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  • ruby on rails adding new route

    - by ohana
    i have an RoR application Log, which similar to the book store app, my logs_controller has all default action: index, show, update, create, delete.. now i need to add new action :toCSV, i defined it in logs_controller, and add new route in the config/routes as: map.resources :logs, :collection = { :toCSV = :get }. from irb, i checked the routes and see the new routes added already: rs = ActionController::Routing::Routes puts rs.routes GET /logs/toCSV(.:format)? {:controller="logs", :action="toCSV"} then ran ‘rake routes’ command in shell, it returned: toCSV_logs GET /logs/toCSV(.:format) {:controller="logs", :action="toCSV"} everything seems working. finally in my views code, i added the following: link_to 'Export to CSV', toCSV_logs_path when access it in the brower 'http://localhost:3000/logs/toCSV', it complained: Couldn't find Log with ID=toCSV i checked in script/server, and saw this one: ActiveRecord::RecordNotFound (Couldn't find Log with ID=toCSV): app/controllers/logs_controller.rb:290:in `show' seems when i click that link, it direct it to the action 'show' instead of 'toCSV', thus it took 'toCSV' as an id...anyone know why would this happen? and to fix it? Thanks...

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  • Javascript Document.bgColor does not work

    - by Icarus
    Hi, In the below code, I get the two dialog boxes, but the bgColor of the page is never changed. Is there any standard that font / color changes are not honored in JavaScript ? <html> <head> </head> <body bgColor="GRAY"> <script type="text/javascript"> document.write("This message is written by JavaScript"); alert('Am here'); alert('Am here again'); document.bgcolor="WHITE"; </script> </body> </html>

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  • My Spinner Widgets look different on different devices. How can I define a own Spinner that looks th

    - by Janusz
    I use this code to generate a spinner in my app: subCatAdapter = new ArrayAdapter<Subcategory>(this, android.R.layout.simple_spinner_item, subCategories); subCatAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); On my device (Motorola Milestone) and in the emulator this looks like the standard gray spinner widget. On of my colleagues uses a Motorola Backflip and on his device the Spinner is black. Now its very hard to read the font in the spinner. What do I have to do to use my own view for the spinner? I don't mind to have the gray spinner on all devices, but it should always look the same on all devices.

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  • Analysis Services with excel as front end - is it possible to get the nicer UI that powerpivot provi

    - by AJM
    I have been looking into PowerPivot and concluded that for "self service BI" and ahoc buidling of cubes it has its uses. In particular I like the enhanced UI that you get from using PowerPivot rather than just using a PivotTable hooked up to an analysis services datasource. However it seems that hooking up PowerPivot to an existing analysis services cube is not a solution for "organisational BI". It is not always desireable to suck millions of rows into excel at once and the interface between PowerPivot and analysis services is very poor in my book. Hence the question is can an existing analysis services solution get the enhanced ui features that power pivot brings, withoout using powerpivot as the design tool? If powerpivot is aimed ad self service/personal BI then it seems bizare that the UI for this is better than for bigger/more costly analysis services solutions.

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  • R: ca plotting text attributes

    - by chasec
    Does anyone know of a way to control the font size/color/weight of the row and column names when plotting a correspondence plot with the ca package? The following code will produce a very nice looking chart, though if there were more attributes (very heavy, super heavy, something more than super heavy) or more classes of workers (peons, underlings, etc) then the graph will get a little cluttered and hard to tell what was what. It would be nice if you could list all the attributes in a separate color than the categories of workers. library(ca) data("smoke") plot(ca(smoke) , map = "symmetric" , what =c("active","active") , mass = c(T,T) , contrib = "absolute" , col = c("red","blue") , pch = c(15,17,15,17) , labels = c(2,2) , arrows = c(T,F) ) Alternatively, does anyone know if there is a way to reproduce something along these lines with ggplot2? I didn't find anything on the website that seemed comparable, but I don't know much about the package. Thanks, -Chase

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  • How to auto-include all headers in directory

    - by JRL
    I'm going through exercises of a C++ book. For each exercise I want to minimize the boilerplate code I have to write. I've set up my project a certain way but it doesn't seem right, and requires too many changes. Right now I have a single main.cpp file with the following: #include "e0614.h" int main() { E0614 ex; ex.solve(); } Each time I create a new class from an exercise, I have to come and modify this file to change the name of the included header as well as the class i'm instantiating. So my questions are: Can I include all headers in the directory so at least I don't have to change the #include line? Better yet, can I rewrite my solution so that I don't even have to touch main.cpp, without having one file with all the code for every exercise in it?

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  • How are deleted and renamed/moved files handled when merging a feature branch with trunk and reinteg

    - by Michael Repucci
    I've got a big-ish project that needs a lot of work on a new feature, so I planned on using a branch to do this work. I haven't had to do this before, and I just wanted to get assurance from an experienced Subversion user that things "should" work smoothly. What I'm especially concerned with is how well Subversion handles deleted, renamed/moved files between a branch and the trunk. That is, if multiple files are deleted or renamed/moved in the branch, but those files continue to be used and receive changes in the trunk, will merges with the trunk still proceed without a hitch (reworking the branch, of course, as necessary)? Also, when I then reintegrate the branch with the trunk, if the files differ greatly in name (or existence) between the trunk and branch, will the reintegration be difficult? Will the files deleted (moved) in the branch now be deleted (moved) in the trunk, or will files linger and conflicts emerge? The SVN book didn't clear up these questions for me, so your experience would be greatly appreciated. Thank you!

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  • Overriding disabled input and textarea with CSS

    - by igluratds
    Hi, Im trying to override the grey text of a disabled input and textarea. At the moment Im only really concerned with it working in Webkit and Mozilla. At the moment Im currently using every trick in the book that I know of: input[@disabled=true], input[@disabled], button[disabled]:active, button[disabled], input[type="reset"][disabled]:active, input[type="reset"][disabled], input[type="button"][disabled]:active, input[type="button"][disabled], select[disabled] > input[type="button"], select[disabled] > input[type="button"]:active, input[type="submit"][disabled]:active, input[type="submit"][disabled],input[disabled="disabled"], input[disabled] { color: black !important; } Sure it does change the colour if I change it to something else, however when I choose black it is still greyed out a bit. Any ideas? I am using Ext JS if I can use that to manipulate it. Thanks.

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  • Signature of Collections.min/max method

    - by Marco
    In Java, the Collections class contains the following method: public static <T extends Object & Comparable<? super T>> T min(Collection<? extends T> c) Its signature is well-known for its advanced use of generics, so much that it is mentioned in the Java in a Nutshell book and in the official Sun Generics Tutorial. However, I could not find a convincing answer to the following question: Why is the formal parameter of type Collection<? extends T>, rather than Collection<T>? What's the added benefit?

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  • What are some C++ Standard Library usage best practices?

    - by apphacker
    I'm learning C++ and the book I'm reading (The C++ Programming Language) says to not reinvent the wheel, to rely on the standard libraries. In C, I often end up creating a linked list, and link list iteration over and over again (maybe I'm doing that wrong not sure), so the ideas of containers available in C++, and strings, and algorithms really appeal to me. However I have read a little online, and heard some criticisms from my friends and coworkers about STL, so I thought I maybe I'd pick some brains here. What are some best practices for using STL, and what lessons have you learned about STL?

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  • css file not getting updated

    - by fusion
    the font of the content of my facebook app keeps getting italicized even when i've removed the italics from the css file. if i make minor changes in the css file and upload it to the server, the firebug shows the unedited previous css file and hence, the app keeps showing unformatted content. what exactly is going wrong here? i made a new css file and copied the contents of the previous css exactly as it was, and i linked it in all the files which require css. but when i upload these files to the server, facebook canvas doesn't show any css at all. i replaced the css filename with the previous one, and it works. why is this?

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  • Spring/EJB 3 books?

    - by Zenzen
    Ok so I'm a complete beginner when it comes to Spring and EJB and I really want to change it, the problem is I can't find any single book on Spring 3/EJB 3, everything is about 2 (for Spring/EJB) or 2.5 (for Spring). What are the differences between 2.x and 3? Should I just go with the 2.x books and then google the differences? I was thinking about getting Pro Spring 2.5 from Apress and Head First EJB (huge fan, ut from what I've heard it is rather out of date), or are there better positions?

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  • Small gaps in section headers with custom headers - iPhone / Objective-C

    - by zhar
    Hi there! Since I wanted to use the standard section header with a different font size, I just made custom section headers by using an UIImageView with the standard section header as an image. It looks fine at first, but when I scroll the table, there are small gaps below and above the section headers: Since I am not allowed to post images or more than one hyperlink yet, I will have to provide you with one link to those images: Click me! Picture: How it looks like without touching anything Picture: Dragging the table down Picture: Dragging/Scrolling the table up So as you can hopefully see, there is a small empty gap under (2nd pic) and above (3rd pic) the section header. Another thing to mention is, that the standard behaviour of non-custom section headers is, that they don't become transparent when I drag the table down (making the table offset < 0.0). Is there a way to make custom section headers mimic the same behaviour without those annoying gaps? Greetings, Zhar

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  • Java interface and abstract class issue

    - by George2
    Hello everyone, I am reading the book -- Hadoop: The Definitive Guide, http://www.amazon.com/Hadoop-Definitive-Guide-Tom-White/dp/0596521979/ref=sr_1_1?ie=UTF8&s=books&qid=1273932107&sr=8-1 In chapter 2 (Page 25), it is mentioned "The new API favors abstract class over interfaces, since these are easier to evolve. For example, you can add a method (with a default implementation) to an abstract class without breaking old implementations of the class". What does it mean (especially what means "breaking old implementations of the class")? Appreciate if anyone could show me a sample why from this perspective abstract class is better than interface? thanks in advance, George

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  • Erlang on a JVM/CLR

    - by Fortyrunner
    I've just started reading Joe Armstrongs book on Erlang and listened to his excellent talk on Software Engineering Radio. Its an interesting language/system and one whose time seems to have come around with the advent of multi-core machines. My question is: what is there to stop it being ported to the JVM or CLR? I realise that both virtual machines aren't setup to run the lightweight processes that Erlang calls for - but couldn't these be simulated by threads? Could we see a lightweight or cutdown version of Erlang on a non Erlang VM?

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  • Symfony2 : How to make the php_intl extension available for Symfony2?

    - by Miles M.
    I'm trying to follow this documentation on Symfony : http://symfony.com/doc/current/book/forms.html ok so here is my thing, I've externalised my form and created a specific form class for handling the process and being able to reuse it. So what happen when I submit the form, whatever the info are okay or not for my class, I get this fatal Error : Fatal error: Call to a member function setAttribute() on a non-object in C:\Program Files (x86)\wamp\www\QNetworks\vendor\symfony\src\Symfony\Component\Form\Extension\Core\DataTransformer\NumberToLocalizedStringTransformer.php on line 130 Call Stack I'm running with php 5.3.9 and my intl extension is installed and activated BUT when I run the app/check.php command I see : [[WARNING]] Checking that the intl extension is available: FAILED * Install and enable the intl extension (used for validators) * So I don't understand what the problem with this extension. Should I reinstall it ? When I go here : http://php.net/manual/en/intl.requirements.php I see tht i can install the PECL or the ICU library, but i don't know if I should and if there is any relation with my problem .. Thank for your help !!

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  • WPF buttons same/recommended width

    - by rwallace
    Suppose you have a window with multiple buttons such as Ok/Cancel or Yes/No/Cancel. All the buttons need to be the same width. Obviously this could be done by just guessing a number and hardwiring all of them to that number. Is there a better way to do it, one that would take into account preferred/recommended sizes (just how wide should an Ok button be anyway? This is not a rhetorical question, I actually don't know the answer!), what's needed by the text of the longest caption, what happens if the font size is increased etc?

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  • Tutorial for texture mapping a map onto an Open GL ES sphere?

    - by hotpaw2
    I'm not looking for a library or even open source code. I want to learn how to do this on my own. Where do I start to find an online tutorial, a book chapter, or other educational material for generating a polygonal model of a 3D sphere suitable for feeding to Open GL ES on an iPhone, and then mapping the polygons to some sort of 2D map data so I can texture map the sphere? Is there some sort of software tool (blenders? mayan?) with a tutorial on how to do generate this data? Where is the best place to start?

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  • Will GTK's pango and cairo work well in Cocoa and MFC applications.

    - by Lothar
    I'm writing a GUI program and decided to go native on all platforms. But for all the stuff i need to draw myself i would like to use the same drawing routines because font and unicode handling is so difficult and complex. Do you see any negative points in useing Pango/Cairo. Well on MacOSX i havent succeded installing Pango/Cairo yet. Looks like a bad Omen. I would also like to hear about the performance penality. The first time i looked at Pango i thought, yes thats the reason why Software is still getting despite better hardware.

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  • Help Me Understand C++ Header files and Classes

    - by JamesW
    OK, So I am trying to transition from intermediate Delphi to C++ Object Oriented programing. I have read Ivar Horton's book on visual C++ 2010. I can pull off the simple console applications no problem. I get the language itself (kinda). Where I am struggling is with headers and classes. I also understand what header files and classes do in general. What I am not getting is the implementation when do I use a header or a class? Do I need to create classes for everything I do? Do my actual work functions need to be in header files or in CPP files? I'm lost on the proper uses of these and could use some real world guidance from more experienced programmers. I am trying to transition to windows applications using the MFC if that is helpful.

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  • Nesting maximum amount of shapes on a surface

    - by Fuu
    In industry, there is often a problem where you need to calculate the most efficient use of material, be it fabric, wood, metal etc. So the starting point is X amount of shapes of given dimensions, made out of polygons and/or curved lines, and target is another polygon of given dimensions. I assume many of the current CAM suites implement this, but having no experience using them or of their internals, what kind of computational algorithm is used to find the most efficient use of space? Can someone point me to a book or other reference that discusses this topic?

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  • Is Pex (Test generation) really usefull tool?

    - by Yauheni Sivukha
    Yes, it is possible to generate tests on boundary values for functions like "Sum" or "Divide". Pex is a good tool here. But more often we create tests on business behaviour. Let's consider example from classic Beck's tdd book: [Test] public void ShouldRoundOnCreation() { Money money = new Money(20.678); Assert.AreEqual(20.68,money.Amount); Assert.AreEqual(2068,money.Cents); } Can this test be generated? No :) 95 % of tests in my projects check business logic, and can not be generated. Pex (Especially in pair with Moles) can give 100% code coverage, but a high code coverage rate of a test suite does never indicate, that code is well tested - It only gives false confidence that everything is tested. And this is very dangerous. So, the question is - Is Pex really usefull tool?

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  • Arrays in JavaScript

    - by caramel1991
    While reading a book about JavaScript I stumbled across an example: var names = new Array("Paul","Catherine","Steve"); var ages = new Array(31,29,34); var concatArray; concatArray = names.concat(ages); My question is, why doesn't the variable concatArray need to be define as a new Array() in order to store the concatenated data for both arrays name and ages , but when I try to treat the concatArray as an array by adding another line of code "document.write(concatArray[0])", it works just like an array and shows me the data stored in the first element. I just wonder why I'm not declaring the concatArray as a new array, yet it still works as one.

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  • Ad hoc network between iPhone and non iPhone devices???

    - by gn-mithun
    Is it possible to set up a ad hoc network between an iPhone and a totally different device like camera,scanner or printer and build a data tunnel between them to exchange data or services. I believe iPhone does not have the provision of creating an ad hoc network. So i am assuming that the other device are the initiator of the ad hoc network. I tried doing the same with a mac book and iPhone and i could surf on the phone after enabling internet sharing. But i wanted to make sure that its possible with other devices as well I believe the upcoming WiFi Direct is a way to do it.

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  • deriving activity diagram-based GUIs and CRUD them with a DB?

    - by Xin Tanaka
    i received a big book full of processes. i was thinking about the end user (they will be lawyers) and decided the best GUI would be showing activity diagrams or business processes. It reminded me Quickbooks and how non-accountants can successfully use it and understand accounting processes. i began doing research before sending my project to a bunch of programmers: is there some open source solution? can i use MS Visio libraries? which UML tool is programable? what about Eclipse and its modeling tools? etc etc the key points here are: relationships between events, artifacts, actors, etc should be stored in a database. processes or steps in a process should be easily modified by updating the database do this sounds too crazy? (should I explain a bit more why it must be programmed this way?)

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