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• undefined local variable or method `user', using CarrierWave for profile images

  - by Amar H-V

  I've been following Ryan Bates' Railscasts tutorial on CarrierWave, which you can find here Everything works fine, except for when I go to view my profile, it gives me this error: undefined local variable or method `user' I don't know why it is telling me this, as I am using Devise for my authentication, and that is the name of my model. Below are some of the files which may be useful: https://gist.github.com/amarh21/7439421 I am using Rails 4.0.1 and ruby 2.0.0

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• PHP:Generating crystal report

  - by pavun_cool

  Hi All , Can any one suggest me the tutorial for generating the crystal report using php . Thanks.

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• Flex: Manually adding drag and drop support

  - by Aethex

  I have a container that contains an image that I need to drag from one container to the other. The Flex language references don't specify anything useful, nor did I find a tutorial for how to do this. How do I manually add drag and drop support for elements like images? Any help would be greatly appreciated.

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• Coldfusion - Sending out a pretty email, mint style

  - by nobosh

  I've used coldfusion for sending text emails for years. I'm not interested in learning how to send those pretty emails you see from companies like Mint. Anyone know of a good Coldfusion tutorial to teach me how to make this work and not get hit by bugs or spam filters? Thxs

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• Data Generation Plan Missing from VS2010 Pro

  - by chobo2

  Hi I was following this tutorial http://nepomucenobr.com.br/blog/post/Generating-e2809cdummy-datae2809d-with-Visual-Studio.aspx and I got to the point where I am should add a data generation plan file. Yet when I click on the folder there is not data generation plan file. I don't know why. Do I have to install it separately or what? Or is it because I am using 2005 express?

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• Problem installing mysql 5 on Ubuntu 10.10

  - by mujer esponja

  Hello! In my Ubuntu 10.10, following this tutorial, I don't face step 2. I mean, while installing the packets, I don't face anything related to configuration. Then, when I run a command, such a mysql -u root -p , I get this error: ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) As I see in other treads, ps aux | grep mysqld gives me just this output: 1000 4508 0.0 0.0 5172 760 pts/0 S+ 19:53 0:00 grep --color=auto mysqld What is happening?? Thanks in advance

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• Django: How to handle imports in a reusable app

  - by facha

  everyone I'm just starting with django. It is not quite clear to me, how should I write an app I could reuse later. In every tutorial I read I see the same piece of code: view.py from project.app.models import MyModel So, if I move my apps to another project, I'll have to modify the "project.app.models" so that it looks like "project2.app.models" for every app I move. Is there a way to avoid that? Thanks in advance.

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• How do I create a simple video effect filter for DirectShow or DMO?

  - by Ole Jak

  How do I create a simple video effect filter for DirectShow or DMO? What I need is simple - a tutorial or tutorials on how to create simple filter (like a brightness/contrast adjustment filter or any other pixel-per-pixel kind of filter) for filtering Direct Show Video astream (so I want to have a graph like "my Web Kamera" - "My photoshop like filter" - "rendering (or saving to file)".

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• how can i show multipoint toolbox

  - by mariam

  Hi all I am new to c# language and i need help from you, i downloaded the multipoint SDK when i saw the tutorial video i noticed that the multipoint toolbox doesn't appear in left of screen? how can i do it .... please i really need your help in this beacuse I am using it for my graducation project and i got really interseted in this software please help me and i really appreciate your help thanks in advance Mariam

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• Recommend me a good book/source for learning for Web Design

  - by Idlecool

  Hi, While web development/design, I found coding it self is not enough to develop an attractive website so i have urge to learn photoshop.. i want to know what can be the best way to learn photoshop (preferably Photoshop CS4 Extended) mainly for website design. I experienced web tutorials are not enough for effectively learning computer languages, but not sure about photoshop coz it is a different job.. please recommend me a book / web tutorial for learning Photoshop.

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• How to do motion tracking of a object using video

  - by Niroshan

  Could someone direct me to a tutorial or guide me how to track motion of a object moving with 6 DOF. I am planing to use a video stream of a moving toy car. I want to calculate displacement and rotation angle of the toy car. I came across some research papers but couldn't find any libraries to the job. Is there a way to do this using OpenCV or Matlab or some other freely available software? Thank you

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• compilation of image stitching code in matlab

  - by chee

  i am facing lots of problems while running code for image stitching given at this link http://se.cs.ait.ac.th/cvwiki/matlab:tutorial:image_stitching_from_high-view_images_using_homography may i get help regarding this type of problems here. EDIT: Image stitching code fails with the following message: ??? Undefined function or variable 'x2'. Error in ==compute_direct_homography at 26 amplified_x2=x2.*repmat([diagonal_ratio(x1,x2) diagonal_ratio(x1,x2) 1]',1,size(x2,2)); %assumption 1degree of lat and long =110,000 meters refer wiki Error in == project at 3 compute_direct_homography;

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• Display video from youtube channel to iphone

  - by Suresh Varma

  Hello friends, Is it possible to play the video from youtube channel through iphone sdk code? If yes please pass on the link or tutorial for the same. Thanks in advance

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• Adapter Methods in Android?

  - by Praveen Chandrasekaran

  i have go through the three methods in Adapters classes. getView() newView() bindView() what are the difference between those methods? please share some tutorial, sample code or logics to understand this. Thanks. i have to create a listview with the progressive icons. which adapter you suggest me to do that?

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• Iphone core-plot line graph

  - by Chris

  Hi is there some sample code or tutorial about how to draw a line-chart using core-plot? I can't find anything with google..

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• How to make people to see each other on the website through web camera?

  - by Donator

  I want to run a website where people could see each other through web camera. I can't find anything in google, so, can you give me any suggestions or link to tutorial? Thanks

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• install GlassFish on VPS

  - by ManWard

  hi i want install GlassFish into the VPS.now i need tutorial for installing GlassFish on VPS [Linux OS] and configure it.also how can i point separated domains to separated Web applications on Enterprise Server ? thanks

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• Where can find examples and tutorials for Perl's Net::Pcap module?

  - by dan

  Could someone provide a good documentation / tutorial/ PDFs/ reference to book link about Net::Pcap in addtion to the module documentation and this Perl and Net::Pcap article on PerlMonks?

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• what's the best way to learn C++ and Qt at the same time?

  - by Daniel Hill

  Hi I did A Google search and couldn't find anything, so I wanna learn Qt/C++ my University (I'm a first year CompSci Student) won't be teaching C++ next year which is a big disappointment I already know Python and dabbled in LaTeX, Javascript, C++ I'm currently helping out a free software project Clementine but it's programmed in Qt/C++ and I don't know enough of both to help out enough. Is there any tips, Tutorial, howtos out there?

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• hash password in mssql (asp.net)

  - by ile

  Is this how hashed password stored in mssql should look like? This is function I use to hash password (I found it in some tutorial) public string EncryptPassword(string password) { //we use codepage 1252 because that is what sql server uses byte[] pwdBytes = Encoding.GetEncoding(1252).GetBytes(password); byte[] hashBytes = System.Security.Cryptography.MD5.Create().ComputeHash(pwdBytes); return Encoding.GetEncoding(1252).GetString(hashBytes); } Thanks, Ile

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• advance/basic and smartphone views in Rails

  - by aleds

  In a new Rail app I have to consider 2 differents user's type: basic and Advanced and I have to create smartphone views( unique view for both user's type). Then I have 3 view/layout: - web advance - web basic - smartphone I already have the adv/basic flag for the user, and I followed the RBates tutorial http://asciicasts.com/episodes/199-mobile-devices. What is the best way to manage the 3 views/layout ?

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• django-admin.py startproject mysite not working well on windows 7

  - by john

  Hi I'm learning django and I did successfully start a site on Window XP by following the tutorial. However, on Window 7 when I issued: django-admin.py startproject mysite python.exe was started and a window appeared to ask me to choose either python.exe or other program to open a file.... did I do anthing wrong or there are more tricks for window 7? thanks.

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• Decrypt PHP encrypted string in C#

  - by NotDan

  I have a string encrypted in PHP that I would like to decrypt in C#. I used the tutorial below to do the encryption, but am having problems decrypting. Can anyone post an example on how to do this? http://www.sanity-free.org/131/triple_des_between_php_and_csharp.html

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• Application stopped unexpectedly at Luanch

  - by Chris Stryker

  I've run this on a device and on the emulator. The app stops unexpectedly on both I have not a clue what is wrong currently It uses Google API Maps I compiled with Google Api 7 Followed this tutorial http://developer.android.com/guide/tutorials/views/hello-mapview.html (Made some alterations clearly) I did use the correct API Key That the final apk is signed with This is the source(If you compile it shouldnt work as it is unsigned) This is the compiled signed apk

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• Try & Catch — How do you use them effectively?

  - by Kaji

  I've been trying to teach myself JavaScript, and one thing I was reading on is the try/catch structure. Unfortunately, the tutorial doesn't provide much explanation on how it would be useful, just how to set it up. Can anyone offer some insight?

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