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• The difference between lists and sequences

  - by Peanut

  I'm trying to understand the difference between sequences and lists. In F# there is a clear distinction between the two. However in C# I have seen programmers refer to IEnumerable collections as a sequence. Is what makes IEnumerable a sequence the fact that it returns an object to iterate through the collection? Perhaps the real distinction is purely found in functional languages?

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• Usage of Maven (and open source in general) in high governance and risk-averse large organizations (

  - by bart

  Does anyone have any good stories of these kinds of organizations being open to using open source (such as tools like Maven etc). Many staff I've encountered have little or no exposure to open source/systems and open source is treated with great suspicion. Some reasons given for this are lack of support and robustness, which is ironic given the number of end-of-life unsupported vendor products that are in production. Bonus points for any success stories where you've seen open source go into orgs like this and have a real benefit!

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• I want to scramble an array in PHP

  - by BRUL

  I want PHP to randomly create a multi-dimensional array by picking a vast amount of items out of predefined lists for n times, but never with 2 times the same. Let me put that to human words in a real-life example: i want to write a list of vegetables and meat and i want php to make a menu for me, with every day something else then yesterday. I tried and all i got was the scrambling but there were always doubles :s

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• Scala: custom control structures with several code blocks

  - by Vilius Normantas

  Is it possible to create a custom control structure with several code blocks, in the fashion of before { block1 } then { block2 } finally { block3 }? The question is about the sugar part only - I know the functionality can be easily achieved by passing the three blocks to a method, like doInSequence(block1, block2, block3). A real life example. For my testing utilities I'd like to create a structure like this: getTime(1000) { // Stuff I want to repeat 1000 times. } after { (n, t) => println("Average time: " + t / n) }

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• Robust Javascript parser in Java

  - by Misha Koshelev

  Dear All: I am looking for a robust Javascript parser written in Java - by which I mean a Javascript parser that is able to handle most real world Javascript. I am only interested in parsing Javascript, not in executing it. I have found Rhino: http://groups.google.com/group/mozilla.dev.tech.js-engine.rhino/browse_thread/thread/1eff23a8ee57b991 Am I missing anything? Is this the best solution? Thank you! Misha

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• Reading from an USB barcode scanner

  - by roman

  Hi, I've got this nice USB barcode scanner and I'd like to readthe input using the USB driver and not the keyboard input. How can this be accomplished using .NET? any ready libraries? I couldn't find anything of real use... Thanks!

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• How to share memory buffer across sessions in Django?

  - by afriza

  I want to have one party (or more) sends a stream of data via HTTP request(s). Other parties will be able to receive the same stream of data in almost real-time. The data stream should be accessible across sessions (according to access control list). How can I do this in Django? If possible I would like to avoid database access and use in memory buffer (along with some synchronization mechanism)

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• O(log n) algorithm to find the element having rank i in union of pre-sorted lists

  - by Eternal Learner

  Given two sorted lists, each containing n real numbers, is there a O(log?n) time algorithm to compute the element of rank i (where i coresponds to index in increasing order) in the union of the two lists, assuming the elements of the two lists are distinct? I can think of using a Merge procedure to merge the 2 lists and then find the A[i] element in constant time. But the Merge would take O(n) time. How do we solve it in O(log n) time?

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• How can the audio data being sent to the speakers be captured from an application?

  - by witch

  Is there an API that is suitable for doing this? A possible application of this is for writing a visualiser, and to play with real time signal processing. EDIT: The operating system in question is Windows. On Linux, a roundabout way to accomplish this is with Jack, but I'm hoping for a way to read the data in the audio buffer without having to couple apps to Jack.

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• Magento 1.3 or 1.4

  - by Oliver Bayes-Shelton

  Hi, I am having some real issues with Magento version 1.4, I get alot of "There has been an error processing your request." errors do you think going to the latest version of 1.3 would be more stable ?

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• What are the differences and similarities between the .NET languages?

  - by froadie

  I'm trying to figure out how much overlap there is between the different languages of the .NET framework, and what the real differences are. Is there an overlap of libraries/methods/functions...? If I'm googling a question for, say, VB .NET, and C# answers come up, what can I take from the C#-relevant info and what differences/incompatibilities should I look out for?

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• How often do you create implicit conversions for your classes?

  - by Vitali Climenco

  Hey there, I've been developing .NET applications for 4 years. So far, I did not need to create any implicit conversions for the classes I authored. Could you provide real-life situations when you could not do without creating implicit conversions? Thank you

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• Best web application language for Delphi Developers

  - by DelphiDev

  I'm Delphi developer, and I would like to build few web applications, I know about Intraweb, but I think it's not a real tool for web development, maybe for just intranet applications so I'm considering PHP, Python or ruby, I prefer python because it's better syntax than other( I feel it closer to Delphi), also I want to deploy the application to shared hosting, specially Linux. so as Delphi developer, what do you choose to develop web application?

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• TDD/BDD screencast/video resources

  - by Ree

  I've recently finished watching the Autumn of Agile screencasts and I'm looking for more material of similar scope. Basically, I'm looking for screencasts that present TDD/BDD process while developing somewhat "real life" applications (or parts of them) - so no 20 minute intros please. I'm surprised not to find anything like that though. If you know of any resources that fit the requirement, please list them.

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• Oracle Schema designer

  - by mehmetserif

  I don't know the real name of that application but what i want to do is so simple, i have an oracle database with more than 50 tables. I want to get their names also their field names, so i thought that it would be nice to use a designer or something like mssql has. Then i can get the field names and table names easily. How can i do that? Thanks for the help, Mehmet Serif Tozlu

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• Ruby on Rails testing: How can I test or at the very least see a form_for's error_messages_for?

  - by williamjones

  I'm working on creating a tests, and I can't figure out why the creation of a model from a form_for is failing in the test but works in real browsers. Is there a straightforward way for me to see what the problems are in the model creation? Even better would be, is there a straightforward way for me to test the error outputs that I access via error_messages_for? In that case, I'd like to also add in tests that make sure that malformed forms are outputting the correct errors.

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• An achievement system like here on stackoverflow in php?

  - by meds

  Conceptually speaking how would one go about writing an achievement system for a website using PHP and MySQL? Is the only real way of doing it is to constantly do MySQL queries to test for achievements and such?

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• Does Serena Dimensions have support for Maven Plugins or Ant Tasks?

  - by Zombies

  There is a lot of contradicting statements regarding whether ANT or Maven support Dimensions (NOT PVCS). Does anyone with real hands on experience know if there exists a reliable, production grade/ready plugin or task for Dimensions?

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• How to Fake a AsyncToken return in ActionScript 3

  - by Brett

  Using Parsley, I have a service that I access through a [Command(selector='list')] public function getRssFeed( msg:RssEvent ):AsyncToken { return service.list() as AsyncToken; } when I point to the "Real" RssService, everything works as expected. My problem is when I point to the "Mock" RssService. I can't figure out how to fake a AsyncToken with some dummy data return... does anyone knows how to do this ?

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• Intermittent error thrown, "A required anti-forgery token was not supplied or was invalid."

  - by Dave K

  I'm occasionally getting this error during normal use, and I've not found a way to stop it without removing the attribute that requires the token, which I'd rather not do. I've gotten this bug during my own testing (but seemingly randomly) and I know from my logging that actual logged-in users are getting it as well. Does anyone know what would cause the antiforgerytoken system to break (other than a real attack), and how I could fix this without opening up a security hole in my forms? Thanks!

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• jQuery plugin to put a twitter feed on my site

  - by Horace Loeb

  I want to put the first n entries from my twitter feed on my blog with the usual enhancements: Convert URLs to real links Remove @ replies I realize this wouldn't be too difficult to code from scratch with $.getJSON, but since this sort of thing is so common, I was wondering if there was a neat plugin that would handle everything for me.

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• Generating exactly prime number with Java

  - by Viet

  Hi, I'm aware of the function BigInteger.probablePrime(int bitLength, Random rnd) that outputs probably prime number of any bit length. I want a REAL prime number in Java. Is there any FOSS library to do so with acceptable performance? Thanks in advance!

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• Resources how to architect a iPhone application?

  - by Frank Martin

  What resources can you recommend for learning how to architect a iPhone application? Background of the question is that most of the resources explain the usage of a single class or concept (and i appreciate that a lot to learn something about the specific topic) but as far as i can see they lack unfortunately to describe how to put things together for typical real world applications.

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• Modifying .rdata unicode strings from windows PE files

  - by sdaa

  I have been looking for a way of modifying static strings stored in Windows .exe files in the .rdata section, however I haven't found a real way to do so yet. The whole thing is too complicated to do by hand (in this case by a HEX editor) and so I wanted to know if you have a solution to do so.

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• Ruby gem to obscure data

  - by Jake

  Anyone know of a gem that will allow you to obscure/sanitize data? Usecase: Download a production database, run some sanitation so that real customers won't get emails, cards charged etc.

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