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  • Idiomatic scheme and generic programming, why only on numbers ?

    - by Skeptic
    Hi, In Scheme, procedures like +, -, *, / works on different types of numbers, but we don't much see any other generic procedures. For example, length works only on list so that vector-length and string-length are needed. I guess it comes from the fact that the language doesn't really offer any mechanism for defining generic procedure (except cond of course) like "type classes" in Haskell or a standardized object system. Is there an idiomatic scheme way to handle generic procedures that I'm not aware of ?

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  • Django: Template should render 'description' not actual value

    - by Till Backhaus
    Hi, in a Model I have a CharField with choices: class MyModel(models.Model): THE_CHOICES=( ('val',_(u'Value Description')), ) ... myfield=models.CharField(max_length=3,choices=THE_CHOICES Now in the template I access an instance of MyModel: {{ my_instance.myfield }} Of course the gives me val instead of Value Description. How do I get the description? Thanks in advance!

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  • How computer multiplies 2 numbers?

    - by ckv
    How does a computer perform a multiplication on 2 numbers say 100 * 55. My guess was that the computer did repeated addition to achieve multiplication. Of course this could be the case for integer numbers. However for floating point numbers there must be some other logic. Note: This was asked in an interview.

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  • Good Software development courses?

    - by user296970
    I'm a software developer with a BS in Computer Science. I've been working in the field for 5 years, and I'm looking to develop my project leadership skills (I'm currently not a lead). Does anyone have any suggestions as to which schools / programs I can do? A masters is probably out of the question, due to the time required (and my not so good verbal score on my GRE). A shorter course would be preferable.

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  • Weird behaviour of Calendar and DateFormat

    - by Nejc
    I encountered really strange behaviour when constructing a Calendar object and then formating it in a particular style. Let the code do the talking: public class Test { public static void main(String[] args) { SimpleDateFormat frmt = new SimpleDateFormat(); frmt.applyPattern("yyyy-MM-dd"); GregorianCalendar date = new GregorianCalendar(2012,1,1); System.out.println(frmt.format(date.getTime())); } } The output is: 2012-02-01 The expected output is of course: 2012-01-01 What am I doing wrong?

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  • TFS 2010 Invoke built-in activity from custom CodeActivity

    - by Rhapsody
    Hi, I'm trying to invoke a built-in activity from my custom CodeActivity for the TFS2010 Build Process. I've got my own CodeActivity which generates a batch file and I want to invoke the InvokeProcess activity (built-in) to execute that generated file. Of course I could split it into two activities, but it would be nicer if I could put these actions together. Can somebody push me in the right direction? Thanks in advance!

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  • jQuery Prototype conflict, alternative solutions

    - by lbolognini
    I have a problem as I'm conditionally including the Prototype-based Lightbox script for IE6 as it works better than the jQuery plugin. Of course the two libraries conflict but the official solution is not really feasible for me as i would have to replace tons of $ with the alternative no-conflict syntax. Is there any other solution for me, keeping in mind that in my case it would be easier to have Prototype work nicely with jQuery than the other way around?

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  • Can I have a workspace that is both a git workspace and a svn workspace?

    - by Troy
    I have checked out now a local working copy of a codebase that lives in an svn repo. It's a big Java project that I use Eclipse to develop in. Eclipse of course builds everything on the fly, in it's own way with all the binaries ending up in [project root]/bin. That's perfectly fine with me, for development, but when the build runs on the build server, it looks quite a lot different (maven build, binaries end up in a different directory structure, etc). Sometimes I need to recreate the build server environment on my local development system to debug the build or what have you, so I usually end up downloading an entirely new working copy into a new workspace and running the build from there (prevents cluttering my development workspace with all the build artifacts and dirtying up the working copy). Of course sometimes I'm interested in running the full build on code that I don't want to check in yet, so I will manually copy over the "development" workspace onto the "build" workspace. Besides taking a lot of extra time copying a lot of files that I don't actually need (just overlaying the new over the old), this also screws up my svn metadata, meaning that I can't check in changes from that "build workspace" working copy, and I often end up having to re-download the code to get it back into a known state. So I'm thinking I make my svn working copy a local git repo, then "check out" the in-development code from the svn working copy/git master, into the local build workspace. Then I can build, revert my changes, have all the advantages of a version controlled working copy in the build workspace. Then if I need to make changes to the build, push those back into the git master (which is also a svn working copy), then check them into the main svn repo. |-------------| |main svn repo| <------- |---------------------| |-------------| |svn working copy | <------- |--------------------| | (svn dev workspace/ | | non-svn-versioned | | git master) | | build workspace | |---------------------| | (git working copy) | |--------------------| Just switching everything to git would obviously be better, but, big company, too many people using svn, too costly to change everything, etc. We're stuck with svn as the main repo for now. BTW, I know there is a maven plugin for Eclipse and everything, I'm mainly interested to know if there is a way to maintain a workspace that is both a git working copy and an svn working copy. Actually any distributed version control system would probably work (hg possibly?). Advice? How does everybody else handle this situation of having a to manage both a "development" build process and a "production" build process?

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  • Is it possible to write vertically in a textview in android?

    - by Sephy
    LEts say you have a normal textview, with "Stackoverflow" written in it, I would like to know if it it possible to rotate the textview about -90°, to have the S at the bottom and the W at the top of the screen? of course, i could write my text in an image, rotate it and use it that way, but im interested in text right now. thank you

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  • Studying for the 70-564 exam

    - by Pete
    Besides the searching MSDN with the course outline, there is little out there to help prepare for the 70-564 exam . Some say that using the 70-547 Training Kit book helps, but does anyone know (as a rough percentage) how much of the 70-547 book covers the 70-564 exam?

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  • About import statement in Java

    - by user198729
    test.java: import javax.media; Which directories are javax.media searched from? I suppose those in CLASSPATH specified by javac -cp will of course be searched. But will it also search in the directory where test.java locates? And are there any other possible places that will be searched?

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  • What font and size is used in Windows 7 File Explorer Tree

    - by Stefan Koell
    I am having a hard time to find out which font is used by the Win 7 File Explorer in the tree view on the left hand side. Better, of course, would be if I can programmatically find out which the right font is (C#). I searched the Windows 7 design guidelines but this particular scenario is not listed (at least I couldn't find it). So anyone good with fonts?

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  • Is there a true all-in-one solution for PHP Development?

    - by Alex R
    I'm looking for a "SINGLE INSTALLER" solution for PHP Development. Is there anything out there which will give me a nice IDE, Web Server, Debugger, Database, etc, on a single install image (*.msi or *.exe)? This of course would be completely opposite of Eclipse PDT, which requires you to search and locate a bunch of additional components which never quite work together.

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  • Axis2 Web Service Client Generation - Types without modifying the client

    - by sstarcher
    Is it possible with Axis2 and Eclipse to generate a Web Service client and have it use java types that you already have in packages instead of creating it's own types. Reason being of course if I have type A already created and it creates it's own Type A I can't just assign variable of type A to variable of type B. The wsdl is being generated from a Web Service deployed to an application server. If it's not possible to generate it from that would it be possible to generate a client from the already existing java files.

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  • LaTeX verbatim that can break too long lines?

    - by kotlinski
    I want to generate a PDF of user-submitted text using LaTeX. To handle crazy user input, I first thought about using the verbatim package, but of course it doesn't break up too long lines. Is there some package that works similar to verbatim (i.e., accept any input) but formats the text nicely?

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  • how does Enumerable#cycle work? (ruby)

    - by Radek
    looper = (0..3).cycle 20.times { puts looper.next } can I somehow find the next of 3? I mean if I can get .next of any particular element at any given time. Not just display loop that starts with the first element. UPDATE Of course I went though ruby doc before posting my question. But I did not find answer there ...

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  • Dynamic picture that displays the visitors IP address?

    - by Rob
    I see this a lot now, jpg files displaying your IP address. To you of course, not to others, they would see their own For example: How is this even possible? If this is possible, would it be possible to log an IP into a MySQL database from the picture as well? Is my IP getting logged when I view this?

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  • WPF ListView Show selected item

    - by Jeffrey
    hi, i want to show the selected item in a list view automatically(it isn't possible to show all items without scrolling). this.listView.SelectedIndex = 999; selects of course an item, but it doesn't show it. what can i use to show it automatically ? kind regards, jeff

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  • How to invert alternate bits of a number

    - by Cupidvogel
    The problem is how to invert alternate bits of a number, starting from the LSB. Currently what I am doing is first doing a count = -1 while n: n >>= 1 count += 1 to first find the position of the leftmost set bit, then running a loop to invert every alternate bit: i = 0 while i <= count: num ^= 1<<i i += 2 Is there a quick hack solution instead of this rather boring loop solution? Of course, the solution can't make any asumption about the size of the integer.

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  • drupal taxonomy

    - by slimcady
    I have several different content type nodes (videos, image galleries, stories...) that I would like to categorize and create a top-level page that aggregates these nodes. So for example, the top-level page would have teaser thumbnails very similar to the front page view but of course filtered for that topic (like for instance automobiles, and motorcycles would have its own page, etc...). What is the best way to accomplish this? Taxonomy? Views?

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  • Haskell - interpreting a number

    - by Abstract
    I have a number 9877342931235. Using Haskell, I need to show it as: 987-734293-123-5 i've tried interspersing the list but of course that puts '-' between every digit. How would I do it to yield the actual result?

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  • How to apply query to model if field not filtered

    - by jdog
    I have a range of modules running on generator.yml. In some of those I would like to hide records by default of Status: CLOSED (being the last of a range of Statuses). OF course if the user filters for CLOSED i want to show these records. I thought it would make sense to apply andWhere('status_id=?',Status::CLOSED) in a specific table_method , but how do I access the filters of the module from within the model? Is there a better way to do this?

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