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• SEO Friendly URLs where the phrase used may change in Rails

  - by Newy

  Say I have http://www.mysite.com/I-Like-Cheeseburgers and I want that to point to Item with id 3. Sometime later, I change the name of the item, and now its http://www.mysite.com/I-Like-Hamburgers (and perhaps many more times). I want all these URLs to remain pointing to Item 3. Is it efficient to simply keep a table of [strings,item_ids] and do a lookup on this? Is there a better way?

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• MySQL: How to check if a string is a valid DATE, TIME or DATETIME

  - by Svish

  When I try to put a value into a DATE field which is invalid, MySQL seems to use 0000-00-00 instead. Is there a way I can do this "check" without updating a DATE field? And to do it from for example PHP? Like, is there a way I can query the MySQL server and ask "Hey, is this DATE, TIME or DATETIME valid to you?" Or is there maybe an even better way of doing it?

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• Best way to ask confirmation from user before leaving the page

  - by JohnathanKong

  Hey Everyone, I am currently building a registration page where if the user leaves, I want to pop up a CSS box asking him if he is sure or not. I can accomplish this feat using confirm boxes, but the client says that they are too ugly. I've tried using unload and beforeunload, but both cannot stop the page from being redirected. Using those to events, I return false, so maybe there's a way to cancel other than returning false? Another solution that I've had was redirecting them to another page that has my popup, but the problem with that is that if they do want to leave the page, and it wasn't a mistake, they lose the page they were originally trying to go to. If I was a user, that would irritate me. The last solution was real popup window. The only thing I don't like about that is that the main winow will have their destination page while the pop will have my page. In my opinion it looks disjoint. On top of that, I'd be worried about popup blockers. Just to add to everyones comments. I understand that it is irritating to prevent users from exiting the page, and in my opinion it should not be done. Right now I am using a confirm box at this point. What happens is that it's not actually "preventing" the user from leaving, what the client actually wants to do is make a suggestion if the user is having doubts about registering. If the user is halfway through the registraiton process and leaves for some reason, the client wants to offer the user a free coupon to a seminar (this client is selling seminars) to hopefully persuade the user to register. The client is under the impression that since the user is already on the form, he is thinking of registering, and therefore maybe a seminar of what he is registering for would be the final push to get the user to register. Ideally I don't have to prevent the user from leaving, what would be just as good, and in my opinion better is if I can pause the unload process. Maybe a sleep command? I don't really have to keep the user on the page because either way they will be leaving to go to a different page. Also, as people have stated, this is a terriable title, so if someone knows a better one, I'd really appreciate it if they could change the title to something no so spammer inviting.

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• What's the best way to generate an API reference document using a Rails routes.rb file?

  - by RNHurt

  I am trying to document the API for my Rails application and I can't help but wonder if there is a better way to generate an XML file based on my routes.rb file. I'm envisioning something similar to the output of rake routes but in a more friendly, XML type format. Corey has some interesting ideas about using reflection/introspection on the routes file here but it's not quite what I need. Please tell me this is a solved problem and I'm not the first one to think of this. :)

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• Complicated programming and math tasks online. Any?

  - by Tom

  Maybe it is not very thematic question in here, but I guess it will be interesting not only to me. I hope. So, I just want to get some cool tasks to do using programming languages or just pen and sheet of paper. I guess it can lead to improving my ability to do better code (more optimal I mean.) Do you know any websites where I can find it? Thanks.

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• MVVM:How am I supposed to convert a ViewModel into a Model ?

  - by msfanboy

  Hello, everyone speaks about wrapping a model by a viewmodel. fine so far. But when I want persist my Model, how do I convert a ViewModel into a Model ? Reading all properties from the ViewModel into a new Model object seems very cumbersome. Any better method?

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• initializing hashes

  - by Paul

  Seems like I am frequently writing something like this... a_hash['x'] ? a_hash['x'] += ' some more text' : a_hash['x'] = 'first text' seems like there ought to be a better way, but I can't find it.

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• Using Int32 or what you need

  - by Sir Psycho

  Should you use Int32 in places where you know the value is not going to be higher than 32,767? I'd like to keep memory down, hoever, using casts everywhere just to perform simple arithmetic is getting annoying. short a = 1; short result = a + 1; // Error short result = (short)(a + 1); // works but looks ugly when does lots of times What would be better for overall application performance?

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• What is a good metaphor for c memory management?

  - by fsmc

  I'm trying to find a good metaphor to explain memory allocation, initialization and freeing in c to a non technical audience. I've heard pass-by-reference/value talked about quite well with postal service usage, but not so much for allocation/deallocation. So for I've thought about using the idea of renting a space might work, but I wonder if the SO crew can provide something better.

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• Setting UITableViewCell height is expensive

  - by Sheehan Alam

  I am doing a comparison in - (CGFloat)tableView:(UITableView *)tblView heightForRowAtIndexPath:(NSIndexPath *)indexPath It seems like performance of my app really slows down when I check if a cell.detailTextLabel.text isEqualTo:@"None"; What is a better way of doing the comparison and setting the cell height?

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• sort an array such that one half of the array has even numbers in ascending order and the other half

  - by nd81

  Design an algorithm with min time and space here is my solution - assume a array of N elements with 32 bit integers use a bit array to set the appropriate bits the array is sorted now assign even numbers to the first half of the array in ascending order assign odd numbers to the second half of the array in descending order any better solution ?

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• Correct to check for a command line flag in bash

  - by BCS

  In the middle of a scrip, I want to check if a given flag was passed on the command line. The following does what I want but seems ugly: if echo $* | grep -e "--flag" -q then echo ">>>> Running with flag" else echo ">>>> Running without flag" fi Is there a better way? Note: I explicitly don't want to list all the flags in a switch/getopt. (And BTW the bodies of the if just set a set of vars)

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• What do people find difficult about C pointers?

  - by Paul

  From the number of questions posted here, it's clear that people have some pretty fundemental issues when getting their heads around pointers and pointer arithmetic. I'm curious to know why. They've never really caused me major problems (although I first learned about them back in the Neolithic). In order to write better answers to these questions, I'd like to know what people find difficult. So, if you're struggling with pointers, or you recently were but suddenly "got it", what were the aspects of pointers that caused you problems?

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• C#, string comparison InvariantCultureIgnoreCase vs OrdinalIgnoreCase?

  - by JL

  Which would be better code: int pos = file.dmFileDescr.LastIndexOf(".", StringComparison.InvariantCultureIgnoreCase); or int pos = file.dmFileDescr.LastIndexOf(".", StringComparison.OrdinalIgnoreCase);

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• PHP remote project and subversion

  - by jax

  I am working on a live remote php project in eclipse. ie, I just connect the the project using RSE edit the files and save. I have recently setup subeclipse and am wondering if there is an way to add my php files to a subversion project while still working on the live project? Or maybe there is a better way to do this and get the same result.

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• How can I wrap an executable on UNIX (SunOS) so that it is never run more than once at the same time

  - by user332815

  I have an executable (no source) that I need to wrap, to make sure that it is not called more than once at a time. I immediately think of some sort of queue wrapper, but how do I actually make it so that my wrapper is called instead of the executable itself? Is there a better way to do this? The solution needs to be invisible because the users are other applications. Any information/recommendations are appreciated.

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• How do you debug MySQL stored procedures?

  - by Cory House

  My current process for debugging stored procedures is very simple. I create a table called "debug" where I insert variable values from the stored procedure as it runs. This allows me to see the value of any variable at a given point in the script, but is this is there a better way to debug MySQL stored procedures?

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• Which technology(MFC/Win32) is more sutaible for directx application.

  - by Rushi

  Hi i am developing game level editor.Currently I am using win32 with directX.But with win32 I cant achieve fully object oriented implementation.So I am thinking to develop it in MFC. Will it be better option than win32? Which technology(MFC/Win32) is widely used in industry? Also which technology is most suitable for my project?

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• Reconstruction of java command line arguments

  - by notnoop

  Is there a way to reconstruct the command line arguments passed to Java within a Java program, including the JVM options and classpath option? I have a Java program that needs to restart the JVM and manipulate its bootclasspath (i.e. trying to override some system classes). I use the libc system method to invoke the new JVM. I'm open for better approaches, but Java agents isn't an option.

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• Compare two times without regard to Date associated - Ruby

  - by H55nick

  I am trying to find the difference in time (without days/years/months) of two different days. Example: #ruby >1.9 time1 = Time.now - 1.day time2 = Time.now #code to make changes #test: time1 == time2 # TRUE My solution: time1 = time1.strftime("%h:%m").to_time time2 = time2.strftime("%h:%m").to_time #test time1 == time2 #True #passes I was wondering if there was a better way of doing this? Maybe we could keep the Date the same as time1/time2?

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• What trace flags are needed for detecting deadlocks

  - by AngryHacker

  I am trying to get better information on deadlocks that are occurring in my DB. After reading this article, it's still unclear to me whether I should be using trace flag 1204, 1222 or both.

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• Which is preferred: new Nullable<int> or (int?)null ?

  - by abatishchev

  Which way is preferred in expressions like this: int? Id { get { int i; return Int32.TryParse(Request["id"], out i) ? i : (int?)null; } } is it better to cast on null or create a new Nullable<T> ?

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• PHP Performance Question (readable code or not, web app)

  - by AESM

  I wondered if I should write my code clean and readable or rather small and unreadable... Or should I write it readable and then compress it afterwards when I'm publishing it on the web? Ps. I'm building a web app, the faster, the better! Thanks_

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• Is there a way to set a handler function for when a set of events has happened in JavaScript?

  - by allyourcode

  eg I have two concurrent AJAX requests, and I need the result from both to compute a third result. I'm using the Prototype library, so it might look something like this: var r1 = new Ajax.Request(url1, ...); var r2 = new Ajax.Request(url2, ...); function on_both_requests_complete(resp1, resp2) { ... } One way would be to use polling, but I'm thinking there must be a better way.

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• XNA 2D/3D Drawing method?

  - by Adir

  What would be a better parctice, writing the drawing method inside the GameObject class or in the Game class? GameObject obj = new GameObject(); obj.Draw(); Or GameObject obj = new GameObject(); DrawGameObject(obj);

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