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  • linq get sum of two columns in one query

    - by Axarydax
    Hi, let's say that I have a table called Items (ID int, Done int, Total int) I can do it by two queries: int total = m.Items.Sum(p=>p.Total) int done = m.Items.Sum(p=>p.Done) But I'd like to do it in one query, something like this: var x = from p in m.Items select new { Sum(p.Total), Sum(p.Done)}; Surely there is a way to call aggregate functions from LINQ syntax...?

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  • Can one Python project use both 2.x and 3.x code?

    - by Begbie00
    Hi all - I'm going to start on a long (~1-year) programming project in Python. I want to use wxPython for my GUI (supports 2.6), but I also want to use 3.1 for the rest of the project (to start using the 3.x syntax). Is there any way for me to design a project that mixes 2.x and 3.x modules? Or should I just bite the bullet and use either 2.x (preferred, since I really want to learn wxPython) or 3.x throughout? Thanks, Mike

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  • What is your experience with Nitrogen on Erlang?

    - by Yuval A
    I've been checking out the Nitrogen Project which is supposed to be the most mature web development framework for Erlang. Erlang, as a language, is extremely impressive. However, with regards to Nitrogen, what I am not too keen about is using Erlang's rather uncommon syntax (unless you're native in PROLOG) to build UIs. What is your experience with it as opposed to other mainstream web frameworks such as Django or Rails?

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  • Running DOS command through C# just opens blank cmd window

    - by Mohit Deshpande
    I was trying to execute a command through C#, but when I run the following code, a blank cmd window just opens up. The code: string command = string.Format(@"adb install C:\Users\Mohit\Programming\Android_Workspace\{0}\bin\{0}.apk", appName); ProcessStartInfo cmdsi = new ProcessStartInfo("cmd.exe"); cmdsi.Arguments = command; Process cmd = Process.Start(cmdsi); What could be wrong? I am sure the syntax is right.

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  • Flex - Disabling the transparent background overlay on a popup

    - by pfunc
    I have a button in my flex app that creates a popup overtop of everything. However, it seems like flex automatically puts this transparent overlay overtop of the stage when this happens. How do I disable this? I have tried contentBackgroundAlpha="0" and backgroundAlpha="0" with no luck. anyone know what the proper syntax is for disabling this transparency? I have been searching through the docs for a 30 minutes now looking for it.

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  • Is this a situation where Qt Model/View architecture is not useful?

    - by csmithmaui
    Hi, I am writing a GUI based application where I read a string of values from serial port every few seconds and I need to display most of the values in some type graphical indicator(I was thinking of QprogressBar maybe) that displays the range and the value. Some of the other data that I am parsing from the string are the date and fault codes. Also, the data is hierarchical. I wanted to use the model/view architecture of Qt because I have been interested in MVC stuff for a while but have never quite wrapped my brain around how to implement it very well. As of now, I have subclassed QAbstractItemModel and in the model I read the serial port and wrap the items parsed from the string in a Tree data structure. I can view all of the data in a QtreeView with no issues. I have also began to subclass QAbstractItemView to build my custom view with all of the Graphical Indicators and such. This is where I am getting stuck. It seems to me that in order for me to design a view that knows how to display my custom model the view needs to know exactly how all of the data in the model is organized. Doesn't that defeat the purpose of Model/View? The QTreeView I tested the model with is basically just displaying the model as it is setup in the Tree structure but I don't want to do that because the data is not all of the same type. Is the type of data or the way you would like to present it to the user a determining factor in whether or not you should use this architecture? I always assumed it was just always better to design in an MVC style. It seems to me like it might have been better to just subclass QWidget and then read in from the serial port and update all of subwidgets(graphical indicators, labels, etc...) from the subclass. Essentially, do everything in one class. Does anybody understand this issue that can explain to me either what I am missing or why I shouldn't be doing it this way. As of now I am a little confused. Thanks so much for any help!

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  • What does this javascript do?

    - by Rakesh Juyal
    I was adding recent videos gadget on my blog. In that widget i was supposed to add this line <script src="/feeds/posts/default?orderby=published&alt=json-in-script&callback=showrecentpostswiththumbs"> also, i added another script which was having the method showrecentpostswiththumbs [ used in callback ]. Please let me know what does above syntax do?

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  • Berkeley DB java edition, any LGPL or BSD alternatives in Java?

    - by Ali
    Hi All, I am dealing with a huge dataset consisting of key-value pairs. The queries are always in the form of range queries on the key space (keys are numbers) hence any persistent B-Tree like structure will handle the situation. I would like to use BDB-Java Edition but the product is closed source and my company doesn't want to buy BDB-JE License. I am wondering, would you please share your experience with any non-GPL java based key-value storage system. Thanks, -A

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  • generating program structur (nodes) using bison and flex

    - by gruszczy
    I would like to write myself a pretty printer for java using bison and flex. I have written a pretty printer for a script language, but I was only writing visitors, which made the printing. How can I turn a program using my formal grammar into a tree of nodes (made using C++ classes), that afterwards I could visit using my visitor? Maybe you could give me some link with an example of this? What i need to put into flex/bison files?

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  • Good Java graph algorithm library?

    - by Nick Fortescue
    Has anyone had good experiences with any Java libraries for Graph algorithms. I've tried JGraph and found it ok, and there are a lot of different ones in google. Are there any that people are actually using successfully in production code or would recommend? To clarify, I'm not looking for a library that produces graphs/charts, I'm looking for one that helps with Graph algorithms, eg minimum spanning tree, Kruskal's algorithm Nodes, Edges, etc. Ideally one with some good algorithms/data structures in a nice Java OO API.

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  • How do you use "not" in xpath

    - by Guy
    I want to write something of the sort: //a[not contains(@id, 'xx')] (meaning all the links that there 'id' attribute doesn't contain the string 'xx') I can't find the right syntax. Thanks

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  • github like workflow on private server over ssh

    - by Jesse
    I have an server (available via ssh) on the internet that my friend and I use for working on projects together. We have started using git for source control. Our setup currently is as follows: Friend created repository on server with git init named project.friend.git I cloned project.friend.git on server to project.jesse.git I then cloned project.jesse.git on server to my local machine using git clone jesse@server:/git_repos/project.jesse.git I work on my local machine and commit to the local machine. When I want to push my changes to the project.jesse.git on server I use git push origin master. My friend is working on project.friend.git. When I want to get his changes I do pull jesse@server:/git_repos/project.friend.git. Everything seems to be working fine, however, I am now getting the following error when I do git push origin master: localpc:project.jesse jesse$ git push origin master Counting objects: 100, done. Delta compression using up to 2 threads. Compressing objects: 100% (76/76), done. Writing objects: 100% (76/76), 15.98 KiB, done. Total 76 (delta 50), reused 0 (delta 0) warning: updating the current branch warning: Updating the currently checked out branch may cause confusion, warning: as the index and work tree do not reflect changes that are in HEAD. warning: As a result, you may see the changes you just pushed into it warning: reverted when you run 'git diff' over there, and you may want warning: to run 'git reset --hard' before starting to work to recover. warning: warning: You can set 'receive.denyCurrentBranch' configuration variable to warning: 'refuse' in the remote repository to forbid pushing into its warning: current branch. warning: To allow pushing into the current branch, you can set it to 'ignore'; warning: but this is not recommended unless you arranged to update its work warning: tree to match what you pushed in some other way. warning: warning: To squelch this message, you can set it to 'warn'. warning: warning: Note that the default will change in a future version of git warning: to refuse updating the current branch unless you have the warning: configuration variable set to either 'ignore' or 'warn'. To jesse@server:/git_repos/project.jesse.git c455cb7..e9ec677 master -> master Is this warning anything I need to be worried about? Like I said, everything seems to be working. My friend is able to pull my changes in from my branch. I have the clone on the server so he can access it since he does not have access to my local machine. Is there something that could be done better? Thanks!

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  • define integer array fortran

    - by Praveen
    Hello friends, I am a newbie in Fortran. Can any1 tell me how to define an integer array in prior. E.g. I want to define an array with no.of days in 12 months. like... integer,allocatable(12,1) :: days days=[31,28,31,30,31,30,31,31,30,31,30,31] Is this syntax correct? If not, please let me know the correct one. Thanks Praveen

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  • Adding Blogengine.net Javascript file references

    - by Ryan
    I have a new blogengine site up and want to set up syntax highlighting. The problem is that I have a few files (javascript and css) that I need to add the the head of the page, but there is no one page or masterpage. Does anyone one know where to write out these references so they will show up on all pages? Thanks Ryan

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  • WPF Writing custom Control

    - by Petoj
    I wanted to write a Custom Control that would show a family tree... so i looked on FamilyShow.... So their control inherits FrameworkElement but then every thing gets super complex... are there any easy tutorials out there that show how to implement a custom FrameworkElement with children and so on? Basically what i fail to do is this, Add child controls and show them, and when drawing getting the coordinates of the child controls...

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  • Efficient code to avoid circular references in c# object model

    - by Kumar
    I have an excel like grid where values can be typed referencing other rows To check for circular references when a new value is entered, i traverse the tree and create a list of values referenced thus far, if the current value is found in this list, i return an error thus avoiding a circular reference. This is infrequent enough where extreme performance is not an issue but... Question - is there a better way ? I'm told it's not the most optimal but no answer was provided so on to the experts @ SO :)

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  • MIPS Assembler Instruction parameters

    - by Martin K.
    Hi, why does such a instruction as mul $t1, $v0 , 4 evaluates as expected. But mul $t1, 4 , $v0 results in a syntax error! I wonder why the first one works, because mul only works with registers per default, so I expect that only a solution like this will be workin li $t1, 4 # set $t1 = 4 mul $t1, $v0 , $t1 # set $t1 = 4 * n I'm using the SPIM simulator.

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  • Loop through SimpleXml object in php

    - by chirs
    I have a simpleXml object and want to read the data from the object.I am new to php.The object details are as follows.I want to read name like general and name which is inside company array i.e Korey Kay & Partners.What is the syntax for it? SimpleXMLElement Object ( [@attributes] = Array ( [type] = array ) [project] = Array ( [0] = SimpleXMLElement Object ( [created-on] = 2008-07-18 [id] = 2257372 [last-changed-on] = 2010-05-27T22:28:29Z [name] = *GENERAL [status] = active [company] = SimpleXMLElement Object ( [id] = 406952 [name] = Korey Kay & Partners ) )

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