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• Algorithm for sentence analysis and tokenization

  - by Andrea Nagar

  I need to analyze a document and compile statistics as to how many times each a sequence of words is used (so the analysis is not on single words but of batch of recurring words). I read that compression algorithms do something similar to what I want - creating dictionaries of blocks of text with a piece of information reporting its frequency. It should be something similar to http://www.codeproject.com/KB/recipes/Patterns.aspx Do you have anything written in C#?

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• a class function with if(this==NULL) test got compiled?

  - by James

  I saw this code snippet during our lab and it actually compiles in MSVC2008 and G++. void LinkList< class T ::Insert(T n) { if (this == NULL) // some code here } As far as I know the this must not be null since you cannot call a class functions in c++ if it wasn't instantiated. Is this a valid code? if so what's the reason behind and where it can be useful?

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• Where does Subversion physically stores its DataBase ?

  - by Mika Jacobi

  After reading many introductions, starting guides, and documentation on SVN, I still cannot figure out where is my versioning data stored. I mean physically. I have over 3 GB of code checked in, and the repo is just a few MB large. This is still Voodoo for me. And, as a coder, I don't really believe in Magic. EDIT : A contributor stated that not all the code was stored in the repo, is that true ? I mean, if I delete my local working copy I still can get back my source code for the repository... If so, I still can't understand how such a compression can occur on my code...

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• Looking for interesing formula

  - by Thinker

  I'm creating a game, where players can make an alloy. To make it less predictable, and more interesting, I thought that durability and hardness of an alloy can't be calculated by simple formula, because it will be extremely easy to find extrema, where alloy have best statistics. So the questions is, is there any formula for a function, where extrema can be found only by investigating all points? Input values will be in percents: 0.0%-100.0%. I think, it should look like this: half sound wave

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• Working smaple mpoauthconnection for iphone

  - by Ameya

  Has any one got a working code sample for mpoauthconnection. I had checkout source from code.google.com/p/mpoauthconnectio. But selecting MPAouthTestApp gives the following error. target specifies product type 'com.apple.product-type.framework', but there's no such product type for the 'iphonesimulator' platform Please help me to solve the error or can anyone provide me with a sample working code for mpoauthconnection. My email id is [email protected]

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• What is machine learning ?

  - by Kushal Waikar

  What is machine learning ? What does machine learning code do ? When we say that the machine learns, does it modify the code of itself or it modifies history (database) which will contain the experience of code for given set of inputs?

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• How do Ruby and Python implement their interactive consoles?

  - by sxa

  When implementing the interpreter for my programming language I first thought of a simple console window which allows the user to enter some code which is then executed as a standalone program as a shell. But there are severe problems: If every line of code the user enters is handled as a standalone program, it has to go through the tokenizer and parser and is then just executed by the interpreter - what about functions then? How can the Python/Ruby interactive consoles (IDLE, irb) "share" the code? How is the code entered handled? Example: >> def x: >> print("Blah") >> >> x() Where is the function stored so it can be called at any time again? How can the interactive console take everything entered as obviously one program without executing everything over and over again?

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• Eclipse: How debug without source jar?

  - by BestPractices

  I am using Eclipse 3.4. I want to be able to put a breakpoint in a line of code that's in a jar for which I dont have the source code and no source code is available. How can I do this?

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• Problem with impersonating a specific user in WCF service

  - by aJ

  I am having a WCF service hosted in IIS on WindowsServer 2008. This service needs to write to a shared folder present on another machine(Windows XP). The shared folder has write permissions for a particular user say "X" which is present on both the machines .i.e on the server where the service is running as well as the machine where the shared folder is present. The service runs under the NETWORK SERVICE account. For the service to access the shared folder I have added code to impersonate the user "X"in the service so that it gets the permission to write to the shared folder. Since I want to impersonate user "X" only when I run a particular section of code I have used the sample code. Even after the impersonation the service fails to write to the shared folder sometimes. It works sporadically. Whereas if I add tag in the Web.config file it works perfectly fine. <identity impersonate="true" userName="accountname" password="password" /> But the above is not desirable since it impersonates a specific user for all the requests. What I need is to impersonate a specific user only when I run a particular section of code. Also, the impersonation code works absolutely fine when the shared folder is present on another WindowsServer 2008. Could anyone give me ideas on what's going wrong here.

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• Static Block in Java

  - by Mohit Deshpande

  I was looking over some code the other day and I came across: static { ... } Coming from C++, I had no idea why that was there. Its not an error because the code compiled fine. What is this "static" block of code?

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• Mixing two wav music files of different size

  - by iphoneDev

  Hi, I want to mix audio files of different size into a one single .wav file. There is a sample through which we can mix files of same size [(http://www.modejong.com/iOS/#ex4 )(Example 4)]. I modified the code to get the mixed file as a .wav file. But I am not able to understand that how to modify this code for unequal sized files. If someone can help me out with some code snippet,i'll be really thankful.

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• MVVM - what is the ideal way for usercontrols to talk to each other

  - by Sandbox

  I have a a user control which contains sevral other user controls. I am using MVVM. Each user control has a corresponding VM. How do these user controls send information to each other. I want to avoid writing any code in the xaml code behind. Particularly I am interested in how the controls (inside the main user control) will talk to each other and how will they talk to the container user control. EDIT: I know that using events-delegates will help me solve this issue. But, I want to avoid writing any code in xaml code-behind.

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• Asp.net Mvc - Kigg: Maintain User object in HttpContext.Items between requests.

  - by Pickels

  Hallo, first I want to say that I hope this doesn't look like I am lazy but I have some trouble understanding a piece of code from the following project. http://kigg.codeplex.com/ I was going through the source code and I noticed something that would be usefull for my own little project I am making. In their BaseController they have the following code: private static readonly Type CurrentUserKey = typeof(IUser); public IUser CurrentUser { get { if (!string.IsNullOrEmpty(CurrentUserName)) { IUser user = HttpContext.Items[CurrentUserKey] as IUser; if (user == null) { user = AccountRepository.FindByClaim(CurrentUserName); if (user != null) { HttpContext.Items[CurrentUserKey] = user; } } return user; } return null; } } This isn't an exact copy of the code I adjusted it a little to my needs. This part of the code I still understand. They store their IUser in HttpContext.Items. I guess they do it so that they don't have to call the database eachtime they need the User object. The part that I don't understand is how they maintain this object in between requests. If I understand correctly the HttpContext.Items is a per request cache storage. So after some more digging I found the following code. internal static IDictionary<UnityPerWebRequestLifetimeManager, object> GetInstances(HttpContextBase httpContext) { IDictionary<UnityPerWebRequestLifetimeManager, object> instances; if (httpContext.Items.Contains(Key)) { instances = (IDictionary<UnityPerWebRequestLifetimeManager, object>) httpContext.Items[Key]; } else { lock (httpContext.Items) { if (httpContext.Items.Contains(Key)) { instances = (IDictionary<UnityPerWebRequestLifetimeManager, object>) httpContext.Items[Key]; } else { instances = new Dictionary<UnityPerWebRequestLifetimeManager, object>(); httpContext.Items.Add(Key, instances); } } } return instances; } This is the part where some magic happens that I don't understand. I think they use Unity to do some dependency injection on each request? In my project I am using Ninject and I am wondering how I can get the same result. I guess InRequestScope in Ninject is the same as UnityPerWebRequestLifetimeManager? I am also wondering which class/method they are binding to which interface? Since the HttpContext.Items get destroyed each request how do they prevent losing their user object? Anyway it's kinda a long question so I am gradefull for any push in the right direction. Kind regards, Pickels

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• Any open source hosting site for abandoned projects?

  - by ssg

  I have some projects which I have ceased their development a long time ago but still get code access requests for. I'm currently providing zipped packages from my personal web site. I think zipped packages are far from being useful (e.g. can't read code right away, can't provide url's to individual source files, can't fork easily, lifetime is dependent on my own web page's). I want that archaic code to be present on the net regardless I keep my web page up or not. I saw the question "What's the best open source hosting site?". However, most sites request the project "to be active", Codeplex for instance. I didn't go through EULA's of all providers to see if they allow abandoned projects. Are there elephant's graveyards for old code without activity restrictions? Which one would you pick, why?

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• creating arrays in for loops.... without creating an endless loop that ruins my day!

  - by Peter

  Hey Guys, Im starting with a csv varible of column names. This is then exploded into an array, then counted and tossed into a for loop that is supposed to create another array. Every time I run it, it goes into this endless loop that just hammers away at my browser...until it dies. :( Here is the code.. $columns = 'id, name, phone, blood_type'; <code> $column_array = explode(',',$columns); $column_length = count($column_array); //loop through the column length, create post vars and set default for($i = 0; $i <= $column_length; $i++) { //create the array iSortCol_1 => $column_array[1]... $array[] = 'iSortCol_'.$i = $column_array[0]; } </code> What I would like to get out of all this is a new array that looks like so.. <code> $goal = array( "iSortCol_1" => "id", "iSortCol_2" => "name", "iSortCol_3" => "phone", "iSortCol_4" => "blood_type" ); </code>

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• Which software license is "I made this, you can do anything you want with it"

  - by JavaRocky

  I am helping someone with some software they are selling. I am contributing code for free. The code that I wrote uses open source licenses and i have included them with the source code. Which software license can i put my code under? I would like to totally give the software to them for free. Please ask questions if there are issues O_o. Update: The library which is included is under Apache License, Version 2.0. Sorry for not including before.

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• Treat a void function as a value

  - by Brendan Long

  I'm writing some terrible, terrible code, and I need a way to put a free() in the middle of a statement. The actual code is: int main(){ return printf("%s", isPalindrome(fgets(malloc(1000), 1000, stdin))?"Yes!\n":"No!\n") >= 0; // leak 1000 bytes of memory } I was using alloca(), but I can't be sure that will actually work on my target computer. My problem is that free returns void, so my code has this error message: error: void value not ignored as it ought to be The obvious idea I had was: int myfree(char *p){ free(p); return 0; } Which is nice in that it makes the code even more unreadable, but I'd prefer not to add another function. I also briefly tried treating free() as a function pointer, but I don't know if that would work, and I don't know enough about C to do it properly. Note: I know this is a terrible idea. Don't try this at home kids.

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• Is it possible, with simple F# pattern matching transformations, to ignore unmatched values without

  - by Phobis

  So, I previously asked this question: http://stackoverflow.com/questions/2820234/can-someone-help-me-compare-using-f-over-c-in-this-specific-example-ip-address I was looking at the posted code and I was wondering if this code could be written without it producing a warning: let [|a;b;c;d|] = s.Split [|'.'|] IP(parseOrParts a, parseOrParts b, parseOrParts c, parseOrParts d) Is it possible to do something for the match _ pattern ot ignore? Without adding in something like Active Patterns? i want to keep the code as simple as possible... can I do this without drastically changing this code? NOTE: Warning is as follows Warning Incomplete pattern matches on this expression. For example, the value '[|_; _; _; _; _|]' may indicate a case not covered by the pattern(s).

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• sql "Group By" and "Having"

  - by Hans Rudel

  im trying to work through some questions and im not sure how to do the following Q:Find the hard drive sizes that are equal among two or more PCs. its q15 on this site http://www.sql-ex.ru/learn_exercises.php#answer_ref The database scheme consists of four tables: Product(maker, model, type) PC(code, model, speed, ram, hd, cd, price) Laptop(code, model, speed, ram, hd, screen, price) Printer(code, model, color, type, price) any pointers would be appreciated.

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• Ms Access. How to compact a database within teh database using vba

  - by tksy

  HI, I am running a few modules of vba code, when in the middle the code crashes as access reaches its max size of 2gb. But if i compress the database at that point it is only 200 mb so is it possible to compress the database at regular intervals while the code is running . thanks tksy

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• Eclipse adding your own build command

  - by user319873

  I am new to eclipse and wanted to do the following;- 1) how to use my custom build commands with eclipse. Till now I only saw make all?I use a shell script for building my project, how can I use that in eclipse environment. 2) When I create a new project with the existing source code, it doesn't add the files, without building the code and if code fails to build (because I generally don't have make all). How to resolve this issue

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• Getting max. screen resolution with Group By

  - by Quandary

  Question: I have a website where I gather browser statistics. I have an SQL table (T_Visits), with the following columns: uniqueidentifier Visit_UID, uniqueidentifier User_UID, datetime Visit_DateTime, float Screen_w, float Screen_h, float Resolution = Screen_w * Screen_h varchar resolutionstring = screen_w + ' x ' + screen_h Now I want to get the maximum/minimum resolution each user had: Select User_UID, max(resolution) from T_Visits GROUP BY User_UID How can I get the corresponding resolution string ? I mean I can get the max(screen_w) and max(screen_h), but there's no guarantee that the corresponding resolutionstring would be max(screen_w) +' x '+ max(screen_h)

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• Checkbox issue with IE6

  - by kumar

  This is my new post regardence of prevoious post with update html code.. http://stackoverflow.com/questions/2994538/jquery-chebox-selection-not-working-in-ie-this-is-working-in-firefox This is my selectall button code..on clicking this i am selecting all checkboxes.. This code working in Firefox not in IE can anybody help me out why its doing like this? thanks

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• Strange behavior with ajax call complete in JavaScript modules

  - by user2598794

  I have 3 simple modules with JavaScript code and JQuery ajax call. First module lots.js: var Lots = (function ($) { var self = this; var processIsRunning; return { getLots: function (lotsUrl) { var items = []; self.processIsRunning = true; var request = $.ajax({ url: lotsUrl, type: 'POST', success: function (data) { //some code } }); $.when(request).done(function() { //some code self.processIsRunning = false; }); }, isComplete: function () { return !self.processIsRunning; } }; }(jQuery)); Module bids.js: var Bids = (function ($) { return { makeBids: function (bidUrl) { //some code } }; }(jQuery)); Module app.js which bundles all together: var App = (function () { var lots_url = null; var bid_url = null; var self = this; return { if (!self.lots_url) { self.lots_url = lotsUrl; } GetLots: function (lotsUrl) { Lots.getLots(self.lots_url); }, MakeBids: function makeBid(bidUrl) { //some code var isComp = Lots.isComplete(); while (!isComp) { isComp = Lots.isComplete(); } Bids.makeBids(self.bid_url); } }; }()); But in the 'while' loop I always get 'isComplete=false'. In debug I see that 'processIsRunning' in Lots module is always true. What's the problem?

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• Need help for this syntax: "#define LEDs (char *) 0x0003010"

  - by Noge

  I'm doing programming of a softcore processor, Nios II from Altera, below is the code in one of the tutorial, I manage to get the code working by testing it on the hardware (DE2 board), however, I could not understand the code. #define Switches (volatile char *) 0x0003000 #define LEDs (char *) 0x0003010 void main() { while (1) *LEDs = *Switches; } What I know about #define is that, it is either used to define a constant, or a macro, but why in the above code, there are casting like, (char *) 0x0003010, in #define? why the 2 constants, Switches and LEDs act like a variable instead of a constant? Thanks in advance !

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