Inheritance vs. common (same named and typed) columns?
- by Ivan
What model of these is better? A or B?
Considering I have more common columns and many more relations.
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How to query an Entity Framework entities container for objects of derived entity classes?
- by Ivan
I have a complex inheritance structure in my data model. A majority of classes in my model (which is designed in VS 2010 with a DB generated by it after) are derived from 3 basic classes. And only these 3 classes can be found among the context members. How do I use all the derived classes at all?Read the article
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How to random specific letters ?
- by Ivan
I've started writing some JAVA code and now I want to get a random letter from list of letters given so what should I use for this.Read the article
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Is there a suitable public license for my needs (see body)?
- by Ivan
I would like to license my project with the flowing conditions: Personal and educational usage of the program and its source codes is to be free. In case of publishing of derivative works the original work and author (me) must be mentioned (incl. textual link to my website in a not-very-far-hidden place) and the derivative work must have…Read the article
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How do I close SQL Server output subwindow which appears when I run a T-SQL script from inside Visua
- by Ivan
How do I close SQL Server output subwindow which appears when I run a T-SQL script from inside Visual Studio 2010? It neither has nay kind of control buttons like [x] or[-=] visible, nor any other obvious means of closing.Read the article
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GWT: Select a TreeItem with right click
- by Ivan
I'm capturing a right click event to show a context menu. What I haven't been able to figure out, is how to make the right click actually select the TreeItem, prior to showing of context menu. All help is appreciated. private Tree tree = new Tree() { @Override public void onBrowserEvent(Event event) { if (event.getTypeInt()…Read the article
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How do I handle TODO comments in VisualStudio 2010?
- by Ivan
I'd like Visual Studio to list all lines having "TODO: " in their beginning (usually after a comment sign which may vary depending on the file type) that can be found in any textual file in solution (may it be C#, VB, F#, T-SQL, ASPX, XAML or just TXT) in a special panel showing what's written in the line right to "TODO: ", project…Read the article
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Using ADO.NET Entities LINQ Provider to model complex SQL Queries?
- by Ivan Zlatanov
What I find really powerful in ADO.NET Entities or LINQ to SQL, is the ability to model complex queries. I really don't need the mappings that Entities or LINQ to SQL are doing for me - I just need the ability to model complex expressions that can be translated into T-SQL. My question is - am I abusing too much? Can I use the Entity…Read the article
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What's a better choice for SQL-backed number crunching - Ruby 1.9, Python 2, Python 3, or PHP 5.3?
- by Ivan
Crterias of 'better': fast im math and simple (little of fields, many records) db transactions, convenient to develop/read/extend, flexible, connectible. The task is to use a common web development scripting language to process and calculate long time series and multidimensional surfaces (mostly selectint/inserting sets of floats…Read the article
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Two entities with @ManyToOne should join the same table
- by Ivan Yatskevich
I have the following entities Student @Entity public class Student implements Serializable { @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; //getter and setter for id } Teacher @Entity public class Teacher implements Serializable { @Id @GeneratedValue(strategy = GenerationType.AUTO) …Read the article
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When to use memberEnd and when navigableOwnedEnd in an UML class diagram?
- by Ivan
I've download a trial of Altova UModel and am starting using UML. As a practical beginning I am modelling a personal information manager application, which includes a web bookmark managing. A Bookmark can belong to many (or no) Tags at once and a Tag can contain many (or no if all the bookmarks it contained were deleted)…Read the article
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'Auto' value in binding property 'width'
- by Ivan
Must attach to the property Width, what I'm doing this: <ColumnDefinition Width="{Binding Path=TabPanelWidth, RelativeSource={RelativeSource TemplatedParent}}" /> - public float TabPanelWidth { get {return (float) GetValue (TabPanelWidthProperty);} set {SetValue…Read the article
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Is there a good (flexible, feature-rich, KISS, modern) free C# framework for drawing charts (just ou
- by Ivan
I need to visualize some scientific calculations. I generally prefer reusing code if there is already a good available instead of inventing wheels each time, that's why I am asking. I need a C# code to draw charts (just outputting a bitmap is ok) of 2d (y=f(x)) and 3d (z=f(x,y)) digital data sets (where…Read the article
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Android Internet permission and Google Play filtering
- by Ivan
I added <uses-permission android:name="android.permission.INTERNET" /> to my manifest in order to have access to Internet, but this is not a main function of my app. So, I don't want to get filtered in Google Play because of this. There is no matching <uses-feature> for this, so my…Read the article
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Conversion from Access 2010 to 2007
- by ivan
Is there a way to use a database created with Access 2010 in 2007? I keep getting the "unrecognized format" error...Read the article
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Iterating over each line of ls -l output
- by Ivan
I want to iterate over each line in the output of ls -l /some/dir/* Right now I'm trying: for x in ls -l $1; do echo $x done, however this iterates over each element in the line seperately, so i get -r--r----- 1 ivanevf eng 1074 Apr 22 13:07 File1 -r--r----- 1…Read the article
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Better use a tuple or numpy array for storing coordinates
- by Ivan
Hi, I'm porting an C++ scientific application to python, and as I'm new to python, some problems come to my mind: 1) I'm defining a class that will contain the coordinates (x,y). These values will be accessed several times, but they only will be read after the class instantiation. Is it better…Read the article
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What to read as a good intro and quickstart to aspect-oriented programming and metaprogramming?
- by Ivan
As I've found myself repeating myself a lot, writing very similar queries and classes for different entities (despite of doing strong object and relational normalisation), etc, I've came to an Idea that I could and should automate the most of this and write an engine which will compile simple…Read the article
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Can I stop UIImageView Animation at last frame?
- by Ivan
Hello, I have an animation using a UIImageView myAnimatedView.animationImages = myImages; myAnimatedView.animationDuration = 1; myAnimatedView.animationRepeatCount = 1; [myAnimatedView startAnimating]; How can I tell to animation to stop at the last frame or to be visible last frame of…Read the article
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Looking for framework for plotting scientific data: 2d/3d ...
- by Ivan
I need to visualize some scientific calculations. I generally prefer reusing code if there is already a good available instead of inventing wheels each time, that's why I am asking. I need a C# code to draw charts (just outputting a bitmap is ok) of 2d (y=f(x)) and 3d (z=f(x,y)) digital…Read the article
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What are PHP 5.2 settnigs which affect compatibility with old code (developed for PHP 4 and 3)?
- by Ivan
What are PHP 5.2 settnigs which affect compatibility with old code (developed for PHP 4 and 3)? A web application using XTemplate 0.2.4-2 (officially meant for 3.0.11) works fine on one server running PHP 5.2 but works incorrect (seems that the form can't be submitted or processed…Read the article
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Should I use Enumeration or Class stereotype in UML to represent a type directory table?
- by Ivan
Let's take 2 UML class model entities: One represents an actual Order and another represents an Orede Type. Any Order corresponds to one Type. A 2-way-naviglabe many Orders to one Type relation is meant. Order Type instances are, for example, "Request availability", "Request…Read the article
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Is there anything similar to WPF and MVVM in Java world?
- by Ivan
Is there anything similar to WPF and MVVM in Java world?Read the article
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How to develop a Jquery plugin to find the first child that match with a selector?
- by Ivan
I'm trying to make a Jquery plugin (findFirst()) to find the first child with a given characteristics (something in the middle of the find() and children() functions. For instance, given this markup: <div id="start"> <div> <span>Hello…Read the article
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Do you know of a good F# and C# interop example available?
- by Ivan
I am going to write a C# WinForms application which will run a long data-crunching task in a BackgroundWorker, show progress in a ProgressBar and have buttons to start, pause, resume and cancel the operation. I'd like to write the calculation in F#. Do you know of…Read the article
