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  • Rails equivalent of respond_to |format| with a straight render

    - by brad
    I'm working with ActiveResource a lot so my service models are only using XML. Thus, I have no need for a respond_to block, I literally just render :xml => @model I can't however figure out how to render a 404 header using this. I've had to resort to respond_to, which I think adds a few unnecessary method calls. Here's what I'm using: respond_to do |format| if (record_found) render :xml => @some_record else format.xml{ head :not_found } end end but I just want something like render :xml => head :not_found which doesn't work. Can anyone tell me the proper syntax?

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  • setup.py install dependency too?

    - by Jason Sundram
    I have a python source distribution, and it depends on some other modules that I've also made. The directory tree looks like this. I've written a setup.py file for one of those modules (pydirac225, for those of you who are following along at home), and I want to have that setup.py called from the main setup.py? Another module dependency (pysoundtouch14) has a setup.py file, but the contents of it are basically pasted into the main setup.py script. It seems more modular to allow each of these components to specify how they are set up, and allow the main setup file to invoke their setup scripts individually. Is there a standard way to deal with this issue? To recap: I have some code that depends on other modules: should the other module's setup code go in the main setup.py, or is there a way to have my code's setup.py invoke their setup.py files?

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  • built-in schema datatype for html / xhtml

    - by John Clements
    Is there a built-in schema datatype for xhtml data? Suppose I want to specify a "boozle" element that contains two "woozles", each of which is arbitrary xhtml. I want to write something like this, using the relax NG compact syntax: namespace nifty = "http://brinckerhoff.org/nifty/" start = element nifty:boozle {woozle, woozle} woozle = element nifty:woozle {xhtml} Unfortunately, xmllint then signals this error: ./lab.rng:43: element ref: Relax-NG parser error : Reference xhtml has no matching definition ./lab.rng:43: element ref: Relax-NG parser error : Internal found no define for ref xhtml So my question is this: is there something sensible that I should put in place of "xhtml" above?

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  • Discrete and Continuous Classifier on Sparse Data

    - by Chris S
    I'm trying to classify an example, which contains discrete and continuous features. Also, the example represents sparse data, so even though the system may have been trained on 100 features, the example may only have 12. What would be the best classifier algorithm to use to accomplish this? I've been looking at Bayes, Maxent, Decision Tree, and KNN, but I'm not sure any fit the bill exactly. The biggest sticking point I've found is that most implementations don't support sparse data sets and both discrete and continuous features. Can anyone recommend an algorithm and implementation (preferably in Python) that fits these criteria? Libraries I've looked at so far include: Orange (Mostly academic. Implementations not terribly efficient or practical.) NLTK (Also academic, although has a good Maxent implementation, but doesn't handle continuous features.) Weka (Still researching this. Seems to support a broad range of algorithms, but has poor documentation, so it's unclear what each implementation supports.)

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  • Confusion on using django socialauth

    - by Fedor
    http://github.com/uswaretech/Django-Socialauth/tree/master/socialauth/ I'm a bit confused on how I should use this. Of course, I read the notes at the bottom but I'm a Django novice so I'll need a little hand holding. The structure of this looks like a project structure since it contains a urls.py but I'm also aware that applications can also have that. It also has a manage.py which leads me to believe it's a project ( plus the subdirectories ). So should I just be integrating portions of this into my existing project? This isn't an application, right? The README also mentions grabbing API Keys. So if I want a standard interface where you click on a google/yahoo logo and it forwards itself via Javascript to the authentication page where you login if you already aren't logged in, kicks you back to your own page, would I need API keys? Any other special tips are appreciated.

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  • What does !! (double exclamation point) mean?

    - by molecules
    In the code below, from a blog post by Alias, I noticed the use of the double exclamation point !!. I was wondering what it meant and where I could go in the future to find explanations for Perl syntax like this. (Yes, I already searched for '!!' at perlsyn). package Foo; use vars qw{$DEBUG}; BEGIN { $DEBUG = 0 unless defined $DEBUG; } use constant DEBUG => !! $DEBUG; sub foo { debug('In sub foo') if DEBUG; ... } UPDATE Thanks for all of your answers. Here is something else I just found that is related The List Squash Operator x!!

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  • error: gnome.h: No such file or directory

    - by michael
    I would like to resolve this 'error: gnome.h: No such file or directory ' on ubuntu. I get this error: /bin/sh: gnome-config: not found In file included from TestMDI.cpp:18: ../../../../dist/include/system_wrappers/gnome.h:3:24: error: gnome.h: No such file or directory From this: http://ubuntuforums.org/showthread.php?t=295105 I tried: $ sudo apt-get install libgnomeui-dev Reading package lists... Done Building dependency tree Reading state information... Done libgnomeui-dev is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 21 not upgraded. But that still does not resolve my problem. Any idea how to fix it?

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  • Which revision of html5lib is stable?

    - by Mat
    html5lib notes that it's latest release (0.11) is somewhat old. Using the Python portion, I have recursion problems as noted in Issue 70 and Issue 59 but can't find a recent Mercurial revision that is stable. The latest tip is no good, I got the following error from python setup.py install: byte-compiling build/bdist.linux-x86_64/egg/html5lib/treewalkers/_base.py to _base.pyc File "build/bdist.linux-x86_64/egg/html5lib/treewalkers/_base.py", line 40 "data": []} ^ SyntaxError: invalid syntax And I get the following errors at runtime: soup = parser.parse(page.read()) File "build/bdist.linux-x86_64/egg/html5lib/html5parser.py", line 165, in parse File "build/bdist.linux-x86_64/egg/html5lib/html5parser.py", line 144, in _parse File "build/bdist.linux-x86_64/egg/html5lib/html5parser.py", line 454, in processDoctype TypeError: insertDoctype() takes exactly 4 arguments (2 given) I'm using it on Python 2.5.2 with lxml and BeautifulSoup.

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  • Trying to drop all tables from my schema with no rows?

    - by Vineet
    I am trying to drop all tables in schema with no rows,but when i am executing this code i am getting an error THis is the code: create or replace procedure tester IS v_count NUMBER; CURSOR emp_cur IS select table_name from user_tables; BEGIN FOR emp_rec_cur IN emp_cur LOOP EXECUTE IMMEDIATE 'select count(*) from '|| emp_rec_cur.table_name INTO v_count ; IF v_count =0 THEN EXECUTE IMMEDIATE 'DROP TABLE '|| emp_rec_cur.table_name; END IF; END LOOP; END tester; ERROR at line 1: ORA-29913: error in executing ODCIEXTTABLEOPEN callout ORA-29400: data cartridge error KUP-00554: error encountered while parsing access parameters KUP-01005: syntax error: found "identifier": expecting one of: "badfile, byteordermark, characterset, data, delimited, discardfile, exit, fields, fixed, load, logfile, nodiscardfile, nobadfile, nologfile, date_cache, processing, readsize, string, skip, variable" KUP-01008: the bad identifier was: DELIMETED KUP-01007: at line 1 column 9 ORA-06512: at "SYS.ORACLE_LOADER", line 14 ORA-06512: at line 1 ORA-06512: at "SCOTT.TESTER", line 9 ORA-06512: at line 1

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  • Force compile-time linking of all classes in a SWC

    - by aaaidan
    Using Flash CS4, I am making a game that has a dozen or so sounds and a couple of music tracks. To cut down on publish/compile time, I have moved the sounds and music into an (external) SWC, which is located in a "Library Path" for the project. This works, but with a caveat... Until before I externalised the assets, I had been dynamically instantiating the Sound objects of the embedded sound by getting their classes with getDefinitionByName. // something like... var soundSubClass:Class = Class(getDefinitionByName(soundClassName)); var mySound:Sound = new soundSubClass(); But now that they're located in an external SWC, I need to have "concrete" references to the classes in order to load them like this, otherwise they are not included in the published SWF, and there is a runtime error when getDefinitionByName tries to get a class that doesn't exist. So, my question: in Flash Professional CS4, is there any way to force a library's assets to be included, regardless of whether they are statically linked? FlashDevelop has a compiler option "SWC Include Libraries", which is exactly what I want, and is distinct from the "SWC Libraries" option. The description of the "SWC Include Libraries" option is "Links all classes inside a SWC file to the resulting application SWF file, regardless of whether or not they are used." (Also, it's important to me that all the assets are contained within the one compiled SWF. Linking at runtime isn't what I'm after.)

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  • More pythonic way to iterate

    - by fmark
    I am using a module that is part of a commercial software API. The good news is there is a python module - the bad news is that its pretty unpythonic. To iterate over rows, the follwoing syntax is used: cursor = gp.getcursor(table) row = cursor.Next() while row: #do something with row row = cursor.next() What is the most pythonic way to deal with this situation? I have considered creating a first class function/generator and wrapping calls to a for loop in it: def cursor_iterator(cursor): row = cursor.Next() while row: yield row row = cursor.next() [...] cursor = gp.getcursor(table) for row in cursor_iterator(cursor): # do something with row This is an improvement, but feels a little clumsy. Is there a more pythonic approach? Should I create a wrapper class around the table type?

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  • Most common C# bitwise operations

    - by steffenj
    For the life of me, I can't remember how to set, delete, toggle or test a bit in a bitfield. Either I'm unsure or I mix them up because I rarely need these. So a "bit-cheat-sheet" would be nice to have. For example: flags = flags | FlagsEnum.Bit4; // Set bit 4. or if ((flags == FlagsEnum.Bit4)) == FlagsEnum.Bit4) // Is there a less verbose way? Can you give examples of all the other common operations, preferably in C# syntax using a [Flags] enum?

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  • MySQL Stored Procedure: Boolean Logic in IF THEN

    - by xncroft
    I'm looking for the proper syntax (if this is possible in MySQL stored procedures) for using logical operators in an IF THEN statement. Here's something along the lines of what I would like to do, but I'm not certain if I should type "OR" or "||" in the IF ... THEN clause: DELIMITER $$ CREATE PROCEDURE `MyStoredProc` (_id INT) BEGIN DECLARE testVal1 INT DEFAULT 0; DECLARE testVal2 INT DEFAULT 0; SELECT value1, value2 INTO testVal1, testVal2 FROM ValueTable WHERE id = _id; IF testVal1 > 0 OR testVal2 > 0 THEN UPDATE ValueTable SET value1 = (value1+1) WHERE id=_id; END IF; END$$

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  • Overriding as_json has no effect?

    - by Ola Tuvesson
    I'm trying to override as_json in one of my models, partly to include data from another model, partly to strip out some unnecessary fields. From what I've read this is the preferred approach in Rails 3. To keep it simple, let's say I've got something like: class Country < ActiveRecord::Base def as_json(options={}) super( :only => [:id,:name] ) end end and in my controller simply def show respond_to do |format| format.json { render :json => @country } end end Yet whatever i try, the output always contains the full data, the fields are not filtered by the ":only" clause. Basically, my override doesn't seem to kick in, though if I change it to, say... class Country < ActiveRecord::Base def as_json(options={}) {foo: "bar"} end end ...I do indeed get the expected JSON output. Have I simply got the syntax wrong?

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  • python: iif or (x ? a : b)

    - by Albert
    If Python would support the (x ? a : b) syntax from C/C++, I would write: print paid ? ("paid: " + str(paid) + " €") : "not paid" I really don't want to have an if-check and two independent prints here (because that is only an example above, in my code, it looks much more complicated and would really be stupid to have almost the same code twice). However, Python does not support this operator or any similar operator (afaik). What is the easiest/cleanest/most common way to do this? I have searched a bit and seen someone defining an iif(cond,iftrue,iffalse) function, inspired from Visual Basic. I wondered if I really have to add that code and if/why there is no such basic function in the standard library.

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  • Problem wit MDAC when trying to compile in VS2008 using x64 bit target platform

    - by grobartn
    I am trying to compile an 32 bit application. I am aware of problems with it but that is why its being compiled on 64 bit version. I am hanging at this problem. Application uses lots of sql stuff. In sqltypes.h file: (provided by MDAC) #ifdef _WIN64 typedef INT64 SQLLEN; typedef UINT64 SQLULEN; typedef UINT64 SQLSETPOSIROW; #else For some reason when its compiled on 32 bit platform it works great But when I try building it on 64 it goes berserk. Error 61 error C2146: syntax error : missing ';' before identifier 'SQLLEN' ..\external\microsoft sdk\include\sqltypes.h 50 It does not recognize INT64, UINT64. Is there something I need to enable so it will work under 64 build process? Missing some #include or #define? Any help would be great Thanks

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  • jsTree causes that links on whole page are broken

    - by niao
    Greetings, I have the following problem. In my asp.net mvc page (which is a partial view) I create an instance of jsTree as follows: <script type="text/javascript"> $(function() { $("#industries").tree({ callback: { onselect: function(NODE, TREE_OBJ) { $("#SelectedIndustryROWGUID").val($(NODE).attr("id")); $("#resultMessage").append($(NODE).attr("rel")); } }, data: { type: "json", async: true, opts: { method: "GET", url: "/CreateMessage/GetIndustries/" } } }); }); this works fine but then, when I click on any link on the page, it does not work. The links are executed when I choose "open in new tab" option from context menu. Can someone please help me with this?

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  • LIKE operator with $variable

    - by skarama
    This is my first question here and I hope it is simple enough to get a quick answer! Basically, I have the following code: $variable = curPageURL(); $query = 'SELECT * FROM `tablename` WHERE `columnname` LIKE '$variable' ; If I echo the $variable, it prints the current page's url( which is a javascript on my page) Ultimately, what I want, is to be able to make a search for which the search-term is the current page's url, with wildcards before and after. I am not sure if this is possible at all, or if I simply have a syntax error, because I get no errors, simply no result! I tried : $query = 'SELECT * FROM `tablename` WHERE `columnname` LIKE '"echo $variable" ' ; But again, I'm probably missing or using a misplaced ' " ; etc. Please tell me what I'm doing wrong!

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  • Eclipse and Actionscript 3

    - by teapot7
    Does anyone know of any good solutions (Eclipse plugins presumably) for using Eclipse to develop in ActionScript 3? There are a number of solutions for developing with ActionScript 2, leveraging MTASC, Swfmill and other open source tools, but I'm specifically looking for AS3 support. It's simple enough to use Eclipse as an editor, and a place from which to invoke Ant scripts to compile with the Adobe command line tools, but I'm looking for syntax colouring, autocompletion, refactoring, debugging - all the modern IDE luxuries. Other tool I've used: FlashDevelop: free and good, but Windows only and doesn't have refactoring. Nevertheless a nice piece of work. IntelliJ Idea: very nice ActionScript 3 support, though not quite as slick as their Java support. Unfortunately AS3 is not supported in the free/community edition of Idea and I'm not ready to purchase the full version as yet.

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  • Access 2003 - Embedded ppt slide or Excel Spreadsheet in a form, how do I communicate?

    - by Justin
    So if I was to take a an access form, and embed either an excel spreadsheet into it, or a powerpoint slide/pres, how would I reference it in VBA code? So I know I have to set the libraries, name the frame of the OLE object, and use applicable syntax to whatever I want to do, with whatever I stick in the form, however the only things I have ever done with excel and/or powerpoint is automate the opening of a seperate window/application from access, not within the access form....so I am not sure?? if I said its a new Excel.Application, then set xls = to (the ss in the file, and not some file path of another excel file somewhere)? does that make sense?

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  • Flex Button CSS skinning

    - by dta
    I have a CSS file containing the following definition : .Tab{ up-skin:Embed(skinClass='XUpSkin'); over-skin:Embed(skinClass='XOverSkin'); disabled-skin:Embed(skinClass='XDisabledSkin'); } And a Flex file : <mx:Button id="b1" style="Tab"/> Now, I want to use the disabled-skin defined in the CSS, as the upSkin of b1. So something like b1.setStyle("upSkin","Tab.disabled-skin"); But I am struggling with the exact syntax of the second argument for setStyle. What should I use for the second argument for setStyle method?

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  • Creating an AST node in Erlang

    - by dagda1
    Hi, I am playing about with Erlang and I am trying to write a simple arithmetic parser. I want to try and parse the following expression: ((12+3)-4) I want to parse the expression into a stack of AST nodes. When parsing this expression, I would first of all create a binary expression for the (12+3) expression which would look something like this in C#: var binaryStructure = new BinaryStructure(); binaryStructure.Left = IntegerLiteralExpression(12); binaryStructure.Right = IntegerLiteralExpression(4); binaryStructure.Operator = binaryExpression.Operator != BinaryOperatorType.Addition; I am quite new to Erlang and I am wondering how I would go about creating a structure like this in Erlang that I can place on a List that I would use as the stack of expressions. Can anyone suggest how to create such a tree like structure? Would a function be a good fit? Thanks Paul

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  • how to word wrap a QTreeWidgetItem

    - by japs
    hello all, i have to populate a QTreeWidget with items (or children of items) that may happen to be too long to fit in a single line, so i'm looking for a way to word wrap them. i thought myQTreeWidget.setWordWrap(True) (done via QtDesigner4) would have done the job, but that doesn't seem to be the case. i don't konw if it is relevant, but the tree is enveloped in a splitter frame, so the wrapping should be somehow dynamic to allow resizing of the splitter. Any ideas? I use PyQt4, but hints in any language/binding would be much appreciated. have a good day all.

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  • How can I improve this design?

    - by klausbyskov
    Let's assume that our system can perform actions, and that an action requires some parameters to do its work. I have defined the following base class for all actions (simplified for your reading pleasure): public abstract class BaseBusinessAction<TActionParameters> : where TActionParameters : IActionParameters { protected BaseBusinessAction(TActionParameters actionParameters) { if (actionParameters == null) throw new ArgumentNullException("actionParameters"); this.Parameters = actionParameters; if (!ParametersAreValid()) throw new ArgumentException("Valid parameters must be supplied", "actionParameters"); } protected TActionParameters Parameters { get; private set; } protected abstract bool ParametersAreValid(); public void CommonMethod() { ... } } Only a concrete implementation of BaseBusinessAction knows how to validate that the parameters passed to it are valid, and therefore the ParametersAreValid is an abstract function. However, I want the base class constructor to enforce that the parameters passed are always valid, so I've added a call to ParametersAreValid to the constructor and I throw an exception when the function returns false. So far so good, right? Well, no. Code analysis is telling me to "not call overridable methods in constructors" which actually makes a lot of sense because when the base class's constructor is called the child class's constructor has not yet been called, and therefore the ParametersAreValid method may not have access to some critical member variable that the child class's constructor would set. So the question is this: How do I improve this design? Do I add a Func<bool, TActionParameters> parameter to the base class constructor? If I did: public class MyAction<MyParameters> { public MyAction(MyParameters actionParameters, bool something) : base(actionParameters, ValidateIt) { this.something = something; } private bool something; public static bool ValidateIt() { return something; } } This would work because ValidateIt is static, but I don't know... Is there a better way? Comments are very welcome.

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  • Java Array Comparison

    - by BlairHippo
    Working within Java, let's say I have two objects that, thanks to obj.getClass().isArray(), I know are both arrays. Let's further say that I want to compare those two arrays to each other -- possibly by using Arrays.equals. Is there a graceful way to do this without resorting to a big exhaustive if/else tree to figure out which flavor of Arrays.equals needs to be used? I'm looking for something that's less of an eyesore than this: if (obj1 instanceof byte[] && obj2 instanceof byte[]) { return Arrays.equals((byte[])obj1, (byte[])obj2); } else if (obj1 instanceof boolean[] && obj2 instanceof boolean[]) { ...

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