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• Would server traffic software (something like Piwik or Google) make a good case for using No SQL?

  - by Scott Faisal

  We are trying to develop a company specific tracking software but not interested in Google or Piwik. Essentially we would have a JavaScript tracking code also. The data that it would capture, would that be best suited for traditional RDMS or can we get a NO SQL solution ? Any thoughts or ideas welcome.

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• How to manage user authentication/sessions?

  - by Dan

  What is the best way to manage user authentication/sessions in a web app, ideally in a clustered environment, using Spring Framework/MVC? I thought of creating a login bean that creates a jsession for authenticated users and then using AOP to check for the jsession before each controller method inovcation. If there isn't a better way, what are some possible alternatives? Thanks.

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• An O(1) Sort ~~~

  - by FlySwat

  Before you stone me for being a heretic, There is a sort that proclaims to be O(1), called "Bead Sort" (http://en.wikipedia.org/wiki/Bead_sort) , however that is pure theory, when actually applied I found that it was actually O(N * M), which is pretty pathetic. That said, Lets list out some of the fastest sorts, and their best case and worst case speed in Big O notation. ~~ FlySwat ~~

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• Encrypt and Decrypt information in a cookie.

  - by xRobot

  I need to securely crypt and decrypt information about users ( name, surname and user_id ) in cookies. What is the best way to do this ? What encryption and decryption function do I need ? Thanks ^_^

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• How can I background the R process in ESS / Emacs?

  - by Conor

  I often run long R scripts when I start my R environment. I would like to be able to load / run the R script in Emacs / ESS and continue other work in another buffer. When I press C-g or C-c C-c the process is interrupted, and I must restart the script. What is the best way to background the R process in ESS / Emacs?

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• How to subtract dates in YYYYMMDD format?

  - by NinjaBomb

  I have 2 integer fields that represent dates in the YYYYMMDD format. What is the best way to subtract 2 of these fields to get the correct # of days between them? For instance, if I take the difference between 20100511 and 20100428 I would like the result to be 13 and not 83. I know I need to convert the integer fields into date formats but everything I have tried either throws an exception or doesn't work correctly. What am I missing? Answers in vb.net please

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• WCF: intercept message send/receive progress in client

  - by Cullen Tsering

  Hello gurus, I have a desktop application sending/receiving messages (not files) to/from a WCF service. How do I intercept the total size of the message to be transferred and receive feedback (number of bytes transferred) during the transmission so a progress bar maybe displayed to the desktop app user? How many approaches are there? What is the best one given my application scenario? Any comments or suggestions will be greatly appreciated, Cullen

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• MP3 codec for WAV files

  - by Don Reba

  Wav files support different encodings, including mp3. Is there a C/C++ library that would produce mp3-encoded wav files from uncompressed wav? If not, what would be the best place to start to implement one?

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• How to run my script x times a day? (ruby on linux)

  - by Radek

  I want to run my ruby script x times a day (the number might change) on my linux box. What would be the best way to do so if I do not want it to happen at the same time? I want the time (hour and minute) to be random

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• Unit Testing something that returns nothing, how to assert?

  - by Bas

  How would you assert code like this? What would be the best approach to do so? if (myProperty == 0) return;

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• get data from online once and then viewable offline

  - by user313100

  Okay, I want to have an app that takes phone numbers from an online database and displays them in a table view. When the user is not online, I want them to still be able to see the numbers they already got from the database in the table view. If the user manages to go back online, the database updates the view. My question is, is this possible to do and if so, what's the best way to approach it? (bit of a newbie, please help me out)

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• Matlab regex if statement

  - by Dan

  I want to have matlab take user input but accept both cases of a letter. For example I have: function nothing = checkGC(gcfile) if exist(gcfile) reply = input('file exists, would you like to overwrite? [Y/N]: ', 's'); if (reply == [Yy]) display('You have chosen to overwrite!') else $ Do nothing end end The if statement obviously doesn't work, but basically I want to accept a lowercase or uppcase Y. Whats the best way to do this?

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• Ways to Actively Update Java from MySQL

  - by 8EM

  What is the best way to update a Java or GWT program from MySQL. For example, a MySQL database which holds Weather information... updating whenever the weather changes a degree. How would I update a Java / GWT field with each update. Would I use a thread to query every few seconds??

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• Is Maven a tool I want to use if I'm building a non-web app?

  - by TheDelChop

  Guys, I've got to build a GUI to be run on Desktops in Java. I'm decently new to Java, and I"m trying to understand what Maven is best suited for. Is this the type of application that would be well suited for Maven? Could someone just give me a 100 word explanation of what Maven basically is? Thanks, Joe

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• updating uitableview from the custom cell after changing it

  - by Nava Carmon

  Hi, I've implemented edit menu from my custom UITableViewCell class. I have a small problem of updating a table view from inside the custom table cell class. What is the best approach to do that? TIA

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• Floating point numbers in XML

  - by Jamie

  what is the best way to handle floating point numbers in XML? If I have, for instance: double a = 123.456; and I would like to keep it as <A> 123.456 </A> simply using ... myDoc.createTextNode(a.ToString()); is fine? Or should it be done with some Globalization stuff to make it region-independent?

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• What is a typical algorithm for finding a string within a string?

  - by Courtney85

  I recently had an interview question that went something like this: Given a large string (haystack), find a substring (needle)? I was a little stumped to come up with a decent solution. What is the best way to approach this that doesn't have a poor time complexity?

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• which service response is good for iphone development?

  - by suchita

  I have to create a web service for iPhone. So I would like to know which web response is the best for iPhone(SOAP vs REST vs XML vs JSON vs ... any other).

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• how to detect if openGL/card supports non power of 2?

  - by Nick

  What is the best way to detect if a graphics card and compiled openGL binary supports textures which are not a power of 2 at run time?

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• Check if string is just white space?

  - by John Isaacks

  I do not want to change a string nor do I want to check if it contains white space. I want to check if the entire string is ONLY white space. What the best way to do that?

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• What is a simple way to create a text field (or such) that only allows the user to enter ints/double

  - by badpanda

  I am looking for a way to ensure that my text field (JTextField, JFormattedTextField) is returning a double or int rather than a string when I call .getText(). What is the best way to do this (if possible)? Thanks! badPanda :D

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• Approaches for Content-based Item Recommendations

  - by PartlyCloudy

  Hello, I'm currently developing an application where I want to group similar items. Items (like videos) can be created by users and also their attributes can be altered or extended later (like new tags). Instead of relying on users' preferences as most collaborative filtering mechanisms do, I want to compare item similarity based on the items' attributes (like similar length, similar colors, similar set of tags, etc.). The computation is necessary for two main purposes: Suggesting x similar items for a given item and for clustering into groups of similar items. My application so far is follows an asynchronous design and I want to decouple this clustering component as far as possible. The creation of new items or the addition of new attributes for an existing item will be advertised by publishing events the component can then consume. Computations can be provided best-effort and "snapshotted", which means that I'm okay with the best result possible at a given point in time, although result quality will eventually increase. So I am now searching for appropriate algorithms to compute both similar items and clusters. At important constraint is scalability. Initially the application has to handle a few thousand items, but later million items might be possible as well. Of course, computations will then be executed on additional nodes, but the algorithm itself should scale. It would also be nice if the algorithm supports some kind of incremental mode on partial changes of the data. My initial thought of comparing each item with each other and storing the numerical similarity sounds a little bit crude. Also, it requires n*(n-1)/2 entries for storing all similarities and any change or new item will eventually cause n similarity computations. Thanks in advance! UPDATE tl;dr To clarify what I want, here is my targeted scenario: User generate entries (think of documents) User edit entry meta data (think of tags) And here is what my system should provide: List of similar entries to a given item as recommendation Clusters of similar entries Both calculations should be based on: The meta data/attributes of entries (i.e. usage of similar tags) Thus, the distance of two entries using appropriate metrics NOT based on user votings, preferences or actions (unlike collaborative filtering). Although users may create entries and change attributes, the computation should only take into account the items and their attributes, and not the users associated with (just like a system where only items and no users exist). Ideally, the algorithm should support: permanent changes of attributes of an entry incrementally compute similar entries/clusters on changes scale something better than a simple distance table, if possible (because of the O(n²) space complexity)

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• Is is possible to dynamically load a user control at runtime based on a condition within an UpdatePa

  - by Rob Packwood

  I need to conditionally load a few nested user controls on a webpage based on a dropdown selection that fires a callback. Is this possible? Are there any best practices for such an approach?

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• Language to choose for developing website.

  - by Ravi

  What is the best language for developing a website. I know its kind of an odd question. I recently saw a lot of articles for developing a website and they all chose PHP. I mostly work in Java technologies, so was wondering is Java limited to web application and not for websites.

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• Pointers for monitoring drupal 6 site needed, difference in server aw stats and the core "statistics

  - by Saurabh

  The IP addresses logged in by the Drupal 6 core "Statistics" module are not being displayed by the AW statistics displayed by my hosting server (hostgator). I am not able to comprehend why and which statistics are more reliable ? Also I would request some light to be shed on the best practices to monitor a Drupal 6 website. Thanks for your help people.

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