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  • Problem with returning values from a helper method in Rails

    - by True Soft
    I want to print some objects in a table having 2 rows per object, like this: <tr class="title"> <td>Name</td><td>Price</td> </tr> <tr class="content"> <td>Content</td><td>123</td> </tr> I wrote a helper method in products_helper.rb, based on the answer of this question. def write_products(products) products.map { |product| content_tag :tr, :class => "title" do content_tag :td do link_to h(product.name), product, :title=>product.name end content_tag :td do product.price end end content_tag :tr, :class => "content" do content_tag :td, h(product.content) content_tag :td, product.count end }.join end But this does not work as expected. It only returns the last node - the last <td>123</td> What should I do to make it work?

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  • Are fluid websites worth making anymore?

    - by Adam
    Hey guys, I'm making a website now and I am trying to decide if I should make it fluid or not. Fixed width websites are much easier to make and also much easier to make them appear consistent. To be honest though, I personally prefer looking at fluid websites that stretch to the full width of my monitor. My question comes from the fact that in most modern browsers you can hold control and scroll your mouse wheel to basically resize any website. So is creating a fluid website worth the trouble?

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  • Method not returning string value c# <List>

    - by Santii20
    public List<string> Test_IsDataLoaded() { try { if (GRIDTest.Rows.Count != 0) { int countvalue = GRIDTest.Rows.Count; GRIDTest.Rows[0].WaitForControlReady(); List<string> ReleaseIDList = new List<string>(); int nCellCount = GRIDTest.Cells.Count; for(int nCount = 0;nCount<nCellCount ;nCount++) { if(nCount %5==0) ReleaseIDList.Add((GRIDTest.Cells[0].GetProperty("Value").ToString())); } return ReleaseIDList; } } catch (Exception) { } } Method throws me error = Not all code path return a value. Whats wrong in code.

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  • this.optional() in jQuery validation method doesn't seem to work

    - by HiveHicks
    Hello, I've got a little problem here. I've got the following rule for one of my fields: StartDate: { required: isDelayed, dateRU: true } isDelayed() returns false, so I guess StartDate field should be optional. However if I check it inside my dateRU method: $.validator.addMethod( "dateRU", function(value, element) { return this.optional(element) || isValidDate($.trim(value)); }, "Date is incorrect" ); this.optional(element) always returns false for StartDate. I can't figure out what's wrong. Any ideas? UPD. Does optional() returns true only if element is not required AND IS EMPTY? 'Cause that may be my problem.

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  • compiler warning on (ambiguous) method resolution with named parameters

    - by FireSnake
    One question regarding whether the following code should yield a compiler warning or not (it doesn't). It declares two methods of the same name/return type, one has an additional named/optional parameter with default value. NOTE: technically the resolution isn't ambiguous, because the rules clearly state that the first method will get called. See here, Overload resolution, third bullet point. This behavior is also intuitive to me, no question. public void Foo(int arg) { ... } public void Foo(int arg, bool bar = true) { ...} Foo(42); // shouldn't this give a compiler warning? I think a compiler warning would be kind of intuitive here. Though the code technically is clean (whether it is a sound design is a different question:)).

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  • Ideas for a C/C++ library

    - by Mohit Deshpande
    I thought one of the best ways to familiarise myself with C/C++, is to make a helpful library. I was maybe thinking like a geometry library, like to calculate areas, surface area, etc. It would be useful in game programming. Or maybe an algebra library, like for different formulas like the distance formula, quadratic formula, etc. Or maybe like a standard library for very simple functions, like calculating the number of items in an array.

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  • Definitive method for sizing font in css

    - by David
    Hi there, I would like to know some opinions from experienced developers on what they think the definitive way to size fonts (in a base sense). I know that working with ems is considered best but im referring to the best way to set the base font size. There is the technique of setting font to 10px using 62.5 method but i think ie has an issue with rounding which throws this out slightly (perhaps not) YUI framework uses body { font:13px/1.231 arial,helvetica,clean,sans-serif; /* for IE6/7 */ *font-size:small; /* for IE Quirks Mode */ *font:x-small; } which really confuses me! Tripoli uses html { font-size:125%; } body { font-size:50%; } a list apart suggest something along the lines of : body { font-size: 16px; *font-size: 100%; } So which is the best either out of these methods or any alternatives. The best being the easiest to work with and the most reliable cross browser.

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  • Using jep.invoke() method

    - by hofsoc
    Hi, I need to call a function from a python script and pass in parameters into it. I have a test python script which I can call and run from java using Jepp - this then adds the person. Eg Test.py import Finding from Finding import * f = Finding() f.addFinding("John", "Doe", 27) Within my Finding class I have addFinding(firstname, lastName, age) However, I wish to be able to do this from within java. Should I be using the jep.invoke() method. Does anyone have a hello world example of such a thing being done or forward me to some good examples? Does anyone have any suggestions please? Thanks in advance

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  • validate constructor arguments or method parameters with annotations, and let them throw an exceptio

    - by marius
    I am validating constructor and method arguments, as I want to the software, especially the model part of it, to fail fast. As a result, constructor code often looks like this public MyModelClass(String arg1, String arg2, OtherModelClass otherModelInstance) { if(arg1 == null) { throw new IllegalArgumentsException("arg1 must not be null"); } // further validation of constraints... // actual constructor code... } Is there a way to do that with an annotation driven approach? Something like: public MyModelClass(@NotNull(raise=IllegalArgumentException.class, message="arg1 must not be null") String arg1, @NotNull(raise=IllegalArgumentException.class) String arg2, OtherModelClass otherModelInstance) { // actual constructor code... } In my eyes this would make the actual code a lot more readable. In understand that there are annotations in order to support IDE validation (like the existing @NotNull annotation). Thank you very much for your help.

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  • Error in IE8 Browser -> Message: Object doesn't support this property or method

    - by tibin mathew
    Hi All, In my joomla project(http://crystalwrightlive.com) home page there is one sliding banner section, but this banner not working in IE browser (working fine in FF browser) and showing following error: Webpage error details User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; GTB6; InfoPath.2) Timestamp: Sat, 8 May 2010 06:42:15 UTC Message: Object doesn't support this property or method Line: 1 Char: 1 Code: 0 URI: http://crystalwrightlive.com/index.php In index page included a jquery file: http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js when i removed this JS file, no error but this JQuery file needed for this sliding banner. How can i fix this issue, Please anyone help me!!!!

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  • iPhone noob - different method types?

    - by codemonkey
    My apologies in advance for what is probably a really dumb question. I'm familiar (or at least getting familiar) with instance and class methods in objective-c, but have also seen method implementations that look like this: #import "Utilities.h" #import "CHAPPAppDelegate.h" #import "AppState.h" @implementation Utilities CHAPPAppDelegate* GetAppDelegate() { return (CHAPPAppDelegate *)[UIApplication sharedApplication].delegate; } AppState* GetAppState() { return [GetAppDelegate() appState]; } @end What are these? While I'm sure this is documented somewhere, I don't know what term to use in searching for an explanation of what's being done here. I like the syntax methods like this let me use when calling them, but I'm not sure exactly what I'm doing, what the implications are, how to send parameters to these types of functions, etc? To clarify how I ended up in this position, I started using these methods in a "utilities" class of mine after reading some online blog describing the author's preference for declaring these functions this way. Now I can't seem to track down a more detailed explanation of what exactly the differences are, etc.

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  • Python metaclass to run a class method automatically on derived class

    - by Barry Steyn
    I want to automatically run a class method defined in a base class on any derived class during the creation of the class. For instance: class Base(object): @classmethod def runme(): print "I am being run" def __metclass__(cls,parents,attributes): clsObj = type(cls,parents,attributes) clsObj.runme() return clsObj class Derived(Base): pass: What happens here is that when Base is created, ''runme()'' will fire. But nothing happens when Derived is created. The question is: How can I make ''runme()'' also fire when creating Derived. This is what I have thought so far: If I explicitly set Derived's metclass to Base's, it will work. But I don't want that to happen. I basically want Derived to use the Base's metaclass without me having to explicitly set it so.

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  • Discover NullPointerException bugs using FindBug

    - by alex2k8
    When I run FindBug on this code, it reports NO issues. boolean _closed = false; public void m1(@Nullable String text) { if(_closed) return; System.out.println(text.toLowerCase()); } While here it finds issue as expected: public void m1(@Nullable String text) { System.out.println(text.toLowerCase()); // FireBug: text must be nonnull but is marked as nullable } Why does it fail in first case?

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  • a reddit-php-sdk method not outputting anything

    - by diggpthoo
    I'm trying to learn reddit code and using this https://github.com/jcleblanc/reddit-php-sdk There's a method in this library $reddit->getUser() which outputs null always. Everything else seems to be working though. include_once("jcleblanc-reddit-php-sdk-4a4cc32/reddit.php"); $reddit = new reddit("my-username", "my-password"); $userData = $reddit->getUser(); var_dump($userData); outputs null. $response = $reddit->getListing("all", 5); var_dump($response); outputs what's expected just fine. Then what could be going wrong with $reddit->getUser()?

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  • Tool to detect use/abuse of String.Concat (where StringBuilder should be used)

    - by Mark Rushakoff
    It's common knowledge that you shouldn't use a StringBuilder in place of a small number of concatenations: string s = "Hello"; if (greetingWorld) { s += " World"; } s += "!"; However, in loops of a significant size, StringBuilder is the obvious choice: string s = ""; foreach (var i in Enumerable.Range(1,5000)) { s += i.ToString(); } Console.WriteLine(s); Is there a tool that I can run on either raw C# source or a compiled assembly to identify where in the source code that String.Concat is being called? (If you're not familiar, s += "foo" is mapped to String.Concat in the IL output.) Obviously, I can't realistically search through an entire project and evaluate every += to identify whether the lvalue is a string. Ideally, it would only point out calls inside a for/foreach loop, but I would even put up with all the false positives of noting every String.Concat. Also, I'm aware that there are some refactoring tools that will automatically refactor my code to use StringBuilder, but I am only interested in identifying the Concat usage at this point. I routinely run Gendarme and FxCop on my code, and neither of those tools identify what I've described.

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  • Method of getting text on a windows form ( unmanaged C++ project )

    - by Donovan
    I'm in the process of learning C++. I've created a boilerplate Win32 app within VC++ 2008. I've studied through the code and am ready do do a bit of experimenting. I thought it would be cool to print all the windows messages received in the message loop to the form created via the boilerplate code. I for the life of me, can't figure out the method of getting text onto that form. I can't seem to identify and named object that I can use to reference that damn form. The best I can figure is I need to use the handle to reference the form somehow. Still, even if I did know how to reference the form, I'm not sure I know how I would create a label to display the text. Anyway, if someone could just point out what methodology I need to learn to make this happen it would be much appreciated. Thanks, Donovan

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  • Gimpel's PC-lint and Flexelint; Anyone used them?

    - by samoz
    So I've read a few magazine articles and the website for Gimpel's PC-lint and Flexelint C/C++ compiler. It's really expensive (at least for me), but it seems like it might have some merit to warrant the cost. So I'm wondering if anyone else has used/bought them and can provide their opinions?

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  • Add a listener inside or outside get method

    - by James P.
    I'm learning Swing and have composed an interface using a series of get methods to add components. Is it a good practise to add a Listener inside a get method as follows? I'd like to make things as decoupled as possible. private JButton getConnectButton() { if (connectButton == null) { connectButton = new JButton(); connectButton.setText("Connect"); connectButton.setSize(new Dimension(81, 16)); connectButton.setLocation(new Point(410, 5)); connectButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { // actionPerformed code goes here } }); } return connectButton; }

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  • how to overwrite rcov method with loading custom file

    - by kdoya
    I use rcov 0.9.8 on ruby 1.9.1 and rvm for ROR application. Rcov has problem on ruby 1.9. I found solution for encoding problems from here. --- lib/rcov/code_coverage_analyzer.rb~ 2010-03-21 16:15:47.000000000 +0100 +++ lib/rcov/code_coverage_analyzer.rb 2010-03-21 16:11:49.000000000 +0100 @@ -250,6 +250,10 @@ end def update_script_lines__ + if '1.9'.respond_to?(:force_encoding) + SCRIPT_LINES__.each{|k,v| v.each{|src| src.try(:force_encoding, 'utf-8')}} + end + @script_lines__ = @script_lines__.merge(SCRIPT_LINES__) end But I want to overwrite method with loading custom file. Rcov does not have require option. Any ideas?

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  • Disable link with the prototype observe method...

    - by enyo
    I want to create a link like this: <a href="http://example.com">text</a> and replace the behavior so that the link downloads the content with Ajax instead when clicking. It is important for me not to replace the href attribute (so copying the link still works). One solution would be to do: $('link').onclick = function() { return false; }; but I would like to use the .observe method. But this doesn't work: $('link').observe('click', function() { return false; }); (which is quite logical). Any ideas on how I could achieve this? Thanks.

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  • Must a Language that Implements Monads be Statically Typed?

    - by Morgan Cheng
    I am learning functional programming style. From this link http://channel9.msdn.com/shows/Going+Deep/Brian-Beckman-Dont-fear-the-Monads/, Brian Beckman gave a brilliant introduction about Monad. He mentioned that Monad is about composition of functions so as to address complexity. A Monad includes a unit function that transfers type T to an amplified type M(T); and a Bind function that, given function from T to M(U), transforms type M(T) to another type M(U). (U can be T, but is not necessarily). In my understanding, the language implementing monad should be type-checked statically. Otherwise, type errors cannot be found during compilation and "Complexity" is not controlled. Is my understanding correct?

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  • Using the .where method in Rails3

    - by Elliot
    Hey Guys, I've just started using the .where method, and I'm a little bit confused about how to fully utilize it. I'd like to do something like: @books = Book.where(:author_id => 1 || 2) clearly I know that doesn't work, but I'm trying to demonstrate that I want some extra logic here. some "or" "and" "does not equal" etc. Any ideas for where I can research this? I was looking in the rails API but I didnt see anything that was that helpful. Thanks!

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  • Displaying the error message from web service in jquery validation custom method

    - by Mrt
    Hello, I'm adding a custom method to jquery validation that calls a webservice, but the web service returns more then just a boolean. Is it possible to show the error based on return call of the web service. e.g. say I want an email address to be valid & not in use, so my web service checks this an returns 0 - ok, 1 - not valid, 2 - in use. How can I get jquery to show to correct error message based in the response ?

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