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  • lists:keyfind problems

    - by dagda1
    Hi, I cannot for the life of me get lists:keyfind to work as I expect in Erlang. I have the following eunit test: should_find_key_test() -> NewList = lists:keystore("key", 1, [], {"key", "value"}), Value = case lists:keyfind("key", 1, NewList) of false -> notfound; {_key, _value} -> _value end, ?debugVal(Value). Whenever I run this test I get the following error message: indextests:should_find_key_test (module 'indextests')...failed ::error:undef in function lists:keyfind/3 called as keyfind("key",1,[{"key","value"}]) in call from indextests:should_find_key_test/0 Can anyone see what I am doing wrong? Is it saying that lists:keyfind no longer exists? Cheers Paul

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  • JSP property lookup error

    - by AEIOU
    I'm getting the following error in ours logs: Error looking up property "foo" in object type "foo.bar". Cause: null java.lang.reflect.InvocationTargetException at sun.reflect.GeneratedMethodAccessor363.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.commons.beanutils.PropertyUtilsBean.invokeMethod(PropertyUtilsBean.java:1773) I cannot for the life of me recreate it, I was wondering if anyone has any experience with this kind of problem with JSP/Java Bean. What I wanted to know was, will this prevent the user from getting the web page to show up? I know this isn't a whole lot of information, but any advice could help.

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  • Applying a function with multiple inputs using Map? (Haskell)

    - by Schroedinger
    G'day guys, Trying currently to finish up a bit of homework I'm working on, and having an issue where I'm trying to apply map across a function that accepts multiple inputs. so in the case I'm using processList f (x:xs) = map accelerateList f xs x xs processList is given a floating value (f) and a List that it sorts into another List Accelerate List takes a floating value (f) a List and a List Object through which it returns another List Object I know my Accelerate List code is correct, but I cannot for the life of me get the syntax for this code working: processList :: Float -> [Object] -> [Object] accelerate f [] = [] accelerate f [x] = [(accelerateForce f x x)] accelerate f (x:xs) = map accelerateList f xs x xs Any ideas? I've been scratching my head for about 3 hours now. I know it's something really simple.

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  • Wrong root on image_tag, include_tags, etc

    - by Newy
    On my dev setup, generated routes are mysteriously pointing to my public www server. <%= javascript_include_tag :defaults % [yields] <script src="http://www.mysite.com//javascripts/prototype.js?1265304231" type="text/javascript"></script> <script src="http://www.mysite.com//javascripts/effects.js?1265304231" type="text/javascript"></script> <script src="http://www.mysite.com//javascripts/dragdrop.js?1265304231" type="text/javascript"></script> <script src="http://www.mysite.com//javascripts/controls.js?1273647885" type="text/javascript"></script> <script src="http://mysite.opzi.com//javascripts/application.js?1273611341" type="text/javascript"></script> Where is this option set? Can't find it for the life of me.

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  • How does one write extconf.rb files when one extension includes header files from another?

    - by mohawkjohn
    This is a follow-up question for: Multiple Ruby modules under one directory What happens if these extensions include each other? For example, you have the following structure: ext/foo ext/bar In ext/bar/bar.h, you have a #include "foo.h" foo.h and foo.cpp compile to form foo.o, to make life a little more complicated. Finally, it is necessary that foo and bar be separate extensions. How is this managed? I can't figure out how to add ../foo to the search path for bar.h, primarily. Symbolic links seem hack-ish.

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  • libxml2 install error: command 'gcc' failed with exit status 1? What are the dependencies of libxml2

    - by SIA
    Hi everybody!! I am trying to install libxml2 on unbuntu 9.10 and getting errors: $ sudo python setup.py develop Its a very lengthy error message but the last error is Setup script exited with error: Command 'gcc' failed with exit status 1. Can anybody tell me why i am getting this error? What are the dependencies or libraries required to install this? scenario: I am trying to setup the reddit.com clone, and when i run develop command, its generating a huge error as stated above. Please help!! Thanks in advance And my many thanks to Stackoverflow team for having such a life saving site.

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  • JSF skips phases - How to debug that?

    - by Pentius
    Hey fellows, I have to debug a foreign jsf application thanks god. The problem is, that I submit a form, but the values aren't carried over. With a phase listener I can see, that the life cycle doesn't run completely through, so to say it skips phase 2 -5: After the restore view phase, the render response phase is directly called. I miss the apply values, validation, update model actions and so on. So, this could be a chicken-and-egg problem: 1. The responsible phases aren't called, so the new form input can't be carried over. 2. The system doesn't recognize any new input and therefore directly renders after restoring the view. I checked that there is no call of responseComplete() oder renderResponse(). I'm stuck somehow. Any idea to validate one of the two hypothesis? Or how to debug that in general? Did anybody have a similar problem?

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  • How do I get the path of the current executed file in python?

    - by Sorin Sbarnea
    This may seam a newbie question but it is not. It looks that common approaches are not always working: Currently I know only two options but none of them looks to work an all cases. sys.argv[0] This means using path = os.path.abspath(os.path.dirname(sys.argv[0])) but this does not work if you are running from another python script from another directory, and this can really happen in real life. __file__ this means that path = os.path.abspath(os.path.dirname(__file__)) but I found that this doesn't work: py2exe that doesn't have a __file__ attribute but there is an workaround. when you run from IDLE with execute() there is no __file__ attribute OS X 10.6 where I get NameError: global name '__file__' is not defined Related questions with incomplete answers: http://stackoverflow.com/questions/1296501/python-find-path-to-file-being-run http://stackoverflow.com/questions/1483827/python-path-to-current-file-depends-on-how-i-execute-the-program http://stackoverflow.com/questions/2259503/how-to-know-the-path-of-the-running-script-in-python http://stackoverflow.com/questions/509742/python-chdir-to-dir-the-py-script-is-in

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  • Terminating app due to uncaught exception / / SIGABRT // C++ please help!

    - by user282076
    I have just finished one of my apps when I got this message. I cannot for the life of me work out what is wrong. (gdb) continue 2010-02-26 14:05:51.443 BrainTester[2638:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIViewController _loadViewFromNibNamed:bundle:] was unable to load a nib named "SplitSecondViewController"' 2010-02-26 14:05:51.452 BrainTester[2638:207] Stack: ( 861696817, 860329709, 861252493, 861252395, 835170725, 835170141, 835074651, 13515, 834774231, 834773467, 835014237, 835012689, 835011495, 861063661, 861449261, 861447005, 834770767, 834765939, 11025, 10920 ) terminate called after throwing an instance of 'NSException' Program r eceived signal: “SIGABRT”. (gdb) If someone can help, any help is appreciated.

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  • Improving my career in web development

    - by Dilse Naaz
    Hi I am a new guy in web development using .net technology. I have strong ambition to make up a good career in this field. But when i starting to learn something from the internet tutorials, i can't complete that. I will stop the reading before completion. so i decided everyday to start a new life in development. But i cant to do that. please help me for improving my career by suggesting some tips for increasing the concentration or something like that. thanks in advance.

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  • Python continue from the point where exception was thrown

    - by James Lin
    Hi is there a way to continue from the point where exception was thrown? eg I have the following psudo code unique code 1 unique code 2 unique code 3 if I want to ignore the exceptions of any of the unique code statements I will have to do it like this: try: #unique code 1 except: pass try: #unique code 2 except: pass try: #unique code 3 except: pass but this isn't elegant to me, and for the life of me I can't remember how I resolved this kind of problem last time... what I want to have is something like try: unique code 1 unique code 2 unique code 3 except: continue from last exception raised

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  • How can I most accurately calculate the execution time of an ASP.NET page while also displaying it o

    - by henningst
    I want to calculate the execution time of my ASP.NET pages and display it on the page. Currently I'm calculating the execution time using a System.Diagnostics.Stopwatch and then store the value in a log database. The stopwatch is started in OnInit and stopped in OnPreRenderComplete. This seems to be working quite fine, and it's giving a similar execution time as the one shown in the page trace. The problem now is that I'm not able to display the execution time on the page because the stopwatch is stopped too late in the life cycle. What is the best way to do this?

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  • How can I do this Aggrigate, group by, in query in LINQ?

    - by Ólafur Waage
    Please do not give me a full working example, I want to know how this is done rather than to get some code I can copy paste This is the query I need, and can't for the life of me create it in LINQ. SELECT * FROM dbo.Schedules s, dbo.Videos v WHERE s.VideoID = v.ID AND s.ID IN ( SELECT MAX(ID) FROM dbo.Schedules WHERE ChannelID = 1 GROUP BY VideoID ) ORDER BY v.Rating DESC, s.StartTime DESC I have the "IN" query in LINQ I think, it's something like this var uniqueList = from schedule in db.Schedules where schedule.ChannelID == channelID group schedule by schedule.VideoID into s select new { id = s.Max(i => i.ID) }; It is possibly wrong, but now I can not check in another query for this in a where clause uniqueList.Contains(schedule.ID) There is possibly a better way to write this query, if you have any idea I would love some hints. I get this error and it's not making much sense. The type arguments for method 'System.Linq.Queryable.Contains(System.Linq.IQueryable, TSource)' cannot be inferred from the usage. Try specifying the type arguments explicitly.

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  • With Rails 3 routes, how do you only allow a requests from 127.0.0.1?

    - by micah
    I'm writing an app where several of the routes should only be accessible from localhost. It looks like this is possible with the new routing system. http://www.railsdispatch.com/posts/rails-3-makes-life-better This has examples of restricting routes based on IP address, and setting up an IP address blacklist for your routes, but I'm interested in a whitelist with just one IP address. It would be cool if something like this worked: get "/posts" => "posts#show", :constraints => {:ip => '127.0.0.1'} But it didn't. Am I just missing the right syntax?

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  • Problem in running website project

    - by Durga Dutt
    When a run my website project then it gives me error of 'Unable to connect to asp development server'. I am using Visual Studio 2010. Only my website projects are having these prblems. I have tried reinstalling vs2010 . But again & again i m having same problem. Please help me. Thanks in advance & Happy New Year 2011. I wish this will bring a lot of happiness and prosperity in everyone's life.

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  • Audio Playback Rate in Android

    - by Marquis
    So, I know that this has been done with a few Android apps before, but I cannot for the life of me figure out how, since it's not currently possible through the API. How does one adjust the playback rate of a sound played through MediaPlayer; either with or without adjusting the pitch is fine for now, though the latter is definitely preferred. If someone can point me in the direction of an open source app that I can use as guidance, that would also be fine. Thanks in advance.

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  • How To Configure Query Cacheing in EclipseLink

    - by rustyshelf
    I have a collection of states, that I want to cache for the life of the application, preferably after it is called for the first time. I'm using EclipseLink as my persistence provider. In my EJB3 entity I have the following code: @Cache @NamedQueries({ @NamedQuery( name = "State.findAll", query = "SELECT s FROM State s", hints = { @QueryHint(name=QueryHints.CACHE_USAGE, value=CacheUsage.CheckCacheThenDatabase), @QueryHint(name=QueryHints.READ_ONLY, value=HintValues.TRUE) } ) }) This doesn't seem to do anything though, if I monitor the SQL queries going to MySQL it still does a select each time my Session Bean uses this NamedQuery. What is the correct way to configure this query so that it is only ever read once from the database, preferably across all sessions? Edit: I am calling the query like this: Query query = em.createNamedQuery("State.findAll"); List<State> states = query.getResultList();

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  • C++ Singleton design pattern.

    - by Artem Barger
    Recently I've bumped into realization/implementation of Singleton design pattern for C++. It has looked in the following way (I have adopted it from real life example): // a lot of methods is omitted here class Singleton { public: static Singleton* getInstance( ); ~Singleton( ); private: Singleton( ); static Singleton* instance; }; From this declaration I can deduce that instance field is initiated on the heap, that means there is a memory allocation. That is completely unclear for me is when does exactly memory is going to be deallocated? Or there is a bug and memory leak? It seems like there is a problem in implementation. PS. And main question how to implement it in the right way?

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  • Why does Python's __import__ require fromlist?

    - by ieure
    In Python, if you want to programmatically import a module, you can do: module = __import__('module_name') If you want to import a submodule, you would think it would be a simple matter of: module = __import__('module_name.submodule') Of course, this doesn't work; you just get module_name again. You have to do: module = __import__('module_name.submodule', fromlist=['blah']) Why? The actual value of fromlist don't seem to matter at all, as long as it's non-empty. What is the point of requiring an argument, then ignoring its values? Most stuff in Python seems to be done for good reason, but for the life of me, I can't come up with any reasonable explanation for this behavior to exist.

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  • How do I wrap this BAIL macro in Xcode?

    - by willc2
    I use this little snippet to halt my iPhone app in the simulator. NSAssert((0), @"Bail early while testing"); When I try to make it a #defined macro like this: #define BAILNOW (NSAssert((0), @"Bail early while testing")) I get this build error: error: expected expression before 'do' It seems to be related to the nesting of the NSAssert() macro but I'm at a loss as to how to get around it. Should I dig into the NSAssertionHandler docs or is there some simpler way to halt the app in it's tracks? Or should I just set a breakpoint and get on with my life?

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  • Good or common naming conventions for xsd target namespaces

    - by Anne Schuessler
    I'm looking for some ideas for good naming conventions for xsd target namespaces. Basically I just need to make a definite decision on how to name the target namespace of my xsd so I try to get it right the first time. Changing it later would require changes to another system which is not in my control. Do you have any experience from past XML schema creations on what is a good and working solution? I've tried to find information online, but most examples just use very generic target namespaces like "http://exampleSchema" and similar. I'm actually trying to find some real life examples.

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  • C++Math evaluating incorrectly

    - by Hayden
    I thought I can make life a little easier in data statistics by making a small program which returns the results of sampling distribution of the mean (with standard error). It does this part successfully but in an attempt to return the z-score by using the formula I found here, it returns -1#IND. My interpretation of that formula is: ((1/(sqrt(2*pi)*stdev))*pow(e, (normalpow)) where double normalpow=-0.5*((mean-popmean)*(mean-popmean)/stdev) I did a little more investigating and found that (mean-popmean)*(mean-popmean) was evaluating to 0 no matter what. How can I get around this problem of normalpow evaluating to 0.

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  • Redmine & Git integration

    - by archnemesis
    I am considering moving from svn and Trac to git and Redmine. I'm just wondering what everyone's experience is of this. How well does git integrate with Redmine? I'm pretty set on my decision to change from svn to git - our distributed work, and need to frequently branch and merge would make life considerably easier with git. But we would possibly need to split things into multiple projects for this. From what I have been reading, git and multiple projects don't integrate too smoothly with Trac. That aside, in my investigations into git, Redmine has also caught my attention, and some of the features look very useful. However, I haven't found as many user experiences of git and Redmine as what I'd like (possibly due to my lack of searching skills...) and so would like to hear your opinions and examples.

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  • Cake PHP Error: Make sure you have created index.ctp (???)

    - by Louis Stephens
    I was just starting to learn cakephp today by going through a "blog tutorial". I created my blog_controller.php and then created a folder named 'blog' with the apps/views/ structure. The next step in the tutorial was to create the index.ctp file within the blog folder under views. In the tutorial it declares that all error messages should be gone. However, I still receive an error message: Error: The view for BlogController::index() was not found. Error: Confirm you have created the file: /Users/trippstephens/Dropbox/cakephp-cakephp1x-348e5f0/app/views/blog/index.ctp For the life of me, I can not figure out what I have done wrong. I am running cakephp under MAMP and it "installed" successfully. Any help would be appreciated.

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  • jQuery ajax request to php, how to return plain text only

    - by jyoseph
    I am making an ajax request to a php page and I cannot for the life of me get it to just return plain text. $.ajax({ type: 'GET', url: '/shipping/test.php', cache: false, dataType: 'text', data: myData, success: function(data){ console.log(data) } }); in test.php I am including this script to get UPS rates. I am then calling the function with $rate = ups($dest_zip,$service,$weight,$length,$width,$height); I am doing echo $rate; at the bottom of test.php. When viewed in a browser shows the rate, that's great. But when I request the page via ajax I get a bunch of XML. Pastie here: http://pastie.org/1416142 My question is, how do I get it so I can just return the plain text string from the ajax call, where the result data will be a number? Edit, here's what I see in Firebug- Response tab: HTML tab:

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