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• Bash sourcing of functions in other languages

  - by ABach

  This is, perhaps, a silly question, but it's something that I've wondered about: is it possible to, say, define a Ruby/Python/Perl/etc. function in some file and then source it in Bash (to make it available anywhere in the current shell)? At the moment, I "source" scripts/functions in other languages by creating a bash alias that executes that script... But I wonder if it's possible for Bash to interpret those other functions directly? Thanks. :)

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• NHibernate: Mapping IList property

  - by Anry

  I have a table Order, Transaction, Payment. Class Order has the properties: public virtual Guid Id { get; set; } public virtual DateTime Created { get; set; } ... I added properties: public virtual IList<Transaction> Transactions { get; set; } public virtual IList<Payment> Payments { get; set; } These properties contain a record of tables [Transaction] and [Payment]. How to keep these lists in the database?

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• How to implement Template Inheritance (like Django?) in PHP5

  - by anonymous coward

  Is there an existing good example, or how should one approach creating a basic Template system (thinking MVC) that supports "Template Inheritance" in PHP5? For an example of what I define as Template Inheritance, refer to the Django (a Python framework for web development) Templates documentation: http://docs.djangoproject.com/en/dev/topics/templates/#id1 I especially like the idea of PHP itself being the "template language", though it's not necessarily a requirement. If listing existing solutions that implement "Template Inheritance", please try to form answers as individual systems, for the benefit of 'popular vote'.

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• Where is my mistake?

  - by Hakan

  I have table which is connected to datagridview and I would like to enter new data by using text boxes. I have following code but it gives me error. Will be appreciated if you help me. Dim meter As DataTable = Me.DataSet1.Tables.Item("tblmeters") Dim row As DataRow = meter.NewRow() row.Item("No") = Me.txtno.Text row.Item("Turnover") = Me.txtturnover.Text row.Item("Total Win") = Me.txttotalwin.Text row.Item("Games Played") = Me.txtgamesplayed.Text row.Item("Credit In") = Me.txtcreditin.Text row.Item("Bill In") = Me.txtbillin.Text row.Item("Hand Pay") = Me.txthandpay.Text row.Item("Date") = DateTime.Today.ToShortDateString meter.Rows.Add(row) Me.TblMeterTableAdapter.Update(Me.DataSet1.tblMeter) meter.AcceptChanges()

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• What happens to date-times and booleans when using DbLinq with SQLite?

  - by DanM

  I've been thinking about using SQLite for my next project, but I'm concerned that it seems to lack proper datetime and bit data types. If I use DbLinq (or some other ORM) to generate C# classes, will the data types of the properties be "dumbed down"? Will date-time data be placed in properties of type string or double? Will boolean data be placed in properties of type int? If yes, what are the implications? I'm imaging a scenario where I need to write a whole second layer of classes with more specific data types and do a bunch of transformations and casts, but maybe it's not so bad. If you have any experience with this or a similar scenario, what are your "lessons learned"?

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• Is C# fast enough for games

  - by Matt

  Will a game written in C# have any speed issues after long periods of play, like for 24 hours at a time? I'm specifically talking about a 2D RPG similar to old Final Fantasy or Dragon Quest games. I know that languages like Python will slow down too much, curious how C# would stand.

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• What is the equivalent of <composite-element> in Castle ActiveRecord?

  - by Daniel T.

  I have a TrackLog that has a collection of TrackPoints: public class TrackLog { public string Name { get; set; } public ISet<TrackPoint> TrackPoints { get; set; } } public class TrackPoint { public DateTime Timestamp { get; set; } public double Latitude { get; set; } public double Longitude { get; set; } } I'd like to map the track points as a collection of components, as this makes the most sense. According to the book NHibernate in Action, on page 187: Collections of components are mapped similarily to other collections of value type instances. The only difference is the use of <composite-element> in place of the familiar <element> tag. How would I do this using Castle ActiveRecord attributes?

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• how to write programs that they use advanced OpenType features?

  - by Sorush Rabiee

  How could I write a simple program using OpenType tables in order to dynamically render text? please answer in : assembly , C , C++ , C# , java or Python (and a little WPF:-) or introduce libraries of them. comments and answers about text rendering system of common Operating Systems, or designing text engines compatible with unicode 5.02 protocol are welcomed.

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• RubyCocoa, what's the point?

  - by totocaster

  I was wondering what's the point of using Ruby (or even Python) in Cocoa application development other that not learning Objective-C (which is pretty simple language and will not take to more than few days to learn). I'm new to this and I'm interested why people do this? What are Pros and Cons.

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• Can Stopwatch be used in production code?

  - by Adrian

  Hi, I need an accurate timer, and DateTime.Now seems not accurate enough. From the descriptions I read, System.Diagnostics.Stopwatch seems to be exactly what I want. But I have a phobia. I'm nervous about using anything from System.Diagnostics in actual production code. (I use it extensively for debugging with Asserts and PrintLns etc, but never yet for production stuff.) I'm not merely trying to use a timer to benchmark my functions - my app needs an actual timer. I've read on another forum that System.Diagnostics.StopWatch is only for benchmarking, and shouldn't be used in retail code, though there was no reason given. Is this correct, or am I (and whoever posted that advice) being too closed minded about System.Diagnostics? ie, is it ok to use System.Diagnostics.Stopwatch in production code? Thanks Adrian

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• What is difference between scripting languages and other languages

  - by Mirage

  I am really confused between different types of languages. Can any one guide what are diff types of languages or diff categories. Like some saying python is scripting langauge. Now what does that mean. Are other langueages like php , asp , java not scripting langauges

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• Qt QFileDialog input field - tab complete like shell

  - by mleep

  I've got a basic PyQt QFileDialog file browser goin in Python, Kubuntu. My issue is I would like the "tab key" in the file input to act as tab-complete does in a shell. Is there any way to accomplish this?

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• Would an ORM have any way of determining that a SQLite column contains date-times or booleans?

  - by DanM

  I've been thinking about using SQLite for my next project, but I'm concerned that it seems to lack proper datetime and bit data types. If I use DbLinq (or some other ORM) to generate C# classes, will the data types of the properties be "dumbed down"? Will date-time data be placed in properties of type string or double? Will boolean data be placed in properties of type int? If yes, what are the implications? I'm envisioning a scenario where I need to write a whole second layer of classes with more specific data types and do a bunch of transformations and casts, but maybe it's not as bad as I fear. If you have any experience with this or a similar scenario, how did you handle it?

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• Should BASIC continue to be recommended for non-programmers and beginners?

  - by Casey

  I just came across a new BASIC implementation for Google Android application called Simple. You can read about it here: http://google-opensource.blogspot.com/2009/07/programming-made-simple.html Clearly, a lot of time and effort has been recently put into enabling this functionality for Android. Should the software industry continue to encourage non-programmers into learning BASIC, or are modern languages like C#, Python, Ruby more appropriate at this time?

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• Having trouble with a small example from school

  - by Kalec

  The example is from a course, it's for comparing two objects in java: public class Complex { ... public boolean equals (Object obj) { if (obj instanceof Complex) { // if obj is "Complex" (complex number) Complex c = (Complex) obj // No idea return (real == c.real) && (imag == c.imag); // I'm guessing real means [this].real } return false; } } So, my question is: "what does this: Complex c = (Complex) obj actually mean" ? Also I've worked with python and c++, java is new for me.

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• What's your experience developing on Google App Engine?

  - by MrDatabase

  Is GQL easy to learn for someone who knows SQL? How is Django/Python? Does App Engine really make scaling easy? Is there any built-in protection against "GQL Injections"? And so on... I'd love to hear the not-so-obvious ups and downs of using app engine. Cheers!

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• Sqlite: CURRENT_TIMESTAMP is in GMT, not the timezone of the machine

  - by BrianH

  I have a sqlite (v3) table with this column definition: "timestamp" DATETIME DEFAULT CURRENT_TIMESTAMP The server that this database lives on is in the CST time zone. When I insert into my table without including the timestamp column, sqlite automatically populates that field with the current timestamp in GMT, not CST. Is there a way to modify my insert statement to force the stored timestamp to be in CST? On the other hand, it is probably better to store it in GMT (in case the database gets moved to a different timezone, for example), so is there a way I can modify my select SQL to convert the stored timestamp to CST when I extract it from the table? Thanks in advance!

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• Are there any strongly typed scripting languages?

  - by George Edison

  I am wondering if there are any strongly typed scripting languages. Python, JavaScript, etc. are great languages, but they are (to a certain degree) loosely typed. I am just wondering if anyone knows of any strongly typed scripting languages. And by scripting, I mean a language whose interpreter can be embedded in a C++ application.

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• Current Time Not working in WPF DLL

  - by Anu

  HI, I making one DLL in WPF,C# and im using it in VC++.In that DLL, ihave one textblock to display current time,But when i run the WPF application as WIndows application it shows current time correctly and also updated with new timings.But when i use it as Dll in VC++ applcation,the current time is not get updating.It shows the time when the applcaiton is loaded.thats all.Its not get updated. Code: public Button() { InitializeComponent(); DispatcherTimer dispatcherTimer = new DispatcherTimer(); dispatcherTimer.Tick += new EventHandler(dispatcherTimer_Tick); dispatcherTimer.Interval = new TimeSpan(0, 0, 1); dispatcherTimer.Start(); } private void dispatcherTimer_Tick(object sender, EventArgs e) { DataContext = DateTime.Now.ToString("g"); } XAML: <TextBlock Margin="0,6,211,0" Name="textBlock1" Text="{Binding}"/>

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• problem when I save the text of an htmlEditor ?

  - by ahmed

  Hello guys , I have a problem when I save the content of a htmlEditor it takes the first line of the message. For example I enter text text text text text text After entering the text when i retrieve it I just get the first line of the message . Send message code HtmlEdit1.Lines.Add(" <br />") HtmlEdit1.Lines.Add(" <br />") html_txt = "" For I = 0 To HtmlEdit1.Lines.Count - 1 html_txt = html_txt + HtmlEdit1.Lines(I).ToString() Next mydt = DateTime.Now Then inserting the record in SQL insert into MESSAGES (SRNO, ID, subject)values ( @P1, @P2, @P3) Finally updating the grid.

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• How are you using IronPython?

  - by Will Dean

  I'm keen to drink some modern dynamic language koolaid, so I've believed all the stuff on Michael Foord's blog and podcasts, I've bought his book (and read some of it), and I added an embedded IPy runtime to a large existing app a year or so ago (though that was for someone else and I didn't really use it myself). Now I need to do some fairly simple code generation stuff, where I'm going to call a few methods on a few .net objects (custom, C#-authored objects), create a few strings, write some files, etc. The experience of trying this leaves me feeling like the little boy who thinks he's the only one who can see that The Emperor has no clothes on. If you're using IronPython, I'd really appreciate knowing how you deal with the following aspects of it: Code editing - do you use the .NET framework without Intellisense? Refactoring - I know a load of 'refactoring' is about working around language-related busywork, so if Python is sufficiently lightweight then we won't need that, But things like renames seem to me to be essential to iteratively developing quality code regardless of language. Crippling startup time - One of the things which is supposed to be good about interpreted languages is the lack of compile time leading to fast interactive development. Unfortunately I can compile a C# application and launch it quicker than IPy can start up. Interactive hacking - the IPy console/repl is supposed to be good for this, but I haven't found a good way to take the code you've interactively arrived at and persist it into a file - cut and paste from the console is fairly miserable. And the console seems to hold references to .NET assemblies you've imported, so you have to quit it and restart it if you're working on the C# stuff as well. Hacking on C# in something like LinqPad seems a much faster and easier way to try things out (and has proper Intellisense). Do you use the console? Debugging - what's the story here? I know someone on the IPy team is working on a command-line hobby-project, but let's just say I'm not immediately attracted to a command line debugger. I don't really need a debugger from little Python scripts, but I would if I were to use IPy for scripting unit tests, for example. Unit testing - I can see that dynamic languages could be great for this, but is there any IDE test-runner integration (like for Resharper, etc). The Foord book has a chapter about this, which I'll admit I have not yet read properly, but it does seem to involve driving a console-mode test-runner from the command prompt, which feels to be an enormous step back from using an integrated test runner like TestDriven.net or Resharper. I really want to believe in this stuff, so I am still working on the assumption that I've missed something. I would really like to know how other people are dealing with IPy, particularly if they're doing it in a way which doesn't feel like we've just lost 15 years'-worth of tool development.

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• Is there something like Sympy for Java?

  - by Shane Fulmer

  I'm looking for a symbolic math library for Java along the lines of sympy for Python. Does anyone know of anything? Thanks!

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• How to generate Function caller graphs for JavaScript and ActionScript?

  - by Jeremy Rudd

  I like the way Doxygen combines with Graphviz dot to generate function caller graphs. I'd like this functionality for other languages as well, apart from the basics that Doxygen supports (C++, C, Java, Objective-C, Python, VHDL, PHP, C#). I'm currently looking for tools that support JavaScript, ActionScript 2 and ActionScript 3/Flex. I'm also interested in tools that have a wider language support than Doxygen. Is there any way to get function caller graphs for any other languages?

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• Mysql: Convert DB from local time to UTC

  - by Joernsn

  I need to convert an existing (datetime fields) db from local time ut UTC. The values are stored ad datetimes on a server with time zone CET (+1) (with summertime +2). When selecting data I use UNIX_TIMESTAMP(), which magically compensates for everything, ie, time zone shift and dst (if i've read the docs right). I'm moving the db to a new server with UTC as system time. Simply subtracting -1 H won't work, as summer time is +2. Any ideas for a clever way to do this? (using sql or some script lang)

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• Rails 3 time output

  - by Oluf Nielsen

  Hi, I'm now working on my output of the feeds I'm taking in from some site. What I'm currently doing is Time, and i want it to be displayed in a maybe, little be special way.. like this.. today, 14:12 yesterday, 15:34 27/12, 15:24 i have this in my code = news.entry_published.strftime("%d/%m, %H:%M") That gives me an error saying undefined method `strftime' for "2010-12-30 19:26:00.000000":String And it dosn't do what i want with the days.. Edit: - @date = DateTime.strptime(news.entry_published, "%Y-%m-%d %H:%M:%S") = @date.strftime("%d/%m, %H:%M") Now works, and gives this output 30/12, 19:26 But i still have to check if it is today, yesterday or just another day. Cheers, Oluf.

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