the ASP.NET chart controls for a while on win2k3 (32bit) setups without any issue but have noticed that on our new win2k8 (64bit) box I am getting a warning message showing up in the event viewer from the chart control. In my web.config file I have the following tag telling the Chart Control where I can store the Temp Files: <add key="ChartImageHandler" value="storage=file;timeout=20;dir=c:\TempImageFiles\;" /> Below is the warning message produced by the control: Event code: 3005 Event message: An unhandled exception has occurred. Event time: 10/7/2009 2:40:03 PM Event time (UTC): 10/7/2009 2:40:03 PM Event ID: 237c3b208962429e8bbc5a48ffd177f0 Event sequence: 2860 Event occurrence: 26 Event detail code: 0 Application information: Application domain: /LM/W3SVC/2/ROOT-1-128993655360497729 Trust level: Full Application Virtual Path: / Application Path: C:\data\sites\mydomain.com\ Machine name: 231692-WEB Process information: Process ID: 4068 Process name: w3wp.exe Account name: NT AUTHORITY\NETWORK SERVICE Exception information: Exception type: ArgumentException Exception message: The image is not found. Request information: Request URL: http://www.mydomain.com/ChartImg.axd?i=chart%5F0%5F3.png&g=bccc8aa11abb470980c60e8cf1e71e15 Request path: /ChartImg.axd User host address: my domain ip User: Is authenticated: False Authentication Type: Thread account name: NT AUTHORITY\NETWORK SERVICE Thread information: Thread ID: 7 Thread account name: NT AUTHORITY\NETWORK SERVICE Is impersonating: False Stack trace: at System.Web.UI.DataVisualization.Charting.ChartHttpHandler.ProcessSavedChartImage(HttpContext context) at System.Web.UI.DataVisualization.Charting.ChartHttpHandler.System.Web.IHttpHandler.ProcessRequest(HttpContext context) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) It's worth pointing out that ALL of the chart images are displayed correctly on the screen so I'm not sure when/where the image not found error is being caused. Is this a 64bit issue? Thanks, Rich

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  • How to determine the (natural) language of a document?

    - by Robert Petermeier
    I have a set of documents in two languages: English and German. There is no usable meta information about these documents, a program can look at the content only. Based on that, the program has to decide which of the two languages the document is written in. Is there any "standard" algorithm for this problem that can be implemented in a few hours' time? Or alternatively, a free .NET library or toolkit that can do this? I know about LingPipe, but it is Java Not free for "semi-commercial" usage This problem seems to be surprisingly hard. I checked out the Google AJAX Language API (which I found by searching this site first), but it was ridiculously bad. For six web pages in German to which I pointed it only one guess was correct. The other guesses were Swedish, English, Danish and French... A simple approach I came up with is to use a list of stop words. My app already uses such a list for German documents in order to analyze them with Lucene.Net. If my app scans the documents for occurrences of stop words from either language the one with more occurrences would win. A very naive approach, to be sure, but it might be good enough. Unfortunately I don't have the time to become an expert at natural-language processing, although it is an intriguing topic.

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  • Blackberry: How to properly handle focus traversal in custom field?

    - by DaveJohnston
    I am writing an app for Blackberry and I have the following problem: I have implemented a custom field by extending the Manager class. The field is quite simple, it consists of a label and two check boxes, yes and no. The fields are laid out so that the label is on the left and uses as much space as it can while still allowing room for the check boxes which are positioned next to each other at the right and vertically centred compared to the label (if it spans more than one line). So it looks like this: This is a question? O Yes O No Everything is fine so far in terms of laying out the fields. But now I am trying to handle focus traversal. First of all the default behaviour when the user scrolls up or down is to move between the yes and no options. I want to move to the next field above or below when up or down is pressed, so I did this: protected int moveFocus(int amount, int status, int time) { if (status == 537001984 || status == -1610481664) { // Up or down was pressed // Don't move focus between yes and no when up or down is pressed. return amount; } return super.moveFocus(amount, status, time); } And that seems to work. The next thing I would like to do is to remember which option last had the focus when the field loses focus, then on gaining focus again (regardless of which direction the focus comes from) set this field to have the focus. I tried overriding onUnfocus and onFocus so that onUnfocus I note which field was focussed then onFocus setFocus to that field. But I get a StackOverflowError, I guess because the call to setFocus on a field within the manager actually calls onFocus for the manager itself again?? So does anyone know how I should be doing this? I checked the DateField and it has the exact behaviour I am looking for, i.e. it remembers if you were last on the day, month or year field and sets this field to focus when the field itself gets the focus.

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  • Alternative native api for Process.Start

    - by Akash Kava
    Ok this is not duplicate of "http://stackoverflow.com/questions/2065592/alternative-to-process-start" because my question is something different here. I need to run a process and wait till execution of process and get the output of console. There is way to set RedirectStandardOutput and RedirectStandardError to true, however this does not function well on some machines, (where .NET SDK is not installed), only .NET runtime is installed, now it works on some machines and doesnt work on some machines so we dont know where is the problem. I have following code, ProcessStartInfo info = new ProcessStartInfo("myapp.exe", cmd); info.CreateNoWindow = true; info.UseShellExecute = false; info.RedirectStandardError = true; info.RedirectStandardOutput = true; Process p = Process.Start(info); p.WaitForExit(); Trace.WriteLine(p.StandardOutput.ReadToEnd()); Trace.WriteLine(p.StandardError.ReadToEnd()); On some machines, this will hang forever on p.WaitForExit(), and one some machine it works correctly, the behaviour is so random and there is no clue. Now if I can get a real good workaround for this using pinvoke, I will be very happy.

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  • Blackberry MDS simulator - Can't connect to the internet in the simulator.

    - by bcoyour
    I'm trying to do some testing of a website through the Blackberry simulator, while the simulator works fine, I can't get to any sites in the Blackberry Browser. Here is the specific setup I'm using. I'm Windows 7 (64-bit) Home Edition I have the latest (at the time) MDS installation - BlackBerry Email and MDS Services Simulators 4.1.4 Finally, I have the latest (at the time) Blackberry Simulator - BlackBerry Smartphone Simulators 5.0.0 (5.0.0.442) - 9700 I first start the MDS service, it briefly pops up the command-prompt and then closes it. I'm assuming that when it does that, it started the MDS service. Then I open the Blackberry simulator (9700), which opens up fine and loads the Blackberry OS. Then with the Blackberry OS all loaded up, I navigate to the browser and for example type www.google.com and then at the bottom it just says "sending request" and loads for about a minute. Then times out and says it can't find a connection. Anyone have any thoughts on what I'm missing? Or, does anyone know of an online simulator for the Blackberry, because thus far this has been a huge pain for testing sites on a Blackberry. Thank you! Ben

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