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• Alternatives of Datatable

  - by mavera

  In my web application, I have a dynamic query that returns huge data to datatable, and this query is often recalled with different parameters. So database is exhausted. I want to get all record with no parameters to an object, and perform queries (may be with linq) on this object. So database will not be exthausted. Which objects can be used instead of datatable?

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• Is it a good idea to define a class within a class in Python?

  - by rmh

  I've sometimes seen code like this: class Something(object): class Else(object): def __init__(self): pass def __init__(self): # Do something with self.Else... pass Is it a good idea to define classes inside related classes? Is this an acceptable way to group related code?

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• How to pass non-fatal warnings from a library

  - by wRAR

  A library function parses a file and returns an object. If a parser encounters unknown data, missing values etc., it shouldn't throw an exception and stop parsing (because this is not fatal), but there should be a way to pass information about these things to a caller (so that warnings can be displayed in the UI, for example). How can these warning be returned? I'm thinking of passing a callback function/object into the library, are there any other possible solutions?

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• .htaccess & mod_rewrite for passing GET parameters

  - by Joel Alejandro

  Currently I use this to pass GET parameters on an "elegant" way: RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^([^/]*)/$ index.php?module=$1 [L] RewriteRule ^([^/]*)/([^/]*)/$ index.php?module=$1&object=$2 [L] RewriteRule ^([^/]*)/([^/]*)/([^/]*)/$ index.php?module=$1&object=$2&submodule=$3 [L] This works great for 3 parameters max., (and I'm sure it's seriously ugly). Any way to do the same thing, for n-paremeters?

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• Reflection: different ways to retrieve property value

  - by jules

  I'm retrieving an IEnumerable list of properties via following code: BindingFlags bindingFlag = BindingFlags.Instance | BindingFlags.Public; var dataProperties = typeof(myParentObject).GetProperties(bindingFlag); Then I'm iterating through the list and retrieving the value for each property. I've come across two different approaches to doing this, and just wondered what the difference is between them: 1) object propertyValue = property.GetGetMethod().Invoke(myObject, null); 2) object propertValue = property.GetValue(myObject, null)

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• Is there any sql interpreter for objects?

  - by Behrooz

  Is there any interpreter that takes a string or even a custom object as input and execute it on my datasource? I cannot use linq to object because query always changes and the report i'm working on, has about 6000 queries which i can reduce to 9 if i find some tool doing that for me. Opensource is very applicable. thanks in advance.

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• Why doesn't HashTable.Contains() just simply return false if it is passed a null?

  - by Nate Pinchot

  I understand why passing a null to HashTable.Contains() doesn't work, but I don't understand what the point of it throwing an ArgumentNullException is - instead of just simply returning false? What is the benefit of throwing the exception (other than to make me do null checks before calling .Contains())? Caused By [System.ArgumentNullException] Key cannot be null. Parameter name: key at System.Collections.Hashtable.ContainsKey(Object key) at System.Collections.Hashtable.Contains(Object key)

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• Objective C - Parse NSData

  - by EZFrag

  I have the following data inside an NSData object: <00000000 6f2d840e 31504159 2e535953 2e444446 3031a51b 8801015f 2d02656e 9f110101 bf0c0cc5 0affff3f 00000003 ffff03 I'm having issues parsing this data. This data contains information which is marked by tags Tag 1 is from byte value 0x84 to 0xa5 Tag 2 is from byte value 0xa5 to 0x88 Tag 3 is from byte value 0x88 to 0x5f0x2d Tag 4 is from byte value 0x5f0x2d to 0x9f0x11 How would I go about to get those values from the NSData object? Regards, EZFrag

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• How do I know if an input sting is a method name of a specific class?

  - by Itay Moav

  Inside an object, I get a string and I have to know if there is a method with the same name in the current object I am in. How do I do that?

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• C# - Does foreach() iterate by reference?

  - by sharkin

  Consider this: List<MyClass> obj_list = get_the_list(); foreach( MyClass obj in obj_list ) { obj.property = 42; } Is 'obj' a reference to the corresponding object within the list so that when I change the property the change will persist in the object instance once constructed somewhere?

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• Generate sample XML from composite hierarchical structure

  - by Jevgenij Nekrasov

  Let's say I have composite hierarchical structure. Each object in the structure has child collection of the same objects. Each object has XPath property, which stores the exact xpath to the element inside XML file. Right now I am trying to create an extension, which can generate XML string from that hierarchical structure, but first I want to make some sort of research what is the most efficient way to do that? ant what is the easiest way?

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• ASP.NET 'Session.Remove(key)' v/s 'Session(key) = nothing'

  - by Whiskey-Tango-Foxtrot

  I've seen developers use two approaches when they are done with a session object. 1) Session.Remove(key) 2) Session(key) = nothing What is the better approach of the two above? Does Session.Remove dispose the object stored automatically? Does the second approach depend on the garbage collector to actually free up the memory? Thanks.

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• When should I implement IDisposeable?

  - by Bobby

  What is the best practice for when to implement IDisposeable? Is the best rule of thumb to implement it if you have one managed object in the class, or does it depend if the object was created in the class or just passed in? Should I also do it for classes with no managed objects at all?

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• jquery ui popup a YouTube Video modally

  - by BahaiResearch.com

  Is there a way to use jQueryUI to popup a YouTube video modally? Here's the YouTube code I have: <object width="480" height="385"><param name="movie" value="http://www.youtube.com/v/DIuXtsaUDmM?fs=1&amp;hl=en_US"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/DIuXtsaUDmM?fs=1&amp;hl=en_US" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object>

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• Cannot use ternary operator in LINQ query

  - by Nissan Fan

  I can't figure out why I get a Object reference not set to an instance of an object. error if I use a ternary operator in my LINQ query. var courses = from d in somesource orderby d.SourceName, d.SourceType select new { ID = d.InternalCode, Name = string.Format("{0} - {1}{2}", d.InternalCode, d.SourceName, (d.SourceType.Length > 0 ? ", " + d.SourceType : string.Empty)) }; Any thoughts?

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• Best practice or performance difference between VB.NET ToString() and & concatenation

  - by slolife

  When I am concatenating object values together to form a string in VB.NET, is there a difference in performance or a recommended best practice between using the & concat or the + concat with calls to .ToString() on each object? Example (which is faster or best practice): Dim result1 As String = 10 & "em" Dim result2 As String = 10.ToString() & "em"

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• Are there video tutorials on how to analyze the memory footprint of an iPhone app?

  - by mystify

  Are there good video tuts that show how to use this Object Alloc instrument to figure out if my objects and other stuff get freed from memory? Also, I have a bunch of C code and use Core Audio, so those are not really objects but still heavy in memory. Would like to know more about that Object Alloc instrument.

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• Java Container constraints question

  - by llm

  I am using the following: java.awt.Container.add(Component comp, Object constraints) How do I specificy the constraints object? I need to be able to place a component within the container. Oh and my class extends JInternalFrame if this helps... I need to specify coordinates to place the component within the container

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• How Do I Detect the Adobe Acrobat Version Installed in Firefox via JavaScript

  - by Snocrash

  Title says it all. I know this can be done in IE by creating an ActiveX object, but how do I do it in FF. The navigator.plugins['Adobe Acrobat'] object lets me know if it's installed or not, but it doesn't contain the version number. Any ideas?

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• Error exposing event througt interface

  - by carlos

  I have this interface Interface IProDataSource Delegate Sub DstartingHandler(ByVal sender As Object, ByVal e As EventArgs) Event starting_Sinc As DstartingHandler End Interface Trying to use the intarce like this Public Class DataSource : Implements IProDataSource Public Event starting_Sinc As DstartingHandler Implements IProDataSource.starting_Sinc Public Delegate Sub DstartingHandler(ByVal sender As Object, ByVal e As EventArgs) End Class Gives me the next error Event 'starting_Sinc' cannot implement event 'starting_Sinc' on interface 'IProDataSource' because their delegate types 'DstartingHandler' and 'IProDataSource.DstartingHandler' do not match.

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• programming in lua, objects

  - by anon

  Sample code: function Account:new (o) o = o or {} -- create object if user does not provide one setmetatable(o, self) self.__index = self return o end taken from: http://www.lua.org/pil/16.1.html What is the purpose of the: self.__index = self line? And why is it executed every time an object is created?

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• Does a syntax for this exist? In any language?

  - by Michael

  It seems pretty common to me to have an argument, in a dynamically typed language that is either an Object or a key to lookup that object. For instance when I'm working with a database I might have a method getMyRelatedStuff(person) All I really need to lookup the related stuff is the id of the person so my method could look like this in python: def getMyRelatedStuff(person_or_id): id = person_or_id.id if isinstance(person,User) else person_or_id #do some lookup Or going the other direction: def someFileStuff(file_or_name): file = file_or_name if hasattr(file,'write') else open(file_or_name)

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• Euler rotation of direction vector

  - by Tom Savage

  I have defined an object in 3D space with position, rotation and scale values (all defined as 3D vectors). It also has upwards and forwards direction vectors. When I rotate the object, I need these direction vectors to rotate with it. Assuming my up vector is (0, 1, 0) and my forwards vector is (0, 0, 1) at zero rotation, how might I achieve this?

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• Air/Flex concatenating a variable with a property

  - by Deyon

  I have three text boxes on the stage id=red, blue, green same as the keys in my cars Object/Array public function carsToBox():void { var cars:Object={red:"300zx",blue:"Skyline",green:"Supra"}; for(var tempObj:String in cars) { tempObj.text= cars[tempObj];//this trows errors } } So I'm thinking "tempObj.text" would equal red.text but I can't stick "tempObj" with ".text" is there a way this can be done?

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• Destructors in C++

  - by user265260

  does the Destructor deallocate memory assigned to the object which it belongs to or is it just called so that it can perform some last minute housekeeping before the object os deallocated by the compiler?

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