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  • Send and receive data trough the power network

    - by luvieere
    I'm not interested in a hardware solution, I want to know about software that may "read" modulated signal received trough the power supply - some sort of a low-level driver that would access the power signal in a convenient place and demodulate it. Is there a way to receive signal from the computer's power supply? I'm interested in an API or library that would allow the computer to be seen as a node in a Power Line Communication network and receive data directly through the power cable, without the need for a converter. Is there any active research in this field? Edit: There is software that reads monitors and displays internal component voltages - DC voltage after being converted and filtered by the power supply - now I need is a method of data encoding that would be invariant to conversion and filtering, the original signal embedded in AC being present in some form within the converted DC signal.

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  • import data from another table with same id

    - by Luca Romagnoli
    Hi, i have 2 table User (id, name, surname,cod) UserNew (uid, uname, usurname, ucod) The first table has data the second no. I have to copy the data of the User table in the UserNew table. I've tried with a insert query but uid (primary key) value changes. How can i do to mantaince the same values? thanks

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  • What Software Engineering Areas should be stressed upon while Interviewing Candidate for Fulltime So

    - by Rachel
    Hi, This question is somewhat related to other posts which I found on Stackoverflow but not exactly and so am prompted to ask about it. I know we must ask for Data-Structures and Algorithms but what specific data-structures or Algorithms or other CS Concepts should be asked while interviewing Sr. Software Engineering Fulltime Position as compared with Software Engineering Position. Thanks.

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  • Generate data for an application

    - by Duncan Benoit
    Hi there If your planing to build an application but you don't have enough data to fill a database, how you will generate some ? Do you know any application which can generate data based on some criterias and export it later in MySQL database? Thanks :)

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  • how to send data to server with the same TCP connection using ajax or JS trick

    - by zack
    Hi, I know how to keep a connection indifinetely open server side to stream continuously data to javascript. BUT I do not know how to send data reusing the same TCP from browser to server. so there is not the 3 way handshake and only 2 tcp packets. I know it is possible but I do not how to do it : use xmlhttprequest? or script tag ajax ? can you tell me how to do it. thank you very much

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  • Saving multiple select form data in db

    - by fl00r
    Hi. I've got form for some model A, which has got few fields: tile description ... colors colors are selected from multiple select and options are ['red', 'green', 'blue', 'yellow']. User can choose colors as many as he wants. I don't think that making Color model and has_many relationship is good solution here to store colors data in model A. So question is: How to store multiple data in db for such multiple select forms?

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  • Does Boost work with IntervalZero RTX 2009?

    - by cs-79
    Hi all Rtx experts, Have anyone implemented hard real-time app on IntervalZero Rtx environment using Boost libraries? I wish to use the Boost `unordered` data structures instead of solely relying on STL::Vector. Or Array/Vector is the only data structure supported by Rtx? * Off topic question: Can we use STL::String instead of char pointer for string in Rtx? Thanks.

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  • Where does Drupal store NODE data?

    - by RD
    This is a follow up to my previous question: http://stackoverflow.com/questions/1284476/where-does-drupal-store-node-body-content Now, I tried adding values into node and node-revision, but still the node data is not showing. So, obviously more data is stored somewhere else. So basically, I want to know, which tables are affected when you create a new node?

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  • Sencha 2 -need help for cf json data (for eg:CFJSONReader )

    - by usershaf
    I am new to sencha , and using sencha 2 mvc. I have a cfc returned json data, which I want to use in my list views. I have read about CFJsonReader and CFQueryReader, but both have been scripted for EXt Js 3 x. I cant see an mvc proper code for sencha 2 anywhere else.I tried many times and all in vein.Please some help suggest me/help me to solve my problem ...My outpur is like : {"QUERY":{"COLUMNS":["CLIENTID"],"DATA":[[1013],[1010],[1016],[1017],[1013]]},"TOTALROWCOUNT":5} Please pls help me...

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  • iPhone Coredata saving error

    - by satyam
    I'm trying to create core data application. Some times when trying to save data, i'm seeing following error: Error: NSInvalidArgumentException, Reason: * -_referenceData64 only defined for abstract class. Define -[NSTemporaryObjectID_default _referenceData64]!, Description: * -_referenceData64 only defined for abstract class. Define -[NSTemporaryObjectID_default _referenceData64]! I didn't understand why this error is coming and how to avoid it. Can some one help me please.

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  • C++ stl collections or linked lists

    - by Lucas
    I'm developing a OpenGL based simulation in C++. I'm optmizing my code now and i see throughout the code the frequently use of std:list and std:vector. What is the more performatic: to continue using C++ stl data structs or a pointer based linked list? The main operation that involve std::list and std::vector is open a iterator and loop through all items in the data structs and apply some processing

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  • Fill a array with List data

    - by marionmaiden
    How can I fill a array with the data provided by one List? For example, I have a List with Strings: List l = new ArrayList<String>(); l.add("a"); l.add("b"); l.add("c"); then I want to copy this data into a String array: String[] array = ?

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  • possibility to do type/data conversion of data returned by ria services?

    - by reinier
    My service returns an byte array, which I have to convert to an 'animated gif' (using imagetools since silverlight doesn't support it yet) I was wondering, is it possible to insert some code at the client, where I can do the conversion before the actual object is returned to whatever it is binded against? On the server side, the queries can be customized before it is sent over the wire. I'm asking for the exact opposite, can I do some on the fly conversions the moment they get of the wire and before they are returned to the controls. If I'm overthinking this and there is a smarter/better/easier way to do it, I'm all for such an answer as well

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  • WP7 Return the last 7 days of data from an xml web service

    - by cvandal
    Hello, I'm trying to return the last 7 days of data from an xml web service but with no luck. Could someone please explain me to how I would accomplish this? The XML is as follows: <node> <api> <usagelist> <usage day="2011-01-01"> <traffic name="total" unit="bytes">23579797</traffic> </usage> <usage day="2011-01-02"> <traffic name="total" unit="bytes">23579797</traffic> </usage> <usage day="2011-01-03"> <traffic name="total" unit="bytes">23579797</traffic> </usage> <usage day="2011-01-04"> <traffic name="total" unit="bytes">23579797</traffic> </usage> </usagelist> </api> </node> EDIT The data I want to retrieve will be used to populate a line graph. Specificly I require the day attribute value and the traffic element value for the past 7 days. At the moment, I have the code below in place, howevewr it's only showing the first day 7 times and traffic for the first day 7 times. XDocument xDocument = XDocument.Parse(e.Result); var values = from query in xDocument.Descendants("usagelist") select new History { day = query.Element("usage").Attribute("day").Value, traffic = query.Element("usage").Element("traffic").Value }; foreach (History history in values) { ObservableCollection<LineGraphItem> Data = new ObservableCollection<LineGraphItem>() { new LineGraphItem() { yyyymmdd = history.day, value = double.Parse(history.traffic) }, new LineGraphItem() { yyyymmdd = history.day, value = double.Parse(history.traffic) }, new LineGraphItem() { yyyymmdd = history.day, value = double.Parse(history.traffic) }, new LineGraphItem() { yyyymmdd = history.day, value = double.Parse(history.traffic) }, new LineGraphItem() { yyyymmdd = history.day, value = double.Parse(history.traffic) }, new LineGraphItem() { yyyymmdd = history.day, value = double.Parse(history.traffic) }, new LineGraphItem() { yyyymmdd = history.day, value = double.Parse(history.traffic) }, }; lineGraph1.DataSource = Data; }

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  • To get data from table in script from sql server 2005

    - by Zerotoinfinite
    Hi Experts, I am using sql server 2005 I have a table [say tblHistory] and this table contains 100 rows. I have created the same table at the server, but the table doesn't have the data, I want data from tblHistory to convert into INSERT INTO tblHistory ------ so that I could run the script on the server to fill the database. Please help, it's urgent

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  • udp server unable to transmit data

    - by mawia
    Hi! all, I have written a simple udp server which has to transmit certain data to few of it's clients. but though server is successfully executing send,but unable to transmit even a single byte.The return value of send is 0 although I have enough data to be transmitted.you can see the code for the said server here: http://pastebin.com/zeMcwd6X Can you people help in finding the possible culprit for the same.Any reply in this regard will be appreciated. Lot of Thanks in advance! Mawia

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  • How to send data from site to browser?

    - by SaltLake
    I'd like to send data to browser from server (website). For example on SO you receive notifications about new answers when answering a question. Should I every n seconds send ajax queries to server, or there are better ways of doing this? Is it possible to push data from server to browser?

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  • ASP.NET MVC - Appending data onto a file download

    - by aschepis
    what is the best way to append data onto a file download? I figure that i can make my own class that implements InputStream and just consolidates two input streams (the file first, my additional data to append second.) but is there an existing view class that i can use to just return an InputStream or will i have to roll my own view class as well?

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  • C# Retrieve Canon Specific EXIF Data

    - by dkpatt
    I have wrote an app that reads the basic EXIF data from an image via the PropertyItems exposed in .Net's System.Drawing.Image class. However, I cannot retrieve Canon specific EXIF data via these properties. How does one read this information? I know it exist in the file as Photoshop reads it.

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  • Taking backup of data in a table.

    - by Rishabh Ohri
    Hi All, Is there some way to backup the data in a table in sql server by using sql scripts. Note: I dont want to take the backup of the whole database. And later on restore the same data back in case of any failure. Please suggest some solution.

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  • How would you measure conversion for an iPhone App Download?

    - by Eran Kampf
    I want to test how users convert from my web page to downloading my iPhone app. Right now the best funnel I figured out was to go through a page that pings Google Analytics and then redirects to an iTunes link. But this funnel only measures conversion for users who got redirected to iTunes and not if they actually downloaded the app once they saw it in iTunes. Anyone knows of a way to measure conversion to the actual download? (I know this is not a coding question but still a problem a app developers would encounter trying to market their app)

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