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  • What is MVC and what are the advantages of it?

    - by Teifion
    I found What are mvp and mvc and what is the difference but it didn't really answer this question. I've recently started using MVC because it's part of the framework that myself and my work-partner are going to use. We chose it because it looked easy and separated process from display, are there advantages besides this that we don't know about and could be missing out on? Pros Display and Processing are seperated Cons None so far

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  • C: performance of assignments, binary operations, et cetera...

    - by Shinka
    I've heard many things about performance in C; casting is slow compared to normal assignments, functional call is slow, binary operation are much faster than normal operations, et cetera... I'm sure some of those things are specific to the architecture, and compiler optimization might make a huge difference, but I would like to see a chart to get a general idea what I should do and what I should avoid to write high-performance programs. Is there such a chart (or a website, a book, anything) ?

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  • Authenticate User manually

    - by Sergey
    I am trying to authenticate the user after I got credentials using oAuth (with Twitter if that makes a difference). As far as I could understand it, I can directly put the Authentication object into SecurityContextHolder. Here is how I do it: Authentication auth = new TwitterOAuthAuthentication(member, userDetailsService.loadUserByUsername(member.getUsername()).getAuthorities()); SecurityContextHolder.getContext().setAuthentication(auth); This for some reason does absolutely nothing. What am I missing and what should I do to accomplish what need?

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  • how do i Raw url ENCODING/ DECODING in javascript and ruby to get the same answers in both?

    - by Mo
    Hi i am working on a web application where i have to encode and decode a string at the JavaScript side and ruby backend of the code. the only problem is that the escape methods for JavaScript and ruby have a small difference. in java script the " " is treated as "%20" but in ruby the " "(space) is encoded to "+". any way to work around this? another ruby method to encode a string in RAW url encode? thank you

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  • Behavior of virtual function in C++

    - by Summer_More_More_Tea
    Hi everyone: I have a question, here are two class below: class Base{ public: virtual void toString(); // generic implementation } class Derive : public Base{ public: ( virtual ) void toString(); // specific implementation } The question is: If I wanna subclass of class Derive perform polymophism using a pointer of type Base, is keyword virtual in the bracket necessary? If the answer is no, what's the difference between member function toString of class Derive with and without virtual?

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  • Sesion timout vs Form Authentication timeout

    - by Costa
    Hi What is the difference between a abandon Session and a cookie timeout, what if the session is abandon and the cookie is still alive, is that can lead to a problem? <sessionState timeout="1" /> <authentication mode="Forms"> <forms loginUrl="login.aspx" timeout="1" /> </authentication> Thanks

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  • Two method for linking a object using GCC ?

    - by bluewater
    I've known that I should use -l option for liking objects using GCC. that is gcc -o test test.c -L./ -lmy But I found that "gcc -o test2 test.c libmy.so" is working, too. When I use readelf for those two executable I can't find any difference. Then why people use -l option for linking objects? Does it have any advantage?

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  • How important is it to unset variables in PHP?

    - by dd0x
    I am somewhat new to PHP and I am wondering: How important is it to unset variables in PHP? I know in languages like C we free the allocated memory to prevent leaks, etc. By using unset on variables when I am done with them, will this significantly increase performance of my applications? Also is there a benchmark anywhere that compares difference between using unset and not using unset?

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  • Assembly Versioning in .NET

    - by pm_2
    In the Visual Studio 2008 IDE, the properties page allows you to access the version. However, for executables, there appears to be two versions: Under the Publish tab, there is a publish version with a flag to auto increment. Under the Applications Tab (Assembly Info...) there is an assembly and file version - this appears to change the AssemblyInfo.cs file. My question is, what is the difference between the two versions and what are the implications of setting each?

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  • rvalues and temporary objects in the FCD

    - by FredOverflow
    It took me quite some time to understand the difference between an rvalue and a temporary object. But now the final committee draft states on page 75: An rvalue [...] is an xvalue, a temporary object or subobject thereof, or a value that is not associated with an object. I can't believe my eyes. This must be an error, right?

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  • How to implement pure virtual function in C++

    - by skydoor
    Hi, I think the implementation of virtual function is talked about a lot. My question is what about pure virtual function? However it is implemented? In virtual table, how to tell it is a pure or non-pure? What the difference between pure virtual function and virtual function with implementation?

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  • x=["key" => "value"]. How does it work in Ruby?

    - by Earlz
    Ok, so I was comparing some stuff in my own DSL to Ruby. One construct they both support is this x=["key" => "value"] Knowing the difference between arrays and hashes, I would think this to be illegal, but the result in Ruby is [{"key" => "value"}] Why is this? And with this kinda syntax why can't you do x=("key" => "value") Why is an array a special case for implicitly created hashes?

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  • Why can one null return be tested but another throws an exception?

    - by mickey
    I want to test if an xml attribute is present. Given this: XmlAttributeCollection PG_attrColl = SomeNodeorAnother.Attributes; This first test works: if (null != PG_attrColl["SomeAttribute"]) "GetNamedItem" is supposed to return null, but the following test throws an exception complaining about the null it returns. if (null != PG_attrColl.GetNamedItem("SomeAttribute").Value;) Why the difference? Just curious.

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  • lisp, differences in assignment functions

    - by johnc
    I'm pretty new to lisp, so apologies for what may be a simple question, Whilst I understand the difference between DEFVAR and DEFPARAMETER (defvar only sets undefined variables), and the LET is for local scope only, what is the is the use of SETF as opposed to the other, previously mentioned assignment functions?

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