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  • Extracting a Rails application into a plugin or engine

    - by Globalkeith
    I have a Rails 2.3 application which I would like to extract into a plugin, or engine. The application has user authentication, and basic cms capabilities supported by ancestry plugin. I want to extract the logic for the application into a plugin/engine so that I can use this code for future projects, with a different "skin" or "theme" if required. I'm not entirely sure I actually understand the difference between plugin and engine concepts, so that would be a good first point. What is the best approach, are there any good starting points, links, explanations, examples that I should follow. Also, with the release of R3 to consider, is there anything that I should be aware of for that, with regards to plugins etc. I am going to start off by watching Ryan's http://railscasts.com/episodes/149-rails-engines but obviously thats over a year old now, so one of the challenges I'm faced with is finding the most up to date and relevant information on this subject. All tips and help gratefully received.

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  • Learning how to program real things.

    - by Sean
    How would you guys recommend I actually learn to program real things? I mean, I know how to do basic academic things. I can implement a templated stack/queue/map/etc. data structure in C++ or Java or whatever. I can make a text-based hangman game or whatever. Etc etc. But how can I learn to program something real, something useful? I've done project Euler up to question 100 or so, and I feel like that's given me more mathematical maturity but not programming maturity. Should I buy a book and follow exercises, struggle through interesting projects, etc, ? In short, how did you guys transition from academic exercises to real, fun and/or useful programs?

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  • Strategies for generating Zend Cache Keys

    - by emeraldjava
    ATM i'm manually generating a cache key based on the method name and parameters, then follow to the normal cache pattern. This is all done in the Controller and i'm calling a model class that 'extends Zend_Db_Table_Abstract'. public function indexAction() { $cache = Zend_Registry::get('cache'); $individualleaguekey = sprintf("getIndividualLeague_%d_%s",$leagueid,$division->code); if(!$leaguetable = $cache->load($individualleaguekey)) { $table = new Model_DbTable_Raceresult(); $leaguetable = $table->getIndividualLeague($leagueid,$division,$races); $cache->save($leaguetable, $individualleaguekey); } $this->view->leaguetable = $leaguetable; .... I want to avoid the duplication of parameters to the cache creation method and also to the model method, so i'm thinking of moving the caching logic away from my controller class and into model class packaged in './model/DbTable', but this seems incorrect since the DB model should only handle SQL operations. Any suggestions on how i can implement a clean patterned solution?

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  • OpenGL ES displaying HUD display Text can't be colored black on top of textured 3D objects

    - by ivanceras
    This is a follow-up of this question on here http://iphonedevelopment.blogspot.com/2010/02/drawing-hud-display-in-opengl-es.html It tackles on the HUD (heads up display) which is based on this tutorial http://stackoverflow.com/questions/2681102/opengl-es-displaying-hud-display-has-no-color-on-top-of-textured-3d-objects I wanted to set the "Text" in color BLACK, but it is more complicated than what I thought. Setting it to some other color other than black "glColor4f(0.0, 0.0, 0.0, 1.0);" is just fine. I assume that the culprit must be in the Blending function "glBlendFunc (GL_ONE, GL_ONE);" I experimented a lot of combinations with no luck. Has anyone experimented on this one on top of textured 3D in the backgrounds working?

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  • how to replace multi string with a array node in js

    - by Rueta
    hi everyone! i here a Work and i don't know how to do it. i have a string here: <div class="demotext"> <p>this is demo string i demo want to demo use</p> </div> i create the array variable for demo: var demoarray = new array('a','b','c'); now i want replace 'demo' in string by array node, follow 'demo' one change to 'a' , 'demo' two change to 'b'....

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  • C# - Moving a control to the mouse's position

    - by APShredder
    Hello everybody. I am trying to get a control to follow the cursor when the user clicks and drag the control. The problem is that 1.) the control doesn't go to the mouse's position, and 2.) the control flickers and flies all over the place. I've tried a few different methods of doing this, but all so far have failed. I've tried: protected override void OnMouseDown(MouseEventArgs e) { while (e.Button == System.Windows.Forms.MouseButtons.Left) { this.Location = e.Location; } } and protected override void OnMouseMove(MouseEventArgs e) { while (e.Button == System.Windows.Forms.MouseButtons.Left) { this.Location = e.Location; } } but neither of these work. Any help is appreciated, and thanks in advance!

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  • Single-letter prefix for PHP class constants?

    - by keithjgrant
    I've noticed many (all?) PHP constants have a single-letter prefix, like E_NOTICE, T_STRING, etc. When defining a set of class constants that work in conjunction with one another, do you prefer to follow similar practice, or do you prefer to be more verbose? class Foo { // let's say 'I' means "input" or some other relevant word const I_STRING = 'string'; const I_INTEGER = 'integer'; const I_FLOAT = 'float'; } or class Bar { const INPUT_STRING = 'string'; const INPUT_INTEGER = 'integer'; const INPUT_FLOAT = 'float'; }

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  • Document Management System - Where to Store Files?

    - by Diego AC
    Hey, stack! I'm on charge of building an ASP.NET MVC Document Management System. It have to be able to do basic document management tasks like adding, editing and searching entries and also perform versioning. Anyways, I'm targeting PDF, Office and many image formats as the file attached to each document entry in the database. My question is: What design guidelines do pros follow when building the storage mechanism? Do they store the document files in the file system? Database? How file uploading is handled? I used to upload the files to a temporal location while the user was editing the data and move it to permanent storage when the user confirmed the entry creation. Is this good? Any suggestions on improvement?

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  • Poll: Require Semicolons and Forbid Tables?

    - by George Bailey
    There are a few very serious but opinionated and subjective arguments that I know of. Two of them are Whether or not to use semicolons in the event they are optional. There is a vote as here that also includes reasons Whether or not to use tables for non tabular data. There more information here Since the semicolon question arises often in JavaScript and the tables thing in HTML then there are probably many who run into both. I sort of expect a person who is strict with semicolons also to be strict about avoiding tables. I will post four CW answers here to vote on. Please vote what you think is right. If you want to talk about the reasons then please use Semicolons: Do you recommend using semicolons after every statement in JavaScript? Tables: Start your own question under the polls tag and follow the design of the semicolons question.

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  • how to manage svn repositories in xcode

    - by ratnasomu
    hellow all , i am using svn for my xcode project. now i added two files into current project and added to repository and commit changes for classes folder. But,when i am trying to commit entire project i am getting error like "Error: 155005 (Working copy not locked; this is probably a bug, please report) Description: Commit failed (details follow): Error: 155005 (Working copy not locked; this is probably a bug, please report) Description: Directory '/Users/gopalmadhu/Desktop/All My data/Schduler current code/build/Debug-iphonesimulator/scheduler.app.dSYM/.svn' containing working copy admin area is missing " due to this the classes that are already checked -in also not getting visible when i check out my code . the files are in the project but not visible.so i need to add them again from the project floder to classes folder. this is not correct way of managing the svn.. so wht can i do to solve my problem .coud anyone help me solve this. Thanks ..

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  • Content Being Echoed Below Footer in Category Post Template

    - by poindexter
    I have created a category template in Wordpress for all posts that are in the 'blog' category. The file name is single-blog.php. There is some conditional code in single.php that checks whether the post is in the 'blog' category and if it is it redirects it to single-blog.php. That seems to be working fine. The problem is that on all the individual 'blog' categorized posts the post title and content are echoed below the footer of the page. I do not know why they are showing up and I haven't been able to stop it or hide it. The Loop is getting closed on the template page, but I'm wondering if the Loop from single.php is somehow also being sent over. You can view an example of the problem here: http://69.20.59.228/2010/03/test-blog-post/ Please let me know if you have any suggestions. I am posting two sections of code below. The first is the conditional call in single.php. The second is the code from the single-blog.php (the category post template). the conditional call in single.php. <?php $post = $wp_query->post; if (in_category('blog')) { include(TEMPLATEPATH.'/single-blog.php'); }?> code from the single-blog.php (the category post template) <?php get_header(); ?> <?php get_sidebar(); ?> <p><h2>The IQNavigator Blog</h2></p> <em><a href="/category/blog">Blog Home</a></em> | <em><a href="/category/blog/feed/">Subscribe via RSS</a></em><p><br></br></p> <?php if (have_posts()) : while (have_posts()) : the_post(); ?> <div <?php post_class() ?> id="post-<?php the_ID(); ?>"> <h1 class="pagetitle"><?php the_title(); ?></h1> <!-- <p class="details">Posted <?php the_time('l, F jS, Y') ?> at <?php the_time() ?></p> --> <div class="entry"> <?php the_content('<p class="serif">Read the rest of this entry &raquo;</p>'); ?> <?php wp_link_pages(array('before' => '<p><strong>Pages:</strong> ', 'after' => '</p>', 'next_or_number' => 'number')); ?> <?php the_tags( '<p>Tags: ', ', ', '</p>'); ?> <p class="postmetadata alt"> <small> -----<br> Posted <?php /* This is commented, because it requires a little adjusting sometimes. You'll need to download this plugin, and follow the instructions: http://binarybonsai.com/wordpress/time-since/ */ /* $entry_datetime = abs(strtotime($post->post_date) - (60*120)); echo time_since($entry_datetime); echo ' ago'; */ ?> on <?php the_time('l, F jS, Y') ?>, filed under <?php the_category(', ') ?>. Follow any responses to this entry through the <?php post_comments_feed_link('RSS'); ?> feed. <?php if ( comments_open() && pings_open() ) { // Both Comments and Pings are open ?> <a href="#respond">Leave your own comment</a>, or <a href="<?php trackback_url(); ?>" rel="trackback">trackback</a> from your own site. <?php } elseif ( !comments_open() && pings_open() ) { // Only Pings are Open ?> Responses are currently closed, but you can <a href="<?php trackback_url(); ?> " rel="trackback">trackback</a> from your own site. <?php } elseif ( comments_open() && !pings_open() ) { // Comments are open, Pings are not ?> You can skip to the end and leave a response. Pinging is currently not allowed. <?php } elseif ( !comments_open() && !pings_open() ) { // Neither Comments, nor Pings are open ?> Both comments and pings are currently closed. <?php } edit_post_link('Edit this entry','','.'); ?> </small> </p> <?php the_tags( '<p>Tagged: ', ', ', '</p>'); ?> </div> </div> <?php comments_template(); ?> <?php endwhile; else: ?> <p>Sorry, no posts matched your criteria.</p> <?php endif; ?> <?php get_footer(); ?>

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  • Generating PDF's via Delayed Job while maintaing a RESTful pattern.

    - by Jeff
    Hi, currently I am running a Rails app on Heroku, and everything is working great with exception of generating PDF documents that sometimes contain thousands of records. Heroku has a built-in timeout of 30 seconds, so if the request takes more than 30 seconds, it's abandoned. That's fine, since they offer delayed_job support built-in. However, all of the PDF's i generate follow a typical restful pattern. For instance, a request to "/posts.pdf" generates a pdf (using PRAWN and PRAWNTO) and it's delivered to the browser. So my basic question is, how do I create dynamically generated PDF's with delayed_job while maintaining the basic RESTful patterns Rail's so conveniently provides. Thanks.

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  • Difficulty to start up with basic unit test (Sample from my book -- SportsStore)

    - by Richard77
    Hello, I'm really new in TDD and, actually, I'm trying to follow the sample from my book (SportsStore -- Pro ASP.NET MVC Framework/Steve Sanderson/APRESS). I'm on pages 103-105. Although there are more on this, as new to all of this, I'm concerned with the following statements. ProductsController controller = new ProductsController(repository); var result = controller.List(2); //... regarding the above statements, when I write this (as in the book), var products = result.ViewData.Model as IList<Product>; I get a compiler error "System.Web.MVC.ActionResult" does not contain a definition for ViewData ..." But, when I remove the List() from the statement, then the compiler error disapear. var result = controller.List(2);//Doesn't work var result = controller;//It works Is something wrong there? I checked Apress website for that book, but there is nothing listed as Errata or issue. So I'm really lost. Thanks for helping

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  • DTD definition error

    - by Geln Yang
    Hi, It will get a error to define a dtd as follow: <!ELEMENT line (property*)> <!ATTLIST line showType (1|?|+|*) "1" > The error: The name token is required in the enumerated type list for the "showType" attribute declaration. It seems the value can't be special characters,such as "?","+","*". To change the characters to Latin-1 characters, like "& #42;"(add a blank before '#') , get the same error. How to resolve this problem? Thanks!

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  • Generating changelogs from commit-comments - bad idea?

    - by Adam Asham
    I work for a small company (<10 developers) where we use Svn and to some extent Git. We have no release system implemented. We don't tag our applications with a release numbers so as you can imagine, we don't keep track of changes between releases very well. With this in mind I've been thinking about generating changelogs from the commit-comments. It doesn't have to be an awful idea if you implement guidelines for how to write comments. Or am I fooling myself thinking that colleagues will follow these guidelines? Most of them don't bother adding comments today but I'm hoping that will change if they become aware of how to formulate themselves and that you don't have to comment on every single commit. Or would we it be more wise to gather information from our bug/project managing software and write the changelogs manually (which unfortunately is something nobody wants to do)?

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  • What's the requests/second standard for scraping websites?

    - by feydr
    This was the closest question to my question and it wasn't really answered very well imo: http://stackoverflow.com/questions/2022030/web-scraping-etiquette I'm looking for the answer to #1: How many requests/second should you be doing to scrape? Right now I pull from a queue of links. Every site that gets scraped has it's own thread and sleeps for 1 second in between requests. I ask for gzip compression to save bandwidth. Are there standards for this? Surely all the big search engines have some set of guidelines they follow in regards to this.

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  • How does TopCoder evaluates code?

    - by Carlos
    If you are familiar with TopCoder you know that your source-code gets a final "grade/points" this depends on time, how many compiles, etc, one of the highest weighted being performance. But how can they test that, is there some sort of simple code (java or c++) to do it that you could share for me to evaluate and hopefully write my own to test the programs I write for University? This is sort of a follow up question to this one where I ask if shorter code results in best performance. P.S: Im interested in both of how topcoders knows performance and writing code to test performance.

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  • Getters and Setters: Code smell, Necessary Evil, or Can't Live Without Them [closed]

    - by Avery Payne
    Possible Duplicate: Allen Holub wrote “You should never use get/set functions”, is he correct? Is there a good, no, a very good reason, to go through all the trouble of using getters and setters for object-oriented languages? What's wrong with just using a direct reference to a property or method? Is there some kind of "semantical coverup" that people don't want to talk about in polite company? Was I just too tired and fell asleep when someone walked out and said "Thou Shalt Write Copious Amounts of Code to Obtain Getters and Setters"? Follow-up after a year: It seems to be a common occurrence with Java, less so with Python. I'm beginning to wonder if this is more of a cultural phenomena (related to the limitations of the language) rather than "sage advice". The -1 question score is complete for-the-lulz as far as I am concerned. It's interesting that there are specific questions that are downvoted, not because they are "bad questions", but rather, because they hit someone's raw nerve.

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  • Hiding/Unhiding Control in Gridview’s column - shifting problem

    - by lupital
    This is a follow up to my previous question: link text In gridview's column i have a linkbutton and a label under it. I want to hide/unhide label when linkbutton is clicked. I use javascript because i don't want any postbacks. The code: protected void gvwComments_RowDataBound(object sender, GridViewRowEventArgs e) { if (e.Row.RowType == DataControlRowType.DataRow) { LinkButton lButton = ((LinkButton)e.Row.Cells[2].FindControl("lbtnExpand")); Label label = ((Label)e.Row.Cells[2].FindControl("lblBody")); lButton.Attributes.Add("onclick", string.Format("HideLabel('{0}'); return false;", label.ClientID)); } } function HideLabel(button) { var rowObj = document.getElementById(button); if (rowObj.style.display == "none") { rowObj.style.display = "block"; } else { rowObj.style.display = "none"; } } The problem is that when I unhide the label by clicking on button, linkbutton is shifted a a bit upper it's original position in the cell. Is it possible to preserve linkbutton's position in the gridviews cell?

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  • Tortoise Check-in error Checksum mismatch

    - by coffeeaddict
    I cannot figure out why I get this error during check-in. I checked in successful only a few hours ago so not sure why now it's complaining Error: Commit failed (details follow): Error: Checksum mismatch for Error: 'C:\sss\sss\trunk\xxxx\.svn\text-base\Header.ascx.svn-base'; expected: Error: '3cee96f580409a1711a47541a07860dd', actual: 'a5fc0f8819b88bf32ab38d4c9a6b0654' Error: Try a 'Cleanup'. If that doesn't work you need to do a fresh checkout. I got latest and also performed a clean-up which said successful so not sure what else to do.

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  • How to code for Alternate Course AKA Rainy Day Scenary?

    - by janetsmith
    Alternate course is something when user doesn't do what you expected, e.g. key in wrong password, pressing back button, or database error. For any programming project, alternate course accounts for more than 50% of a project timeline. It is important. However, most computer books only focus on Basic Course (when everything goes fine). Basic course is rather simple, compared to Alternate course, because this is normally given by client. Alternate course is what we, as a programmer or Business Analyst needs to take care of. Java has some built-in mechanism (try-catch) to force us to handle those unexpected behavior. The question is, how to handle them? Any pattern to follow? Any guideline or industry practice for handling alternate course?

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  • Restoring a subversion repository to workcopy revision

    - by tinny
    My subversion VM died the other day (host hardware melted) and I had to restore a backed up copy of the vmware server image. The restore went well and the VM is running again on a new host. The problem I have is that my restored repository is at revision 60 but my working copy on my PC is at 66. When I try and commit my working copy I get the following error message. svn: Commit failed (details follow): svn: No such revision 61 What is the best way to force this commit and bring subversion up to the same revision as my working copy? Thanks

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  • How to make external Mathematica functions interruptible?

    - by Szabolcs
    I had an earlier question about integrating Mathematica with functions written in C++. This is a follow-up question: If the computation takes too long I'd like to be able to abort it using Evaluation Abort Evaluation. Which of the technologies suggested in the answers make it possible to have an interruptible C-based extension function? How can "interruptibility" be implemented on the C side? I need to make my function interruptible in a way which will corrupt neither it, nor the Mathematica kernel (i.e. it should be possible to call the function again from Mathematica after it has been interrupted)

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  • How do we know the correct moves of Tower of Hanoi?

    - by Saqib
    We know that: In case of iterative solution: Alternating between the smallest and the next-smallest disks, follow the steps for the appropriate case: For an even number of disks: make the legal move between pegs A and B make the legal move between pegs A and C make the legal move between pegs B and C repeat until complete For an odd number of disks: make the legal move between pegs A and C make the legal move between pegs A and B make the legal move between pegs B and C repeat until complete In case of recursive solution: To move n discs from peg A to peg C: move n-1 discs from A to B. This leaves disc n alone on peg A move disc n from A to C move n-1 discs from B to C so they sit on disc n Now the questions are: How did we get this two solutions? Only by intuition? Or by logical/mathematical computation? If computation, how?

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  • Why is it supposedly "hard" to deploy Ruby on Rails to production?

    - by johnny
    I admit that I don't follow much of anything "right" on deploying test versus production code. I have been using ASP.NET, and I typically run it locally in Visual Studio, it works, I upload it, I test it again on the production server. I have read several people say that deploying Rails apps is harder and there are special programs/ways on the ruby site about deploying RoR. I've only toyed with RoR. What is special about deployment? You don't just copy and paste the code and run it (from development machine to the production)? Is it because one is in Apache and the other running on the built in server? This will be on a Mac Server if it matters. Thank you for comments.

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