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• When knowledge of "multithreading" is specified in a C++ job description, what is the expectation?

  - by Vaibhav Khattri

  I understand it should cover threading primitives (mutex, semaphore, condition variables etc.) plus design patterns (such as those specified in POSA2). But what's more? Every project has its own multithreading scenarios and one may have not dealt with those that the job is expecting?. So how does one build their knowledge and prove that they have the ability?

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• Does the Dalvik file format (*.dx) support more instructions than a Java .class file?

  - by soc

  Is there anything the Dalvik VM supports (in terms of bytecode) which is not used currently because the .class files don't have it? As an example, if people would write their own Source-to-DX converter for their functional language XYZ, would they be able to implement e. g. full tail calls although the .class file does support tail calls only under certain circumstances?

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• how to store assembly in memory

  - by da cheng

  Hi, I have a question about how to store the assembly language in memory,when I compile the C-code in assembly, and run by "step", I can see the address of each instruction, but is there a way to change the start address of the code in the memory? Second question is, can I break the assembly code into two? I am curious about how the machine store the assembly code. BTW, I am working on a MACBOOK Pro, duo core. Thank you. -da

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• FormsAuthentication AuthCookie data type

  - by FreshCode

  Does the original data type of the username string in a call to FormsAuthentication.SetAuthCookie(...) make any difference with regards to security or code maintainability? As I understand it, the cookie is encrypted and used to identify a user on each request. I'm curious whether it should affect the design of the primary key on my Users table in my database, eg. Guid vs int or a unique username string.

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• Localization problems in iPhone

  - by user193545

  Hi I have been trying to localize my iPhone app in two languages - english and german I have created two folders en.lproj and de.lproj each containing Localizable.strings file for respective language. I have included these files in my resources folder, changed the encoding of these files to UTF-16. I have tried cleaning the project and building it again, deleting folder at path: Library/Application Support/iPhone Simulator/User But the problem is still there. Anybody having an idea please help.

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• Scripting an input element of an HTML form?

  - by dfjhdfjhdf

  By design I need an input element typed text but I do not need an input element typed submit. I want to submit what's written in the input element once the enter key pressed. How would I do that in JavaScript? Do I need tags and other stuff or could I do it without them (just using )?

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• Pass variables between separate instances of ruby (without writing to a text file or database)

  - by boulder_ruby

  Lets say I'm running a long worker-script in one of several open interactive rails consoles. The script is updating columns in a very, very, very large table of records. I've muted the ActiveRecord logger to speed up the process, and instruct the script to output some record of progress so I know how roughly how long the process is going to take. That is what I am currently doing and it would look something like this: ModelName.all.each_with_index do |r, i| puts i if i % 250 ...runs some process... r.save end Sometimes its two nested arrays running, such that there would be multiple iterators and other things running all at once. Is there a way that I could do something like this and access that variable from a separate rails console? (such that the variable would be overwritten every time the process is run without much slowdown) records = ModelName.all $total = records.count records.each_with_index do |r, i| $i = i ...runs some process... r.save end meanwhile mid-process in other console puts "#{($i/$total * 100).round(2)}% complete" #=> 67.43% complete I know passing global variables from one separate instance of ruby to the next doesn't work. I also just tried this to no effect as well unix console 1 $X=5 echo {$X} #=> 5 unix console 2 echo {$X} #=> "" Lastly, I also know using global variables like this is a major software design pattern no-no. I think that's reasonable, but I'd still like to know how to break that rule if I'd like. Writing to a text file obviously would work. So would writing to a separate database table or something. That's not a bad idea. But the really cool trick would be sharing a variable between two instances without writing to a text file or database column. What would this be called anyway? Tunneling? I don't quite know how to tag this question. Maybe bad-idea is one of them. But honestly design-patterns isn't what this question is about.

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• Java API for source formatting

  - by Marty Pitt

  Hi There are several PHP or js code formatting libs out there -- does anyone know if similar libs exist in Java? Ie., Given a string of code, return a formatted string with syntax colouring etc. It'd be ideal if it auto detected the language, but I might be pushing my luck there...

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• Java ME 3.0 SDK on Linux?

  - by Confused

  Is it possible to develop java me applications on linux? It appears that there is no linux version of the sdk. Otherwise what would you suggest as a good language to develop mobile applications?

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• difference between C(gcc 4.3.2) , C 99 strict(gcc 4.3.2) , C++(gcc-4.0.0-8) ,C++(gcc-4.3.2)

  - by user1139048

  I have the following questions concerning the differences between the four options: What is the main difference between the four options? Which of the above support int64_t or long long without suffix LL. I want a data type of the range 2^63 - 1 If your answer to my second question is not C(gcc 4.3.2) , whether the code I write in C(gcc 4.3.2) for C language will be valid in rest of the three options or do I have to modify something, then what will be those modifications.

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• Which IDE / code editor was the first to introduce a code completion feature?

  - by Uri

  I am trying to identify the point in time where code completion (autocomplete/intellisense/whatever) was first introduced in IDEs and would appreciate any pointers. By code completion here I mean a feature within the editor that offers methods or suggestions based on the code that was already typed, and I am interested in programming language related completions (not word processor style completion).

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• How do call this symbolic code transformation ?

  - by erric

  Hi, I often cross this kind of code transformation (or even mathematical transformation) (python example, but applies to any language) I've go a function def f(x): return x I use it into another one. def g(x): return f(x)*f(x) print g(2) leads to 4 But I want to remove the functional dependency, and I change the function g into def g(f): return f*f print g( f(2) ) leads to 4 too How do you call this kind of transformation, locally turning a function into a scalar ?

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• Is it okay to store user data in XML files?

  - by rity

  I have an app that is being used by a few users (< 12 users). There are less than 2000 records so I decided to use an XML file and store the file under \company\product\p.xml. Is this okay or am I breaking some design guidelines without realizing it? EnvironmentL .net/c#/winforms

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• website and protocol restriction (firewall application)

  - by Smith

  Am developing a firewall application that is suppose to restrict website/protocols/webs directories system wide that i choose for example restrict login.domain.com, but not domain.com restrict domain.com/passport not domain.com restrict .tld types e.g .org pls give me some ideas? [edit] Am developing on the windows plat form , from win 2000 to win7, using any vb language vb6 upwards also i want to be able to block any protocol http ftp etc.

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• Microsoft .NET security model

  - by Thomas

  Hi all, I am looking for informations about the security model of Microsoft .NET If you could explain me how it is design, or give me links to understand it, it would be very kind of you ! Thanks.

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• Save JSON outputed from a URL to a file

  - by Aidan

  Hey Guys, How would I save JSON outputed by an URL to a file? e.g from the Twitter search API (this http://search.twitter.com/search.json?q=hi) Language isn't important. Thanks! edit // How would I then append further updates to EOF?

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• What programming languages/platforms can read XML documents?

  - by matt

  I'm working on a class assignment that involves reading an XML document and inserting the contents into a database. Language choice is wide open - so I figure, why not consider all my options! What languages are able and appropriate for the reading of XML?

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• What to do to improve my skill and knowledge on javascript??

  - by caramel1991

  Currently I've finish studying the book name "beginning javascript 3rd edition",so i just wonder what should be my next step in order to strengthen myself on using and manipulating this language?Besides,how to improve myself in programming in javascript??Is it by thinking something cool myself,and start coding it??Or googling around the internet to find some task and question offered??Besides,is there any book that teaches the correct method of coding?? Thanks you

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• Checking a visitor's geographical location in a Django app

  - by cool-RR

  I am making a multilingual Django website. I want the site to check from which country the user is accessing the website, and according to that decide which language to use. What would be a good tool to use for that?

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• domain name vs ip address, same server, but different speed

  - by bn

  I have two similar sites: - two of them have almost exactly the same codes, and running on the same server - both sites are the same, they just use different language. - database of the slower site is populated (maybe only the user table) the other tables for site content is the same - the faster uses root to access database one of the sites is not released yet, so it uses IP Address to access the site instead of domain name the site that is using IP address is faster (lot faster) the site that is using domain name is slower do you know why is this happening what could be the reason?

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• What is your reporting tool of choice?

  - by jms

  Every project invariably needs some type of reporting functionality. From a foreach loop in your language of choice to a full blow BI platform. To get the job done what tools, widgets, platforms has the group used with success, frustration and failure?

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• rewards the products qualify for

  - by Rod

  products purchased -------------------------- bana bana bana stra kiwi reward requirements table (related to a rewards table) reward id, products ---------------------- 1,bana 1,bana 1,bana 2,stra 2,bana 3,stra 4,cart 5,bana 5,bana 5,oliv Can you help me with sql to get rewards the products purchased qualifies for? In the case above the reward ids would be: 1 2 3 If there is a better design that would make the solution easier I welcome those as well. I'm using product names for the sake of easier explaining, I hope. (I'll replace with product ids later)

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• Which conventions, events, etc. should I look into attending?

  - by perlox

  I am a student programmer and relatively new to the industry. Once I get out into the real world and have money to blow, which events/conventions/conferences/etc. should I look into attending? Which do you consider a must-attend-at-least-once-in-your-life-as-a-developer type of event? Just to clarify, any language, company, size, are acceptable. I'm mostly looking to generate a list of highly regarded conferences for a variety of different fields/interests.

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• How is this GUI principle called?

  - by ripper234

  "Prefer to design UI that guides the user to provide correct input before submitting a form over presenting an error message when he submits it incorrectly" Is there a canonical link that explains this (similar to KISS)?

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• Can you suggest some UI related flex 3 interview questions for a senior pos?

  - by mohan talluri

  Our Company is looking for a sr.flex developer. As part of interview process customized UI understanding and implementation is also included. I am Usability&design Lead for the same product team have some understanding of flex 3 but am not sure if pure UI/usability questions can be answered by flex developer. So can you suggest some UI related questions to see if he/she has competency to refer a prototype(html/mockup's) and build the same UI in flex.

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