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  • Tuples vs. Anonymous Types vs. Expando object. (in regards to LINQ queries)

    - by punkouter
    I am a beginner who finally started understanding anonymous types. (see old post http://stackoverflow.com/questions/3010147/what-is-the-return-type-for-a-anonymous-linq-query-select-what-is-the-best-way-t) So in LINQ queries you form the type of return value you want within the linq query right? It seems the way to do this is anonymous type right? Can someone explain to me if and when I could use a Tuple/Expando object instead? They all seem very simliar?

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  • How can i resolve the N+1 Selects problem ?

    - by Maxime ARNSTAMM
    Hello everyone, I have trouble understanding how to avoid the n+1 select in jpa or hibernate. From what i read, there's the 'left join fetch', but i'm not sure if it still works with more than one list (oneToMany).. Could someone explain it to me, or give me a link with a clear complete explanation please ? I'm sorry if this is a noob question, but i can't find a real clear article or doc on this issue. Thanks

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  • Why should I be using testing frameworks in PHP?

    - by Industrial
    Hi everyone, I have recently heard a lot of people argue about using PHP testing features like PHPunit and SimpleTest together with their IDE of choice (Eclipse for me). After googling the subject, I have still a hard time understanding the pros and cons of using these testing frameworks to speed up development. If anyone could explain this for me in a more basic level, I would really appreciate it. I am using PHP5 for the notice. Thanks a lot!

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  • What is the purpose of Finalization in java?

    - by Karthik
    Different websites are giving different opinions. My understanding is this: To clean up or reclaim the memory that an object occupies, the Garbage collector comes into action. (automatically is invoked???) The garbage collector then dereferences the object. Sometimes, there is no way for the garbage collector to access the object. Then finalize is invoked to do a final clean up processing after which the garbage collector can be invoked. is this right?

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  • iPhone app sales report help...

    - by Moshe
    I am having trouble understanding my iPhone app sales report. Which column says how many downloads I have? Which report should I use? I am asking here because only developers would understand what I am talking about. Nobody else sees these reports.

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  • PHP: How to get creation date from uploaded file?

    - by Haemp
    Problem: I want to determine the original file creation time from a file uploaded to my server via PHP. My understanding is that the file is copied from the client to a temporary file on my server, which then is referenced in the $_FILES var. The temporary file is of course of no use because it was just created. Is there any way I could get the creation date from the clients original file? Thanks

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  • Simple wave generator with SDL in c++

    - by Vlad Popescu
    i am having problems understanding how the audio part of the sdl library works now, i know that when you initialize it, you have to specify the frequency and a callback<< function, which i think is then called automatically at the given frequency. can anyone who worked with the sdl library write a simple example that would use sdl_audio to generate a 440 hz square wave (since it is the simplest waveform) at a sampling frequency of 44000 hz? thanks in advance

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  • Call RecognizerIntent from service

    - by Tobia Loschiavo
    Hi, I am working on an Android service. I need to call RecognizerIntent from a service in order to use in the service the recognized text. I have no startActivityForResult() method in Service class so I have problem understanding how to achieve this task. Is it possible? Many thanks

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  • Slick: why would I save "Unit" to my database?

    - by alapeno
    I'm new to Scala and Slick and was surprised by something in the Slick documentation: The following primitive types are supported out of the box for JDBC-based databases in JdbcProfile ... Unit ... I don't get why this list contains Unit. From my understanding, Unit is similar to Java's void, something I neither can save to nor receive from my database. What is the intention behind it? edit: you can find it here.

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  • jQuery NewBie Questions: What's the deal with $(document).(ready) ?

    - by Rachel
    Hello, I am newbie to jQuery, just trying to learn it since last couple of days. In my office, there are few experience JavaScript Developer and they work mainly with jQuery for all their needs and whenever I got and talk to them to get some better understanding of how jQuery works and first they say is that on $(document).(ready) you do this and on $(document).(ready) you do that. So my main question is What is the $(document).(ready) and how does it really works ? Any inputs would be highly appreciated.

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  • Whats does these signs mean in vim?

    - by johnas
    I've a hard time understanding signs I see in my text editor vim. I see signs like ^@ and ^A and ^M and ^F. What does this mean? Is there any structured list of these signs and their meaning? Trying to Google it is a dead end since Google will not search for "^@".

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  • I know I can't say myView.frame.origin.x = val - But why ?

    - by Allisone
    I know that I can't use that myView.frame.origin.x = 25.0; that I have to use instead CGRect myFrame = myView.frame; myFrame.origin.x = 25.0; myView.frame = myFrame; And I'm doing it all the time (f.e. in animations), but I don't know why I must do it that way. I would like to fill that gap in my understanding. Can someone explain ?

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  • Should I consider memmove() O(n) or O(1) ?

    - by Andrei Ciobanu
    Hello, this may be a silly question, but I want to calculate the complexity of one of my algorithms, and I am not sure what complexity to consider for the memmove() function. Can you please help / explain ? void * memmove ( void * destination, const void * source, size_t num ); So is the complexity O(num) or O(1). I suppose it's O(num), but I am not sure as I lack for now the understanding of what's going on under the hood.

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  • Visual Studio support for coding in CIL/IL/MSIL?

    - by jdk
    For the longest time I've been curious to code in Intermediate Language just as an academic endeavour and to gain a better understanding of what's "happening under the hood". Is there any sort of Visual Studio support for this in the form of: project templates, IntelliSense integration, and those kind of RAD features?

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  • Why is Serializable Attribute required for an object to be serialized

    - by Keivan
    Based on my understanding SerializableAttribute provides no compile time checks, as its all done at runtime, then why is it required for classes to be marked as serializable? Couldn't sterilizer just try to serialize an object and just fail? isn't it what it does right-now when something is marked, it tries and fails. wouldn't it be better if you had to mark things as unserializable rather than serializable? that way you wouldn't have the problem of libraries not marking things as serializable?

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  • What does the following SPF record allow?

    - by Pasta
    v=spf1 ip4:211.121.22.56 a mx a:server.hostname.com ~all My understanding is it allows the following to send out emails: ip4: 211.121.22.56 a: A record (where website is hosted) mx: whatever the MX record says a: this server name And nothing other than the above 4 places Am I correct?

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  • What is the best script language for n/w programming + web development

    - by Mohanavel
    Hi, I'm interested in developing web application and networking application. For that what is the best script language to learn. Which one is effective for this two. So for, i don't know even a single syntax of any scripting language. Which is the best script for understanding, maintainable, effective and simple (may not). Please don't say what are all you know. Please tell me the best

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  • Not very objective - please help

    - by chainwork
    I am having trouble understanding the meaning and more importantly the concept of an object as it relates to jQuery. I understand the basics that its a collection of data that comes in two forms, properties and methods but I kind of get lost on how it works beyond that. Can anyone point me to some good tutorials that maybe helped you understand? I'm hoping to "Get it" once and for all. Many many thanks for your help! =]

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