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  • how to write re-usable views in django?

    - by rz
    These are the techniques that I use regularly to make my views reusable: take the template_name as an argument with a default take an optional extra_context which defaults to empty {} right before the template is rendered the context is updated with the extra_context for further re-usability, call any callable in extra_context.values() whenever the view deals with a queryset, there is a queryset argument with a default whenever the view needs a particular object from the ORM, it attempts to fetch it using any "id" parameter in several ways (e.g. as a slug, as a database id) (this may be a bad practice...) First, Should I add anything to my list? Should I remove anything from my list? The items accommodates a large number of cases. However, whenever an app extends a model of another in some way (e.g. adding a field or changing the behavior in some way) I end up writing my own views and only reusing the model. Is this normal?

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  • Work-around for PHP5's PDO rowCount MySQL issue

    - by Steven Surowiec
    I've recently started work on a new project using PHP5 and want to use their PDO classes for it. The problem is that the MySQL PDO Driver doesn't support rowCount() so there's no way to run a query and then get the number of affected rows, or rows returned, which is a pretty big issue as far as I'm concerned. I was wondering if anyone else has dealt with this before and what you've done to work around it. Having to do a fetch() or fetchAll() to check if any rows were affected or returned seems like a hack to me, I'd rather just do $stmt-numRows() or something similar.

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  • Why use MVVM???

    - by LnDCobra
    Okay, I have been looking into MVVM pattern, and each time I have previously tried looking into it, I gave up for a number of reasons: Unnecessary Extra Long Winded Coding No apparent advantages for coders (no designers in my office. Currently only myself soon to be another coder) Not a lot of resources/documentation of good practices! (Or at least hard to find) Cannot think of a single scenario where this is advantageous. I'm about to give up on it yet again, and thought I'd ask to see if someone answer the reasons above. I honestly can't see an advantage of using this for a single/partner coding. Even in complex projects with 10's of windows. To me the DataSet is a good enough view and binding like in the answer by Brent following question

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  • SQL Loop over a family tree

    - by simon831
    Using SQL server 2008. I have a family tree of animals stored in a table, and want to give some information on how 'genetically diverse' (or not) the offspring is. In SQL how can I produce sensible metrics to show how closely related the parents are? Perhaps some sort of percentage of shared blood, or a number of generations to go back before there is a shared ancestor? AnimalTable Id Name mumId dadId select * from AnimalTable child inner join AnimalTable mum on child.[mumId] = mum.[Id] inner join AnimalTable dad on child.[dadId] = dad.[Id] inner join AnimalTable mums_mum on mum.[mumId] = mums_mum.[Id] inner join AnimalTable mums_dad on mum.[dadId] = mums_dad.[Id] inner join AnimalTable dads_mum on dad.[mumId] = dads_mum.[Id] inner join AnimalTable dads_dad on dad.[dadId] = dads_dad.[Id]

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  • ASP.net displaying data from SQL data source

    - by c11ada
    hey all, im using linq2SQL to grab information from my SQL database, i have a gridview which shows all the top level information, in this case a list of groups (i.e admin, users and so on) when a user clicks say the admin group, i want to be able to show each member in that group, i have the following code which grabs the information from the database, DataClassesDataContext dc = new DataClassesDataContext(); GridViewRow row = GridView1.SelectedRow; var query1 = from p in dc.Users where p.groups.GroupID == Int32.Parse(row.Cells[1].Text) select new { p.Name, p.Address, p.Contact Number, p.Bio, }; i no i can use gridview again to display the results of the query, but this doesnt really look nice as it shows too much information at one, how would i go about having some sort of display which will show just one user at a time giving me the chance to click next and back ? thanks

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  • How to convert a PCRE to a POSIX RE?

    - by David M
    This interesting question http://stackoverflow.com/questions/2837267/ concerned how to do a negative look-ahead in MySQL. The poster wanted to get the effect of Kansas(?! State) because MySQL doesn't implement look-ahead assertions, a number of answers came up the equivalent Kansas($|[^ ]| ($|[^S])| S($|[^t])| St($|[^a])| Sta($|[^t])| Stat($|[^e])) The poster pointed out that's a PITA to do for potentially lots of expressions. Is there a script/utility/mode of PCRE (or some other package) that will convert a PCRE (if possible) to an equivalent regex that doesn't use Perl's snazzy features? I'm fully aware that some Perl-style regexes cannot be stated as an ordinary regex, so I would not expect the tool to do the impossible, of course!

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  • 8-direction path finding algorithm

    - by frinkz
    I'm having trouble finding the right pathfinding algorithm for some AI I'm working on. I have players on a pitch, moving around freely (not stuck to a grid), but they are confined to moving in 8 directions (N NE E etc.) I was working on using A*, and a graph for this. But I realised, every node on the graph is equally far apart, and all the edges have the same weight - since the pitch is rectangular. And the number of nodes is enormous (being a large pitch, with them able to move between 1 pixel and another) I figured there must be another algorithm, optimised for this sort of thing?

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  • Facebook photo_tag fql query problem?

    - by Simon
    Hello I have a problem search through the photo tag that facebook user got tagged. SELECT pid FROM subject = uid uid = are the friend of the logged in user. I have received a list of tagged for particular user since I wanted to count how many he/she being tagged, I counted on my server code after retreive an XML from facebook. I can see some of my friends got tagged 60, when I looked at his/her profiles, he/she has more than 60 around 200 tagged photos. Did I miss anything in my query? I created a dummy account and upload a photo including tagging but I receive the right number of tagged photos of his.

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  • Excel VBA: NetworkDays Error 2015

    - by Martin
    Hi All, I have the this bit of code in a VBA class which is to workout the number of days between a property of the class (a date) and today’s date. Dim EmailDate As Date EmailDate = Me.Email.DateReceived Debug.Print EmailDate, Date Debug.Print NetworkDays(EmailDate), Date, Range("BankHolidays")) When I run it I get the following output 23/04/2010 19/05/2010 [GetMacroRegId] 'NETWORKDAYS' < [GetMacroRegId] 'NETWORKDAYS' -> '699990072' > Error 2015 I have tested it in a module, using dummy data, and get the correct answer. Can anyone see why this would be giving an error in a class? I have referenced atpvbaen.xls. Edit: I have found that when I run the code through a menu option I have created on the menu bar it fails, but when I run it via a button or through the VB Editor it works fine. Looks like it is something to do with the menu. Thanks, Martin

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  • How long should it take a senior developer to solve FizzBuzz during an interview?

    - by Jim McKeeth
    Assuming: Typical interview stress levels (I am watching) Using familiar IDE and program language (their choice on their PC!) Given adequate explanation and immediate answers to questions Able to compile code and check answers / progress Claims to be a senior level programmer How long should it take an interviewee to answer FizzBuzz correctly? Edit: FizzBuzz: Write a program that prints the numbers from 1 to 100. But for multiples of three print "Fizz" instead of the number and for the multiples of five print "Buzz". For numbers which are multiples of both three and five print "FizzBuzz". Edit: It isn't so much that if they take more then X minutes they are disqualified, but I am curious if I should just cut them loose after they work on it for half hour.

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  • How to pre-process CSV data for FasterCSV?

    - by Katherine Chalmers
    We're having a significant number of problems creating a bulk upload function for our little app. We're using the FasterCSV gem to upload data to a MySQL database but he Faster CSV is so twitchy and precise in its requirements that it constantly breaks with malformed CSV errors and time out errors. The csv files are generally created by users' pasting text from their web sites or from Microsoft Word docs so it is not reasonable to expect that there will never be odd characters like smart quotes or accents in the data. Also users aren't going to be readily able to identify whether their data is perfect enough for FasterCSV or not. We need to find a way to fix it for them automatically. Is there a good way or a reliable tool for pre-processing CSV data to fix any nits in the data before having the FasterCSV gem process it?

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  • jQuery append value to html input depending on other input

    - by werm
    Ok, the title is a bit confusing, but here's my predicament. I've made a web app to track UPS packages internally at work. Currently, you input the tracking number and then select the city it was shipped from. All tracking numbers from an account start with the same X amount of numbers. So if someone entered "1Z8473..." into one input, "Houston, TX" would automatically be entered into the next input. Is this a difficult thing to pull off? Where would I begin?

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  • Help on QStackedWidget

    - by Surjya Narayana Padhi
    Hi Geeks, I am using a QStackedWidget on my mainWindow. The firstPageWidget on stackedWidget contains 3 buttons. Now If I will press the first button on firstPage, I want the stackedWidget show the 2nd Page widget. Following are the details I tried to connect like this in my mainwindow connect(firstPageWidget->button1,SIGNAL(clicked()),stackWidget,SLOT(setCurrentIndex(int))); Now I want to know how to pass the value of index number to stackWidget to set currentIndex? If my question is not much clear please tell me I will explain more.

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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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  • Verify my form workflow

    - by Shackrock
    I have a form, with some sensitive info (CC numbers). My work flow is: One page to take all form items Upon submission, values are validated. If all is well, all data is stored in a session variable, and the page reloads and displays this info from the session variable. If everything is ok on the review page, the user clicks submit and the session variable is sent to another form for processing (sending payment). Upon success, the session is destroyed. Upon failure (bad CC number, for example) - the user is sent back to the form, with all of the fields filled in just like before, so that they can check for errors and try again (session is NOT destroyed). Does anyone see anything wrong with this, from a security or best practices stand point? UPDATE I'm thinking I can get rid of a step - storing the info in a session EVER. Just have a one page checkout, no review page... makes sense.

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  • Practical non-Turing-complete languages?

    - by Kyle Cronin
    Nearly all programming languages used are Turing Complete, and while this affords the language to represent any computable algorithm, it also comes with its own set of problems. Seeing as all the algorithms I write are intended to halt, I would like to be able to represent them in a language that guarantees they will halt. Regular expressions used for matching strings and finite state machines are used when lexing, but I'm wondering if there's a more general, broadly language that's not Turing complete? edit: I should clarify, by 'general purpose' I don't necessarily want to be able to write all halting algorithms in the language (I don't think that such a language would exist) but I suspect that there are common threads in halting proofs that can be generalized to produce a language in which all algorithms are guaranteed to halt. There's also another way to tackle this problem - eliminate the need for theoretically infinite memory. Once you limit the amount of memory the machine is allowed, the number of states the machine is in is finite and countable, and therefore you can determine if the algorithm will halt (by not allowing the machine to move into a state it's been in before).

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  • LNK1106 with big binary resource

    - by E Dominique
    I have a rather huge .dat-file (896MB) included as a BIN resource in my project. Now I get a LNK1106 link error ("fatal error LNK1106: invalid file or disk full: cannot seek to 0x382A3920".) I use Visual Studio 2005 under Windows XP, and have tried on a 4GB RAM machine with high Virtual Memory settings and lots of disk space. I have tried a number of different optimization flags, but to no avail. Does anyone have a clue? EDIT: I have narrowed it down to a specific size of the compiled resource. If the .res file is 544078588 bytes (about 518.9MB) or larger, the error occurs. If it is smaller it works just fine. Still no solution, though...

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  • iPhone: UITableView Becomes Invisible after Changing the Data it Displays

    - by Alexander Shemshurenko
    Hi I have application with a TabBar that controls several views. In one view, I control connections to different servers. Each server provides a different set of items. I display these items in UITableView on another view. The problem is that the tableview displays OK the first time but if I go back to view number one and change the server, thereby changing the list of items that should be displayed in tableview, the tableview becomes invisible for some reason. If I tap on the screen in the place where it should be, it becomes visible again. I create table view like this UITableView * aTableView = [[UITableView alloc] initWithFrame:CGRectMake(X,Y,Width,Height) style:UITableViewStyleGrouped]; [[self view] addSubview:aTableView]; aTableView.dataSource = self; Ive tried to call reloadData and setNeedsDisplay in viewWillAppear of the UIViewController that hosts this tableview but without success. Any advice? Thanks

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  • Trying to inherit variable "text" from Form 1 for use in Form 2????

    - by JB
    I have a Form 1 as listed below, im trying to inherit the variable text from it so i can compare is value in an if statement so i can output the file specified for that id number in Form 2...is this possible??? Form 1, where variable is being used: public void button2_Click(object sender, System.EventArgs e) { timer1.Enabled = true; string text = textBox1.Text; Mainform = this; this.Hide(); } Form 2 where im trying to use the variable: if (text == "900456318") { System.Diagnostics.Process.Start("C:\\Users\\Joshua Banks\\Desktop\\Downtown_atlanta_night"); } }

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  • How to use MySql date_add in Nhibernate?

    - by jalchr
    This really puzzled for hours, I searched all over the internet, but got no working solution. Can someone point where the problem is ... thanks ! I created my own dialect class public class MySQLDialectExtended : MySQLDialect { public MySQLDialectExtended() { RegisterFunction("date_add_interval", new SQLFunctionTemplate(NHibernateUtil.Date, "date_add(?1, INTERVAL ?2 ?3)")); } } Then I try to use it as follows: query.Append( " ( date_add_interval(D.ApprovalDate, 1, YEAR) < current_timestamp() < date_add_interval(D.RenewalDate, -1, YEAR) )"); It fails with following exception: NHibernate.Hql.Ast.ANTLR.QuerySyntaxException : Exception of type 'Antlr.Runtime.NoViableAltException' was thrown. near line 1, column 677 where the column number is at the end of the first 'YEAR' word. Edit: here is my configuration <property name="dialect">MyCompanyName.MySQLDialectExtended, MyCompanyName</property> <property name="hbm2ddl.keywords">none</property>

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  • Creating a subscription based website in ASP.NET

    - by DotnetDude
    I'd like to update my website to make it subscription based. It's a ASP.NET Web forms project. I am looking for the following functionality: Ability to have users sign up for different plans (Gold, Premium etc) Ability to have users upgrade / downgrade to and from plans Ability to hook this up to a Payment processor Ability to have a credit based system (User buys x credits for $y) as an alternative to plans in (1) Most of this functionality (if not all) is supported by a large number of websites which makes me think I can leverage on an existing framework instead of re-inventing the wheel. Any thoughts?

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  • Fluent-NHibernate - Component property attributes ignored by Convention

    - by BobTodd
    I have a component with a number of properties that have various attributes Normally when these attributes are added to a plain old domain object they are picked up by my custom AttributeConventions. For the Component properties they are not. Is there some extra wiring needed for these? e.g. public class Component { [Length(Max=50)] public virtual string Name {get; set;} } public class MyClass { public virtual Component Component {get; set;} [Length(Max=50)] public virtual string Color {get; set;} } I get a table MyClass with columns Color & ComponentName Color is an nvarchar(50) whilst ComponentName is an nvarchar(255) (the default)

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  • Get children count via HQL

    - by Thomas Lötzer
    Hi, I have a one-to-many mapping between a parent entity and child entities. Now I need to find the number of children associated with each parent for a list of parents. I am trying to do this with HQL but I am not sure how I can get the list of parents in there. Also, I don't know how I can return the entity itself and not just its ID. My current HQL query is: select new map(parent.id as parentId, count(*) as childCount) from Parent parent left join parent.children children group by parent.id but this only returns the ID and does not filter on specific parents. EDIT Based on Pascal's answer I have modified the query to select new map(parent as parent, count(elements(parent.children)) as childCount) from Parent parent group by parent That does work, but is prohibitively slow: 30 seconds instead of 400 ms on the same database.

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  • Too many open files error in Glassfish3 while using https listener

    - by a1ex07
    I have a problem running webservice that requires https connection(Glassfish3). After running for a while, it eventually crashes. Log file show "Failed to load keystore type JKS with path ....config/keystore.jks due to ...config/keystore.jks (Too many open files)". lsof shows that a number of open files are constantly increasing (among others, I noticed that there are many files with type 'sock' and undefined protocol that never get closed). I tried changing the limit of open files, but it resulted in a longer time before crashing... I blamed the webservice, but everything works fine if the application doesn't require confidential protocol. Did I miss anything in http listener configuration ? Or it is rather an application error? Thanks in advance

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  • Real average filesize in a set of files...

    - by JD
    Hi, I have an apparently "simple" problem but I can't find the solution for some reason... I have n millions files of different sizes and I want to find the average filesize. To simplify it, I grouped them in multiples of 16KB. < 16 KB = 18689546 files < 32 KB = 1365713 files < 48 KB = 1168186 files ... Of course, the simple (total_size / number of files) does not work. It gives an average of 291KB... What would be the algorithm to calculate the real average...? Thx, JD

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