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  • SQL Server version of MySQL's group_concat and escaped strings

    - by TheObserver
    I only have the Express versions of MS SQL Server 2008 and Visual Studio. Given that I can't create a SQL Server project and therefore CLR solutions are out of the question, I've attempted to use select col1, stuff( ( select ' ' + col2 from StrConcat t1 where t2.col1 = t1.col1 for xml path('') ),1,1,'') from StrConcat t2 group by col1 order by col1 to get a row concatenated col2. col2 is a varchar field with some control characters like & and \n. When it is concatenated with the above SQL, it appears to escape those control characters ie. & becomes & amp ; and \n becomes &#xOD, which is not what I want it to do. So, the question is, what black box magic is causing that to happen?

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  • Why does the ASP.Net Web Forms model "suck"?

    - by Daniel Magliola
    I've heard Jeff Atwood, Joel Spolsky, and many other legendary people talk about how the ASP.Net Web Forms model sucks. (So this question is kind of directed to them, hopefully Jeff is reading) Now, I highly respect their opinion, given their background and expertise, but truth be told, I absolutely LOVE ASP.Net. I think the model is brilliant, and it sucks if you have no idea what you're doing, but once you understand how to control ViewState, when to use handlers instead of pages, etc, it is generations ahead of all the other models. So every time I hear someone complain about how it sucks, I can't help ask the same question... Why? What is it that's so bad about it? I appreciate all opinions. I'm assuming there's probably a post at Jeff's blog talking about this too...

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  • [Java] Form data transition into entity beans to persist them by the server side ORM

    - by cscsaba242
    Hello guys, Is there any good explanation or tutorial which describes the common way how can we create entity beans from the received data of the form ? The main reason of my question the treating the received ids (e.g id of country,city and so forth) which is the way from the id to entity ? Example: ................Client side form username:String countryid:Integer (could be a drop down) ................Server side entities public class UserBean { String username; CountryBean Country; } public class CountryBean { String cityname; Integer id; } ............................................ Maybe the question is dependent of the used technology, but I guess there is a very common way. I would like to comprehend the conventional approach of this problem. (For the sake of the completeness I would like to save the form data (received by Stripes) by JPA) Thanks advance. cscsaba242

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  • What programming technique / practice done by you was ahead of its time?

    - by Binoj Antony
    I once built a very good web application in ASP (classic) back in 2001 and extensively used XmlHttpRequest object in it. (I was lucky that the clients were only using IE, and only IE supported this object at that time). Then later when people started talking about AJAX in 2005, It felt good to have used something ahead (or early) of its time. Well, maybe this does not qualify to be listed as something done ahead of its time. Which programming technology/technique/practice have you done that was ahead of this time. One story per answer please. The title for this question taken from an opposite question here.

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  • Code Golf: Banknote calculator

    - by paxdiablo
    This question was posted by a C beginner and it was an exercise to calculate, given a dollar value input by the user, the minimum number of bills (or banknotes, depending on your locale) needed to reach that dollar value. So, if the user entered 93, the output would be: $20 bills = 4 $10 bills = 1 $5 bills = 0 $1 bills = 3 Finally succumbing to the phenomenon (it's a slow day here), I thought this would be ripe for a game of Code Golf. For fairness, the input prompt needs to be (note the "_" at the end is a space): Enter a dollar amount:_ I think I've covered all the bases: no identical question, community wiki. I won't be offended if it gets shut down though - of course, I'll never be able to complain about these types of questions again, for fear of being labelled a hypocrite :-) Okay, let's see what you can come up with. Here's a sample run: Enter a dollar amount: 127 $20 bills = 6 $10 bills = 0 $5 bills = 1 $1 bills = 2

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  • WebsiteSpark & Visual Studio 2010

    - by Amadiere
    Having a look around at WebsiteSpark from Microsoft - the deal is good (especially if you were looking to go down this path already). But I'm one of those people that likes to 'wait for the next version' if I'm in no rush to sign up. One question that's been bugging me is whether or not the program includes upgrades to Visual Studio and/or they will change the starting pack at some point? Currently, If you sign up now, you get 3 copies of Visual Studio 2008. If you're umming and ahhing about the scheme, is it worth waiting and hoping that they adapt their program so that it comes with VS2010? Or maybe that they'll offer free updates to those already in the scheme? (This question may be a little subjective I guess and it probably applies to the BizSpark side of things as well. Have there been any hints set in other Microsoft programs that might indicate the outcome? ).

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  • ASP.NET MVC and ApplicationPath

    - by user93422
    Question is about paths and domains: I have an out-of-the box ASP.NET MVC project (generated by "File-New Project"). On LogOn page it does: return Redirect("~/Account/LogOn");. I have a domain name: mycompany.com, and following file structure on the server: /Root /MyApp (this is where my app goes into) Default.aspx ... I have set up following domain pointer: mycompany.com -> \MyApp When I go to mycompany.com I get an error, something about can't find mycompany.com/MyApp/MyApp/Account/LogOn Question: Where does second /MyApp path element comes from? Note: If I don't use domain pointer and deploy the site to the root - everything works just fine. Note: My hosting provider is webhost4life.com.

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  • Evaluating points in time by months, but without referencing years in Rails

    - by MikeH
    FYI, There is some overlap in the initial description of this question with a question I asked yesterday, but the question is different. My app has users who have seasonal products. When a user selects a product, we allow him to also select the product's season. We accomplish this by letting him select a start date and an end date for each product. We're using date_select to generate two sets of drop-downs: one for the start date and one for the end date. Including years doesn't make sense for our model. So we're using the option: discard_year => true When you use discard_year => true, Rails sets a year in the database, it just doesn't appear in the views. Rails sets all the years to either 0001 or 0002 in our app. Yes, we could make it 2009 and 2010 or any other pair. But the point is that we want the months and days to function independent of a particular year. If we used 2009 and 2010, then those dates would be wrong next year because we don't expect these records to be updated every year. My problem is that we need to dynamically evaluate the availability of products based on their relationship to the current month. For example, assume it's March 15. Regardless of the year, I need a method that can tell me that a product available from October to January is not available right now. If we were using actual years, this would be pretty easy. For example, in the products model, I can do this: def is_available? (season_start.past? && season_end.future?) end I can also evaluate a start_date and an end_date against current_date However, in setup I've described above where we have arbitrary years that only make sense relative to each other, these methods don't work. For example, is_available? would return false for all my products because their end date is in the year 0001 or 0002. What I need is a method just like the ones I used as examples above, except that they evaluate against current_month instead of current_date, and past? and future months instead of years. I have no idea how to do this or whether Rails has any built in functionality that could help. I've gone through all the date and time methods/helpers in the API docs, but I'm not seeing anything equivalent to what I'm describing. Thanks.

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  • How can i get Simple Plain Text from WMD Editor?

    - by stackuser1
    I'm able to get Markdown and html formated text from WMD editor. In my requirement i also need to get plain text from WMD Editor. I would like to explain a simple example. In StackOverflow we will see markdown text while typing description in wmd editor, in preview we are able to see the formated text. In Question Page, with out this markdown and formated text we are able to see the question description in two lines. I need to achieve same kind of functionality. Please suggest me what i need to do.

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  • debug javascript in release mode with yui compressions

    - by mickyjtwin
    In our build scripts, we are using YUI compressor to minify/compress javascript and css files. As this combines the js into one file, it needs to be referenced in the Master Layout script, e.g. First question is what is best way to use both, so that if we are developing (in debug mode) it will reference each js file individually? Second question, is once on production, would there be any steps/solution to debugging the javascript on the production server, i.e. conditionallly load the javascript files based on setting a "debug=true" setting in either js or .net?

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  • How to part single SVG image containing many fonts

    - by Nachiket
    Hello guys, First of all I am not a designer. so this question is may be too easy OR even worse not a proper question at all. Anyways, I have downloaded free fonts from GoSquared (link) which provides all fonts in single SVG file. So, is there any standard way or tool to convert this single SVG files into individual icon's svg/png file? (I have GIMP) By the way, It also gives .ai file, but I don't have Adobe Illustrator (in fact, I don;t have any Adobe Design too).. Cheers,

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  • One large file or multiple small files?

    - by Dan
    I have an application (currently written in Python as we iron out the specifics but eventually it will be written in C) that makes use of individual records stored in plain text files. We can't use a database and new records will need to be manually added regularly. My question is this: would it be faster to have a single file (500k-1Mb) and have my application open, loop through, find and close a file OR would it be faster to have the records separated and named using some appropriate convention so that the application could simply loop over filenames to find the data it needs? I know my question is quite general so direction to any good articles on the topic are as appreciated as much as suggestions. Thanks very much in advance for your time, Dan

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  • Text editing best practices (with tags, etc.)

    - by Ron
    Hi there, I want to create a text field with some text, that is styled with tags. Think of MS Word, some ext is bold, some is a headline, etc. The tags that style the text are not visible to the user, he just sees the text in bold. How do I preserve these tags? I mean when I backspace over the closing bold-tag, for example, how do I preserve that and prevent that the rest of the text is now bold until the end? I guess this is a pretty basic question for experiences programmers. Are there any algorithms or best practices? This problem surely has been solved before, any pointers? (If this is of any concern, I develop for the iPhone OS and the text field will be a UITextView, but my question is more general I guess.) Thanks in advance!

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  • Django : proper way to use model, duplicates!

    - by llazzaro
    Hello, I have a question about the proper, best way to manage the model. I am relative newbie to django, so I think I need to read more docs, tutorials,etc (suggestions for this would be cool!). Anyway, this is my question : I have a python web crawler, that is "connected" with django model. Crawling is done once a day, so its really common to find "duplicates". To avoid duplicates I do this : cars = Car.Objects.filter(name=crawledItem['name']) if len(cars) 0: #object already exists, update it car = cars[0] else: car = Car() #some non-relevant code here car.save() I want to know, if this is the proper/correct way to do it or its any "automatic" way to do it. Its possible to put the logic inside the Car() constructor also, should I do that? Thanks a lot!

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  • Whats the scope of c code within objective-c classes?

    - by roja
    I was reading up about bypassing objective-c's messaging to gain performance (irrelevant to this specific question) when i found an interesting bit of code: #import <Cocoa/Cocoa.h> @interface Fib : NSObject { } - (long long) cFib: (NSUInteger) number; @end @implementation Fib // c implementation of fib long long cFibIMP(NSUInteger number) { return (number < 3) ? 1 : cFib(number - 1) + cFib(number - 2); } // method wrapper for c implementation of fib - (long long) cFib: (NSUInteger) number { return cFibIMP(number); } @end My question is; when using c function, within an objective-c object, what scope is the c function (cFibIMP in this particular case) placed in? Does the objective-c class encapsulate the c function removing change of name-clash or is the c function simply dumped into the global scope of the whole objective-c program?

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  • What are the Worst Software Project Failures Ever?

    - by Warren P
    Is there a good list of "worst software project failures ever" in the history of software development? For example in Canada a "gun registry" project spent around two billion dollars. (http://en.wikipedia.org/wiki/Gun_registry). This is of course, insane, even if the final product "sort of worked". I have heard of an FBI Case file system which there have been several attempts to rewrite, all of them so far, failures. There is a book on the subject (Software Runaways). There doesn't seem to be be a software "boondoggle" list or "fiasco" list on Wikipedia that I can see. (Update: Therac-25 would be the 'winner' of this question, except that I was internally thinking more of Software projects that had as their deliverable, mainly software, as opposed to firmware projects like Therac-25, where the hardware and firmware together are capable of killing people. In terms of pure software monetary debacles, which was my intended question, there are several contenders.)

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  • How to find two most distant points?

    - by depesz
    This is a question that I was asked on a job interview some time ago. And I still can't figure out sensible answer. Question is: you are given set of points (x,y). Find 2 most distant points. Distant from each other. For example, for points: (0,0), (1,1), (-8, 5) - the most distant are: (1,1) and (-8,5) because the distance between them is larger from both (0,0)-(1,1) and (0,0)-(-8,5). The obvious approach is to calculate all distances between all points, and find maximum. The problem is that it is O(n^2), which makes it prohibitively expensive for large datasets. There is approach with first tracking points that are on the boundary, and then calculating distances for them, on the premise that there will be less points on boundary than "inside", but it's still expensive, and will fail in worst case scenario. Tried to search the web, but didn't find any sensible answer - although this might be simply my lack of search skills.

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  • Optimize SQL with Interbase

    - by Roland Bengtsson
    I was inspired by the good answers from my previous question about SQL. Now this SQL is run on a DB with Interbase 2009. It is about 21 GB in size. SELECT DistanceAsMeters, Bold_Id, Created, AddressFrom.CityName_CO as FromCity, AddressTo.CityName_CO as ToCity FROM AddrDistance LEFT JOIN Address AddressFrom ON AddrDistance.FromAddress = AddressFrom.Bold_Id LEFT JOIN Address AddressTo ON AddrDistance.ToAddress = AddressTo.Bold_Id Where DistanceAsMeters = 0 and PseudoDistanceAsCostKm = 0 and not AddrDistance.bold_id in (select bold_id from DistanceQueryTask) Order By Created Desc There are 840000 rows with AddrDistance 190000 rows with Address and 4 with DistanceQueryTask. The question is, can this be done faster? I guess, the same query is run many times select bold_id from DistanceQueryTask. Note that I'm not interested in stored procedures, just plain SQL :)

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  • Facebox adding commas to input

    - by Ed Woodcock
    I'm using a facebox to display a form inside a lightbox, nothing too exciting (just a couple of datepickers, some textboxes and a checkbox). However, I'm having issues with the postbacks, whenever I post back from the facebox it adds a ',' to the start of the input (so "rabbit" becomes ",rabbit") Now, I saw that there was the same issue with the modalpopup extender from the ajaxcontroltoolkit, so I assume it's a common issue. Can anyone either explain why this is happening, or tell me how to fix it? provide a decent way of fixing this? I have actually done it, and it works very nicely, but I don't really want to answer my own bounty question so someone else give it a go! Cheers, Ed EDIT See attached answer for a correct solution (I fixed this eventually but didn't want to ruin the bounty question so left the answer until afterwards).

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  • Linked List Design

    - by Jim Scott
    The other day in a local .NET group I attend the following question came up: "Is it a valid interview question to ask about Linked Lists when hiring someone for a .NET development position?" Not having a computer sciense degree and being a self taught developer my response was that I did not feel it was appropriate as I in 5 years of developer with .NET had never been exposed to linked lists and did not hear any compeling reason for a use for one. However the person commented that it is a very common interview question so I decided when I left that I would do some reasearch on linked lists and see what I might be missing. I have read a number of posts on stack overflow and various google searches and decided the best way to learn about them was to write my own .NET classes to see how they worked from the inside out. Here is my class structure Single Linked List Constructor public SingleLinkedList(object value) Public Properties public bool IsTail public bool IsHead public object Value public int Index public int Count private fields not exposed to a property private SingleNode firstNode; private SingleNode lastNode; private SingleNode currentNode; Methods public void MoveToFirst() public void MoveToLast() public void Next() public void MoveTo(int index) public void Add(object value) public void InsertAt(int index, object value) public void Remove(object value) public void RemoveAt(int index) Questions I have: What are typical methods you would expect in a linked list? What is typical behaviour when adding new records? For example if I have 4 nodes and I am currently positioned in the second node and perform Add() should it be added after or before the current node? Or should it be added to the end of the list? Some of the designs I have seen explaining things seem to expose outside of the LinkedList class the Node object. In my design you simply add, get, remove values and know nothing about any node object. Should the Head and Tail be placeholder objects that are only used to define the head/tail of the list? I require my Linked List be instantiated with a value which creates the first node of the list which is essentially the head and tail of the list. Would you change that ? What should the rules be when it comes to removing nodes. Should someone be able to remove all nodes? Here is my Double Linked List Constructor public DoubleLinkedList(object value) Properties public bool IsHead public bool IsTail public object Value public int Index public int Count Private fields not exposed via property private DoubleNode currentNode; Methods public void AddFirst(object value) public void AddLast(object value) public void AddBefore(object existingValue, object value) public void AddAfter(object existingValue, object value) public void Add(int index, object value) public void Add(object value) public void Remove(int index) public void Next() public void Previous() public void MoveTo(int index)

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  • How can I make a DateTimePicker display an empty string?

    - by brass-kazoo
    I would like to be able to display a DateTimePicker that has a default value of nothing, i.e. no date. For example, I have a start date dtTaskStart and an end date dtTaskEnd for a task, but the end date is not known, and not populated initially. I have specified a custom format of yyyy-MM-dd for both controls. Setting the value to null, or an empty string at runtime causes an error, so how can I accomplish this? I have considered using a checkbox to control the enabling of this field, but there is still the issue of displaying an initial value.. Edit: Arguably a duplicate of the question DateTimePicker Null Value (.NET), but the solution I found for my problem is not a solution for that question, so I think it should remain here for others to find..

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  • How important is W3C XHTML/CSS validation when finalizing work?

    - by Andrew G. Johnson
    Even though I always strive for complete validation these days, I often wonder if it's a waste of time. If the code runs and it looks the same in all browsers (I use browsershots.org to verify) then do I need to take it any further or am I just being overly anal? What level do you hold your code to when you create it for: a) yourself b) your clients P.S. Jeff and company, why doesn't stack overflow validate? :) EDIT: Some good insights, I think that since I've been so valid-obsessed for so long I program knowing what will cause problems and what won't so I'm in a better position than people who create a site first and then "go back and fix the validation problems" I think I may post another question on stack overflow; "Do you validate as you go or do you finish and then go back and validate?" as that seems to be where this question is going

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