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• SQL - Add up all row-values of one column in a singletable

  - by ThE_-_BliZZarD

  Hello Everybody, I've got a question regarding a SQL-select-query: The table contains several columns, one of which is an Integer-column called "size" - the task I'm trying to perform is query the table for the sum of all rows (their values), or to be more exact get a artifical column in my ResultSet called "overallSize" which contains the sum of all "size"-values in the table. Preferable it would be possible to use a WHERE-clause to add only certain values ("WHERE bla = 5" or something similar). The DB-engine is HSQLDB (HyperSQL), which is compliant to SQL2008. Thank you in advance :)

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• how to draw directed edges with "IGraphContentProvider"?

  - by syeed

  Hi, I am using ZEST and RCP to build a graph visalization tool. I used "IGraphContentProvider" and the "LabelProvider" for drawing the grpah. My question is: how can I draw a directed edge between two nodes using IGraphContentProvider? Thanks in advance -syeed

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• Explanation of alias attribute in Joomla

  - by Casebash

  What exactly is the alias attribute of menu items used for in Joomla? In particular, are they suitable for uniquely identifying pages? Related questions This is a followup of this question.

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• Generic object comparison diff routine

  - by MicMit

  The question stems from database tables comparison. Let's say we put left row in the instance Left and the right one into instance Right of the same type. And we'got many tables and respective types. How to implement more or less generic routine resulting in a collection of diffs e.g. propertyName , leftValue , rightValue for each such a pair of instances of the same type.

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• unprotected access to member in property get

  - by Lenik

  I have a property public ObservableCollection<string> Name { get { return _nameCache; } } _nameCache is updated by multiple threads in other class methods. The updates are guarded by a lock. The question is: should I use the same lock around my return statement? Will not using a lock lead to a race condition?

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• What problems does Reflection solve?

  - by Praveen

  Hi All, I went through all the posts on Reflection but couldn't find the answer to my question. Can you please tell me what were the problems in programming world before .Net Reflection came and how it solved those problems. Please explain with example.

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• How to prove worst-case number of inversions in a heap is O(nlogn)?

  - by Jacques

  I am busy preparing for exams, just doing some old exam papers. The question below is the only one I can't seem to do (I don't really know where to start). Any help would be appreciated greatly. Use the O(nlogn) comparison sort bound, the theta(n) bound for bottom-up heap construction, and the order complexity if insertion sort to show that the worst-case number of inversions in a heap is O(nlogn).

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• Convert to lowercase in a mod_rewrite rule.

  - by dreeves

  I would like URLs like server.com/foo to be case-insensitive. But server.com/foo actually gets mod_rewrite'd to server.com/somedir/foo (Assume that all the files in "somedir" are lower case.) So the question is, how to accomplish a mod_rewrite like the following: RewriteRule ^([^/]+)/?$ somedir/convert_to_lowercase($1)

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• getting data from xml tags that have : (colon in them)

  - by user3536228

  I am using AIR to build an application that will search and show the thumbnails from deviantART the request URL for getting resuts in form of RSS feed i get the following for simplicity i am showing the only code in which i have my question we can use this for tag trace(myxml.channel.item[0].title); but what to do for tags like media:content trace(myxml.channel.item[0].media:content); but it does not work The colons are confusing me

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• How do you implement the Decorator pattern if you can't inherit from the class you want to decorate?

  - by Lennie

  Hi, This is more a design question... You can't do a decorate design pattern if: 1) The object is marked "sealed" meaning you can't extend from it. 2) or you want to override a method but its not virtual. What can you do then? Taken that you can't change the class source code if you don't have the source code (like a 3rd party library).

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• Can we pass a whole Structure over an URL ?

  - by Somu

  Hi, I am opening a new popup window on click of an URL in my page. My question over here is Can i pass whole structure to the new page ? If thats not possible is there any simple method to do that ?

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• twitter like tweet update notification in asp.net

  - by dianuh

  we are adding new functionality in our application where in there would be some users posting short comments and on the other side there would be some users monitoring the activity or comments posted by the other users within the same application. my question is, what is the best way of implementing the notification of new comment availability(similar to tweet update notification)? FYI the application is on .Net 3.5.

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• Preg_match if a string beginns with "00"{number} or "+"{number}

  - by streetparade

  Hy i have to test if a string begins with 00 or with + Say i have the string 0090 or +41 if the string begins with 0090 return true, elseif string begins with +90 replace the + with 00 else return false The last two digits can be from 0-9 How do i do that in php? I hope i could explain my question clear?

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• please help me to solve problem

  - by davit-datuashvili

  hi everybody fisrt of all this is not homework and now question is like this suppose i have array int a[]=new int[]{0xBCDA,0xABFE,0xBCAD,0xEFCA,0xFFCA} i know that there is always some hexadecimal number which occurs in all number or in this case A is repeat in array everywhere so my aim is print only repeat number and other numbers should be zero so my new array should be like this 0x000A, 0xA000,0x00A0 0x000A,0x000A any idea please help me? p.s please nobody say that this is homework

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• An IE7 toolbar button, with 2 different *.rc files

  - by karikari

  I have a IE 7 button toolbar project on Visual C++. My question is, can my button have 2 *.rc files. Means, by default it will use the 1st *.rc file, and when certain condition achieve inside my *.cpp, the button will be using the 2nd *.rc file. Is this allowed in visual studio or IE7? edit: Both rc files has different information for icon image.

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• How do i pass null into stdin like this perl code?

  - by acidzombie24

  This is my question and apparently this is the answer. I found you can stdout to null by writing NUL in command prompt so i tried writing < NUL at the end of my argument. No luck. How do i pass in null or do something with the IO locks like that perl code does so i can get my ffmpeg script not locking up after 15 or so seconds?

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• Which IDE for Scala 2.8?

  - by Lukasz Lew

  This is the same question for older version, but they say that Eclipse plugin has been improved. But what about others?

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• how do i call another .cs program from a c# console application?

  - by eyaf

  forgive me but i'm just new. so how do i solve the question above? thanks a lot.

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• Looping over all tabs in IE 8

  - by Quandary

  Question: I want to loop over all open tabs in Internet Exporer (for all open IE windows) and save the URL in a text file. How can I do that ? I have windows 7 32 bit and IE 8. Code for Firefox/Google chrome would also be welcome.

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• possible to create custom scrollbar graphics without flash?

  - by Joel

  A friend is wanting me to help her convert her flash based website to html. She has an embedded textbox with a scrollbar that is using a flower instead of a normal scrollbar. Avoiding the obvious question of why a user would want a non-standard element to do this task, is it possible to do this without flash?

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• Rendering UML diagrams from text files

  - by Per Ersson

  Is there any good tool or tool-chain that allows UML images in the .svg format to be created from a textual source file? The reason for this question is that I want to automate the generation of these images to avoid having to manually create and update this set of images.

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• What are the problems that would require creating a new programing language? [closed]

  - by Hari

  This might be a silly question, but still I am going ahead and asking it. Nowadays I see new dynamic languages like Groovy being developed for the JVM, and languages like Ruby gaining prominence. Each of these seems to be solving different shortcomings in the existing languages. Is there any one or set of problems that are not addressed by any of the current languages?

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• How to set editable true for linktype column of gridview & how to set default value for diif types c

  - by Royson

  My gridview has link type column but am unable to edit it. how to edit such type of cell. Few more question i have i want to set checked to true for all rows in checkbox column. Also i want to set default value for combo box column Thanks

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• Haskell: list of elements with class restriction

  - by user1760586

  here's my question: this works perfectly: type Asdf = [Integer] type ListOfAsdf = [Asdf] Now I want to do the same but with the Integral class restriction: type Asdf2 a = (Integral a) => [a] type ListOfAsdf2 = (Integral a) => [Asdf2 a] I got this error: Illegal polymorphic or qualified type: Asdf2 a Perhaps you intended to use -XImpredicativeTypes In the type synonym declaration for `ListOfAsdf2' I have tried a lot of things but I am still not able to create a type with a class restriction as described above. Thanks in advance!!! =) Dak

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• I'm still learning OOP. Any tips on staying unbiased and pragmatic?

  - by marcdev

  I keep reading about defficiencies and issues with languages. Specifically, I'm learning PHP and Javascript, but I see it everywhere. This question arose while reading Javascript: The Good Parts and PHP Objects, Patterns and Practice. While understanding and avoiding easy pitfalls, is there a way I can learn the fundamentals of OOP and discover solid programming practices without overlooking important areas (or simply becoming jaded)? I'm sure I'll have plenty of opportunity to learn from mistakes!

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