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• Rails - single ID for multiple models

  - by user352351

  I'm building an app which will allow a user to scan the barcode on a 'shelf', 'box' or 'product' which will then bring up that particular item or all the associated items. As these are all separate models with their own ID's, I need a global ID table. I was thinking of a polymorphic table called 'barcodes' barcodes id barcode_number barcodable Is there an easy way to do this? Or is polymorphic the best way?

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• Selecting favourites from DB rails 3

  - by Richlewis

  I have a small app which has Users, Recipes, Ingredients and preparation models A user has many recipes, recipes belong to user and ingredients/preparation belongs to recipes. Now a user can view all recipes but I would like the option to add the particular recipe to a favourites list. Would I need to set a new DB to hold this and then link by associations or could I add a column to the recipe model called fav for example? Im looking for the best practice here or if someone has done this before and can offer any advice that would be appreciated

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• I need some advice from Experts on how to develop a PHP site with MySQL

  - by mouthpiec

  Hi, I need some advice from experts :) I will develop a website using PHP and I will use also MySQL. I bought some server space from a Virtual private server including all the service needed. How should I develop the site? Shall I develop it on my machine at home (using for example Wamp), and when ready transfer all the files to the server? If so what is the best method to transfer also the database? Thanks in advance!!

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• How is <tgmath.h> implemented?

  - by sync

  C doesn't have (to the best of my knowledge) overloading or templates, right? So how can a set of type-agnostic functions with the same name exist in plain ol' C? The usual compile-time trickery would involve a whole bunch of macros, wouldn't it?

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• Join two results sets to make one result set in T-SQL

  - by Michael Kniskern

  What would be the best approach to combine the two results sets in one result set in T-SQL? SQL statment #1: SELECT COUNT(t.col1) as 'Number of Responses', t.col2 as 'Department' FROM table t WHERE col3 IS NOT NULL GROUP BY t.col1 ORDER BY t.col1 SQL Statment #1: SELECT COUNT(t.col1) as 'Total number of participants', t.col2 as 'Department' FROM table t GROUP BY t.col1 ORDER by t.col1 Desired result set Number of Responses | Total Number of participants | Department

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• Equivalent of PHP "echo something; exit();" with Python/Django?

  - by Infinity

  Sometimes the best way to debug something is to print some stuff to the page, and exit(), how can I do this in a Python/Django site? e.g. in PHP: echo $var; exit(); Thanks

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• C++: Assign L"" string to WCHAR?

  - by Rosarch

  I have a WCHAR: WCHAR foo[200]; I want to copy values into it: if (condition) { foo = L"bar"; } else { foo = L"odp"; } What is the best way to do this?

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• How to track how many times an iPhone app is opened?

  - by Jason

  I am building an iphone app and would like to keep track of how many times it has been opened so that I can prompt the user to do certain actions after it has been opened X number of times. I have thought about storing a variable in Core Data which I update every time it is opened, but this seems like a waste since it is a singleton data, not multiple instances of an object. What is the best way to store data like this and access it without slowing down the app opening time?

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• Moving to 64-bit on OS X?

  - by ML

  Hi All, What is the best practice for moving to 64-bit on OS X? Using the 10.6 SDK and 64-bit intel as my SDK and target. I have int32 types to change Does OS X have an 'int64' or would one use a 'long long'? Where might I find a resource to available data types? What other issues are there?

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• unique substrings using suffix tree

  - by user1708762

  For a given string S of length n- Optimal algorithm for finding all unique substrings of S can't be less than O(n^2). So, the best algorithm will give us the complexity of O(n^2). As per what I have read, this can be implemented by creating suffix tree for S. The suffix tree for S can be created in O(n) time. Now, my question is- How can we use the suffix tree for S to get all the unique substrings of S in O(n^2)?

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• NUL symbol gets inserted anywhere in the XML

  - by Racs

  I am using Oracle 11g and when I query data from database manually, it looks ok. But when I view it using Notepad++, there is a special character that gets inserted anywhere in the xml produced. Please see image below: I tried everything and deleted some parts of the xml, updated the db and query again but the invalid character just differ in location. Any idea is much appreciated, thanks! Best regards, Racs

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• Java Programing Requirments

  - by hosseinsinohe

  Hi All I am a C sharp Programmer.I Want Learn Java to Implement My Windows Application.But i Don't know What IDE and What Tools Can Help me. Please Help me to Choose Best PlatForm And IDE and Other Tools.

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• Database Design Question

  - by Soo

  Ok SO, I have a user table and want to define groups of users together. The best solution I have for this is to create three database tables as follows: UserTable user_id user_name UserGroupLink group_id member_id GroupInfo group_id group_name This method keeps the member and group information separate. This is just my way of thinking. Is there a better way to do this? Also, what is a good naming convention for tables that link two other tables?

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• How to get ordered qty of product in front-end?

  - by alex

  I display a best-sell list in front-end,Now I also want to show the QTY that how many already sell for this product,How do I get the QTY ? And if the product is a "Configurable Product",How do I get the QTY ?

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• Function equivalent to sprintf() with maximum number of characters to be copied?

  - by Tommy

  function(char* name) { char sql[50]; sprintf(sql, "select %s;", name); } What's the best way to make sure only 50 chars of name are copied to sql in the case name is larger than what sql can hold? (sprintf with a N parameter?) Thank You.

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• Learning C++ on Linux or Windows?

  - by ReDAeR

  Hi, Since you 'should' learn C/C++ and as part of 'learn as much languages as possible', i decided to learn C++ in depth. My OS is Windows and my question is should i re-install Linux as a dual boot to learn C++ on Linux? Do i miss something if I develop in C++ only on the Windows platform? (possible duplicate: http://stackoverflow.com/questions/1128050/best-operating-system-for-c-development-and-learning)

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• How to connect my APP to SQL Server?

  - by salhzmzm

  Hi I have 1 PC (MS Server 2003 + MS SQL Server 2008) and 2 PCs (MS SP2 + my APP) how I can let my APP connects to sql server 2008 on other PC My APP will connect to server to store data in SQL Server 2008 and read/delete/edit (basic operations) what is the best way to do that? NOTE: my APP is written in C# (.NET Platform)

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• Will the Windows service be 64-bit if installed from 64-bit process?

  - by nhaa123

  Hi, Just wondering, if I install a Windows service from 64-bit process (service code embedded in the process), is the service itself Win32 service or can services be 64-bit as well? I need to know this since my service would inject code to Win32-process, so due to WOW64 restrictions the service-process itself cannot be 64-bit. Best regards, nhaa123

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• haskell check for user input errors

  - by snorlaks

  Hello. Im writing app in haskell and I would like to know that is the best way to check if users input is ok for example is it int when Im asking for int or if its date when asking for well formed date ? Thanks for help

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• How to share an array in Python with a C++ Program?

  - by mellort

  I two programs running, one in Python and one in C++, and I need to share a two-dimensional array (just of decimal numbers) between them. I am currently looking into serialization, but pickle is python-specific, unfortunately. What is the best way to do this? Thanks

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• How can I have a submit button (in grails) update a specific target frame?

  - by pennstatephil

  I'd like to use something like the "update=" parameter of a <g:remoteLink> with a <g:actionSubmit>, so that when the submit button is clicked, it will update a specific target. What's the best way to accomplish this?

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• Script to parse emails for attachments

  - by Swanny

  I am looking for a way to monitor a Linux mbox email account, when an email arrives I would like to download an attachment from the email and save the attachment (CSV file) so that it may be used by a PHP script. What would be the best way of going about this? I have looked at PHP's IMAP functions but this does not appear to be the most appropriate method when a simple bash script may be all that is required?

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• Stuck. I need some VBA code to insert double-quotes around strings in each cell in an excel range.

  - by cmm

  I'm familiar with VB.NET, but VBA in excel has me stumped. With my best attempt, I get a "Type mismatch" error: Sub AddQuotes() For Each x In Range("List").Cells x.Text = "*" * " & x.text & " & "*" Next End Sub

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• How to "scan" a website (or page) for info, and bring it into my program?

  - by James

  Well, I'm pretty much trying to figure out how to pull information from a webpage, and bring it into my program (in Java). For example, if I know the exact page I want info from, for the sake of simplicity a Best Buy item page, how would I get the appropriate info I need off of that page? Like the title, price, description? What would this process even be called? I have no idea were to even begin researching this.

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• Organize address cache

  - by Orsol

  Hi, I need to organize cache in mySql database for address - coordinates. What is the best practice to store address? Do i need to compress address string or use it as is? edit: Ok, let's I reassert my question. How to store long (up to 512) string in database if I need to search by exactly this string in future.

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