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  • How do I define a foreign key that points to a class of a different name in ActiveRecord with Rails?

    - by Mark
    Hi there, I have a model Follow that defines a user_id and a followed_user_id. If you've used Twitter, this should make sense. I'm trying to make followed_user_id point to a User model, so I can access the user that is being followed through f.followed_user (in the same way that if I have an Entry with belongs_to :user and a user_id column I can use entry.user to get the user.) How can I do this? Thanks!

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  • Remove results below a certain score threshold in Solr/Lucene?

    - by snickernet
    Hi Guys, Is there a built-in functionalities in solr/lucene to filter the results if they fall below a certain score threshold? Let's say if I provide a score threshold of .2, then all documents with score less than .2 will be removed from my results. My intuition is that this is possible by updating/customizing solr or lucene. Could you point me to right direction on how to do this? Thanks in advance!

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  • CLIM tutorial, where?

    - by krzysz00
    I am thinking of using McClim for an application, where can I find a tutorial that covers buttons, keyboard/mouse I/O, drawing images, etc. STFW for mcclim tutorial and clim tutorial didn't help much. Any pointers? If such a tutorial doesn't exist, please point that out and I';; try to RTFM (maybe eventually write such a tutoriial)

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  • QR code - where can I find (free) code to embed my own generator on a web page?

    - by Robbert Huisman
    Hi, couldn't find it exactly from earlier questions, but I am probably repeating an earlier question, so apologies upfront ;-) I am looking for a simple code to embed a QR 2D code generator on a website I am building. I assume their should be some free open source code for that but I could only find paid software. Can anyone point me in the right direction? would be mostly appreciated! best regards, Robbert

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  • How does Software/Code actually communicate with Harware?

    - by AbyJames
    My question is: When I press the "Shut down" button in Windows/Linux,the computer shutdowns.How did the command "Shut down" actually make the computer Physically shutdown? To make my point clear: When we kick a ball,there is physical contact between the ball and our leg,for the ball to move.So how is the physical connection achieved between softwares and hardwares?How does plain text of codes make the computer do what it does? (Noob question,I know but it has been irritating me for quite sometime now) -Aby

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  • Google Maps API v3 show local businesses/points of interest

    - by julio
    I know at some point I'd come across a Google service built into their API that would provide local information as markers on the viewport (schools, hospitals, etc.)-- I believe this was a simple control that could be added just like the normal map controls, to allow users to turn it on or off with a checkbox or button. I can't seem to find this feature documented anywhere in the v3.0 API docs. Can anyone provide some information on this, or let me know if it was deprecated? Thanks

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  • wchar to char in c++

    - by Chris
    I have a Windows CE console application that's entry point looks like this int _tmain(int argc, _TCHAR* argv[]) I want to check the contents of argv[1] for "-s" convert argv[2] into an integer. I am having trouble narrowing the arguments or accessing them to test. I initially tried the following with little success if (argv[1] == L"-s") I also tried using the narrow function of wostringstream on each character but this crashed the application. Can anyone shed some light? Thanks

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  • Re-Inventing The Label Control

    - by j-t-s
    Hi All, I need to reinvent/recreate the Label Control from scratch to add my own mojoness to it. Yes, I know what you're thinking (and if you're not thinking that, shouldn't you be?). Can somebody point me in the right direction? Thank you.

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  • replacing a path with sed

    - by compie
    How can I use sed to replace this line char * path_list_[1] = { "/some/random/path" }; with this line char * path_list_[2] = { "lib/foo", "lib/bar" }; in a file named source.c Notes: * The path is really random. * Your solution should only change this line in source.c * I'm only interested in a sed oneliner. You can use this Python regex as a starting point: text = re.sub('static const char \* path_list_\[1\] = \{ "[^"]*" \};', 'static const char * path_list_[2] = { "lib/sun", "lib/matlab" };', text)

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  • Tutorial how to create a CXF web service from existing Java code and embed it in Tomcat

    - by EugeneP
    Do you know a tutorial how to create a CXF web service from existing Java code and embed it in Tomcat, and also generate a wsdl file so that any .NET system would be able to generate client code easily? I miss that WSDL creation point in, for example this http://www.ibm.com/developerworks/library/ws-pojo-springcxf/ tutorial. No wsdl file is generated. But still it should be present in my case to provide system interoperability.

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  • How to use LINQ for CRUD with a simple SQL table?

    - by Rob Ferno
    Every LINQ blog I found there seemed around 2 years old, I understand the syntax but need more direction on creating the SQL mapping and context classes. I just need to use LINQ for 2 SQL tables I have, nothing complicated. Do folks write the SQL mapping classes by hand for such cases or is there a decent tool for this? Can someone point me in the right direction?

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  • database design: table with large amount of columns (50+) or many sub tables with small amount of co

    - by Guillaume
    In our oroject we already have a lots of tables (100+). Some of them contains a lot of columns (50-100) and we are facing the need of adding more columns from time to time. What do you think is best - from maintenance and performance point of view - to split these huge tables in smaller entities or to keep the tables the way they are ? We are using an ORM tools, so we don't need to write custom request.

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  • Safari cannot recognise GWT History token

    - by user311758
    I my application we sent registration email to customer and sends link in that email which contains url#historytoken. On click of this link customer should go to the page specified by that url for historytoken.We are using GWT so entry point handle the request for historytoken. This works on all browsers except Safari. Safari go to the url but cannot recognise the history token after that and remains on the url page. Please help me solve this problem.

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  • HTML5 Offline Storage on iPad and iPhone BUG

    - by scaraveos
    Hello everyone, I created a manifest file with 1000 items. Safari, Mozilla browsers are saving the files offline successfully and even Android saves the files correctly offline. On iPad and iPhone when I am trying to save more than 300 items in some point the applicationCache returns "error". When I am trying to save less (e.x.: 200) it saves the files correctly and the applicationCache returns "cached". Any ideas? Thank you.

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  • Not very objective - please help

    - by chainwork
    I am having trouble understanding the meaning and more importantly the concept of an object as it relates to jQuery. I understand the basics that its a collection of data that comes in two forms, properties and methods but I kind of get lost on how it works beyond that. Can anyone point me to some good tutorials that maybe helped you understand? I'm hoping to "Get it" once and for all. Many many thanks for your help! =]

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  • Cryptic C++ "thing" (function pointer)

    - by m00st
    What is this syntax for in C++? Can someone point me to the technical term so I can see if I find anything in my text? At first I thought it was a prototype but then the = and (*fn) threw me off... Here is my example: void (*fn) (int&,int&) = x;

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  • c#: can you use a boolean predicate as the parameter to an if statement?

    - by Craig Johnston
    In C#, can you use a boolean predicate on its own as the parameter for an if statement? eg: string str = "HELLO"; if (str.Equals("HELLO")) { Console.WriteLine("HELLO"); } Will this code output "HELLO", or does it need to be: string str = "HELLO"; if (str.Equals("HELLO") == true) { Console.WriteLine("HELLO"); } If there is anything else wrong with the above code segments, please point it out.

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  • doubt regarding sequence points

    - by tushar
    i recently came across a question about sequence points in c++ at this site what the code will output: int c=0; cout<<c++<<c; it was answered that the output is undefined and << is not a sequence point but still i want to know why does it that even if i compile it 25 times it still prints 01

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  • Split a string by two characters

    - by David
    Hi, Firstable i want to match if a string has the following format: $abc #xyz or $abc .xyz. The abc and xyz mean only alphanumeric string. If it's matched then i need to extract the first $abc and the last #xyz, all that using pure javascript and maybe regex. The pattern is in the following order: Dollar Sign Unlimited alphanumeric string space a hash or point Unlimited alphanumeric string Thanks in advance for any help.

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