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• Updating an atom with a single value

  - by mikera

  I have a number of atoms in my code where a common requirement is to update them to a new value, regardless of the current value. I therefore find myself writing something like this: (swap! atom-name (fn [_] (identity new-value))) This works but seems pretty ugly and presumably incurs a performance penalty for constructing the anonymous closure. Is there a better way?

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• Pretty Pixel-level Picture Painting, Programatically

  - by dreeves

  My mac laptop has 1,024,000 pixels. What's the simplest way to turn my display completely black and go nuts with writing little programs to twiddle pixels to my heart's delight? To make it more concrete, say I wanted to implement the Chaos Game to draw a Sierpinski triangle, at the pixel level, with nothing else on the screen. What are ways to do that?

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• Response, Result, Reply, which is best?

  - by Robert Gould

  I'm refactoring some client-server code and it uses the terms Response, Result & Reply for the same thing (an answer from the server). And although its not really that important it's become hard to guess which word to use while writing new code, so I'd like to unify the three terms into one and do the appropriate refactoring, but I'm not sure which word is the "best", if there is such a thing. Any suggestions based on precedence and standards towards naming for this case?

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• Given an array of integers [x0 x1 x2], how do you calculate all possible permutations from [0 0 0] t

  - by user319951

  I am writing a program that takes in an ArrayList and I need to calculate all possible permutations starting with a list of zeroes, up to the value in the corresponding input list. Does anyone know how to iteratively calculate these values? For example, given [ 1 2 ] as input, it should find and store the following lists: [0 0], [1 0], [1 1], [1 2], [0 1], [0 2] Thanks!

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• Performance Cost of a Memcopy in C/C++

  - by Cenoc

  So whenever I write code I always think about the performance implications. I've often wondered, what is the "cost" of using a memcopy relative to other functions in terms of performance? For example, I may be writing a sequence of numbers to a static buffer and concentrate on a frame within the buffer, in order to keep the frame once I get to the end of the buffer, I might memcopy all of it to the beginning OR I can implement an algorithm to amortize the computation.

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• Mobile Silverlight Applications

  - by snorlaks

  Hi, Have You got any tutorials, books, any good resources to start creating mobile games using silverlight ? Maybe any good resource on writing 2d games in silverlight for pc? Ay way do You think that its worth learning it or any other technology would be better and have probably shinier future ?

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• How to apply two functions on the same string without using ">>"

  - by altair211

  Hi, I am writing a function like this. func :: IO() func = putStr print "func = putStr print" I know it is incorrect but the idea is I want the putStr applied to the string then print applied to the same string "fun = .." so that the output would be: func = putStr print "func = putStr print" which is the same as my function definition. Thanks

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• Initializing a C++ vector to random values... fast

  - by Flamewires

  Hey, id like to make this as fast as possible because it gets called A LOT in a program i'm writing, so is there any faster way to initialize a C++ vector to random values than: double range;//set to the range of a particular function i want to evaluate. std::vector<double> x(30, 0.0); for (int i=0;i<x.size();i++) { x.at(i) = (rand()/(double)RAND_MAX)*range; } EDIT:Fixed x's initializer.

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• How can I terminate a multicast stream (asr - Mac) in a script?

  - by user355896

  Hello, I'm making a script to to run a bunch of multicast asr streams, but I do not know how to "stop" or "end" a multicast asr stream after a certain amount of time. Loop Suspend does not do what I'm looking for. I've also tried to add a sleep command followed by a kill command, but they kick in after the stream ends (so that approach does not work). Thanks for any possible help! By the way, I'm writing this script in bash.

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• how can i get data from excel via "select statement" in sql 2005?

  - by Phsika

  is there any method to get data from excel to sql ? i think that we can do without any writing C#codes. For example : select * from MyExcellFile.xls.Sheet1. Or may be any wizard in sql?

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• When should we use Mockery vs JUnit4Mockery?

  - by Aman

  If writing a Java unit test with mocking using JMock, should we use Mockery context = new Mockery() or Mockery context = new JUnit4Mockery() What is the difference between the two, and when should we use which?

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• How does MEF affect your application load times?

  - by Román

  Hi all I'm currently investigating MEF to know the feasibility of some kind of plugin subsystem for a software we are writing at my company. One of the first questions that came to my mind is to know the influence of MEF components in the application load time. Moreover, if that's something of significant weight, is it possible to load those components completely at runtime? Thanks in advance Roman

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• What programming language to choose

  - by Pradeep

  We need to write a script that needs to process movies (using C-based ffmpeg) and also update our databases. Also there would be some thread programming to accomplish with a worker-manager design. I am thinking of writing this in Ruby is there any good language to do this, if so what is its primary advantage for choosing? We are based on the Mac platform. Thanks in advance.

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• Array of function pointers in Java

  - by Waltzy

  I have read this question and I'm still not sure whether it is possible to keep pointers to methods in an array in Java, if anyone knows if this is possible or not it would be a real help. I'm trying to find an elegant solution of keeping a list of Strings and associated functions without writing a mess of hundreds of 'if's. Cheers edit- 'functions' changed to 'methods', seems to bug people.

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• How do I add a css class to the TempData output?

  - by Pete

  The TempData output is plain text and putting a div around it will leave a formatted but empty div on the screen if there is no TempData. Is there a way to apply a class to it so that it only shows when the TempData item is set? Other than writing the div code into the TempData, which seems like a horrible idea.

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• How could i avoid the SAVE dialog in my custom blackberry Application?

  - by SIA

  Hi Everybody, I am writing a blackberry application and pushing screens one after another(three in series) Screen1 displays Screen2 and Screen2 displays Screen3 When i press "Back Key" on my Blackberry Device i.e., bold 9700, its prompts a dialog box with Question mark image and buttons "Save" "Discard" "Cancel". Why does this dialog appears? How can i avoid this dialog? Please Help Thanks SIA

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• In python, is there a simple way to connect to a mysql database that doesn't require root access?

  - by Matthew

  I'm writing a script to parse some text files, and insert the data that they contain into a mysql database. I don't have root access on the server that this script will run on. I've been looking at mysql-python, but it requires a bunch of dependencies that I don't have available. Is there a simpler way to do this?

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• IE8 Session sharing across tabs and windows

  - by Clint

  Has anyone implemented any effective solutions to address the numerous issues that are caused by IE8's session sharing functionality? We've gotten very close by writing a custom http module that compares session and view state values, but our efforts are thwarted by things such as accelerator keys and unaccceptable copying of session objects. This is a VB.Net web app.

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• WHERE vs HAVING

  - by baloo

  Why is it that you need to place columns you create yourself (for example "select 1 as number") after HAVING and not WHERE in MySQL? And are there any downsides instead of doing "WHERE 1" (writing the whole definition instead of a column name)

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• C Question: How to store data inside the executable file

  - by michael

  Hello all, complete newbie here, I need to find a way to store 250 KB of plain text numbers inside my program's executable file. Usually, I would put the data in a separate file and let the program read it while it is running, but that's not an option here. Instead, the program and the data need to be in one executable file. I have absolutely no idea how to do it (except writing 250.000 #defines :-) and I'd appreciate any suggestions. Thank you very much!

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• Class definition thinks setting a variable is a Unit?

  - by DeLongey

  Writing out a Scala class and problem here is that the compiler thinks that the code is a unit not returning the proper value. It's a method used to set a property in the class: def setObject(`object`:StripeObject):StripeObject = { this.`object` = `object` } The error is: type mismatch; found : Unit required: com.stripe.StripeObject The full class is: case class EventData(var previousAttributes: HashMap[String,Object], var `object`:StripeObject) extends StripeObject { def getPreviousAttributes = { previousAttributes } def setPreviousAttributes(previousAttributes: HashMap[String, Object]) = { this.previousAttributes = previousAttributes } def getObject = { `object` } def setObject(`object`:StripeObject):StripeObject = { this.`object` = `object` } } How do I make sure it doesn't return a Unit?

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• Why does /**[newline] not always insert the Javadoc template including @param and @return in Eclipse

  - by Bas van den Broek

  I'm documenting code in Eclipse and have been using the /** followed by Enter alot to insert the Javadoc template. However this does not always work for some reason, it will create the template for writing comments but it won't automatically insert the @param and @return text. If I copy the exact same method to another class it will insert the full template. It would be a big help if anyone could tell me why it won't do this in some situations.

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• How can I invoke linux programs from C#/Mono?

  - by Thiado de Arruda

  I've been using MonoDevelop and Make to execute some build taks on a C project under linux, but I decided to abandon Make and switch to NAnt since I am more proficient in writing C# programs than Make/shell scripts, so I decided to write a custom NAnt task in C# to replace my Makefile. So, how can I invoke GCC or other shell commands from C#?

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• Inserting and updating data in Excel

  - by user303907

  Hello, So far all the Excel stuff revolves around opening a file, writing values to it and saving it. Is there a way to update the data in the Excel (while it's opened) automatically? Thanks!

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• Is it possible to write an Addin that works in both Excel 2003 and 2007?

  - by user169867

  I've been writing a shared addin for Excel 2003. It adds a menu (CommandBarPopup) and a couple menu items off it (CommandBarButton) that when clicked open a WPF window to read a couple values and manipulate the worksheet. Is there a way to write it so that it would work in office 2007/2010 as well, or is it impossible? If so, can anyone provide instructions for how that is done?

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