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  • carry flag and subtraction issue!

    - by Zia ur Rahman
    If a large number is subtracted from a smaller number then borrow is needed. The carry flag plays the role of borrow during the subtraction operation. Now suppose we want to subtract 56 from 66, obviously the borrow is needed and carry flag will be set. Now how this subtraction is performed to get the result -10, how computer will distinguish that the result is going to be a negative number. Please explain the process.

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  • Target Framework Mismatch

    - by Si Keep
    When adding a reference to a project I sometimes see the message... "The Target Framework version for the project is higher than the current project Target Framework version. Would you like to add this reference to your project anyway?" I understand what the message is indicating but can anyone explain what issues might arise from saying 'Yes'?

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  • is it possible in javascript to create shortcuts with sequence like 123,345 instead of combo?

    - by frankB
    I already used some script to implement the shortcuts in my web page but i was wondering if could be possible to associate some combination not syncronic like Ctrl+X but more like a sequence typing 1..2..3 or any other combination to execute a script... lets assume this example: you have a long list with numbers: you could type 3..5...6, so you can go to the item 356 passing trough the item 3 then 35 then 356 more or less like when you type while selecting a select box i hope it was clear, id not easy to explain...

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  • Python new-style classes and __subclasses__ function

    - by Fraser Graham
    Can somebody explain to me why this works (in Python 2.5) : class Foo(object): pass class Bar(Foo): pass print(Foo.__subclasses__()) but this doesn't : class Foo(): pass class Bar(Foo): pass print(Foo.__subclasses__()) The latter returns "AttributeError: class Foo has no attribute '__subclasses__'" but i'm not sure why. I know this is related to old-style vs. new-style classes but i'm not clear on why that would make this functionality unavailable.

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  • Will this only allow certain extensions?

    - by Dr Hydralisk
    I found this snippet that says will only allow certain file types. Will it work and could someone bypass it to upload what ever file type they want? And could someone explain the substr part, i don't get how it works.. <?php function CheckExt($filename, $ext) { $name = strtolower($filename); if(substr($name, strlen($name) -3, 3) == $ext) return true; else return false; } ?>

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  • Python references

    - by hekevintran
    Can someone explain why the example with integers results in different values for x and y and the example with the list results in x and y being the same object? x = 42 y = x x = x + 1 print x # 43 print y # 42 x = [ 1, 2, 3 ] y = x x[0] = 4 print x # [4, 2, 3] print y # [4, 2, 3] x is y # True

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  • database assignment

    - by eric
    Hi, Given the following table: CREATE TABLE T1 (A INTEGER NOT NULL); CREATE TABLE T3 (A SMALLINT NOT NULL); INSERT T1 VALUES (32768.5); SELECT * FROM T1; INSERT T3 SELECT * FROM T1; SELECT * FROM T3; What is the output of above query? If any error occured please declare the line of it?Explain your answer!

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  • How to balance load in a Apache + Mongrel application

    - by Will
    I was wondering if someone can explain how can a rails application be balanced. Two questions: Does it even help having separate rails applications reading from the same database in the same dedicated server? I understand Apache can balance load installing some extra modules? am i right? how can we accomplish this? (please provide explanation for dummies)

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  • GCC compile time division error

    - by kartikmohta
    Can someone explain this behaviour? test.c: #include <stdio.h> int main(void) { printf("%d, %d\n", (int) (300.6000/0.05000), (int) (300.65000/0.05000)); printf("%f, %f\n", (300.6000/0.05000), (300.65000/0.05000)); return 0; } $ gcc test.c $ ./a.out 6012, 6012 6012.000000, 6013.000000 I checked the assembly code and it puts both the arguments of the first printf as 6012, so it seems to be a compile time bug.

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  • Why 10675199.02:48:05.4775807 TimeSpan Maximum for CompilationSection?

    - by Alex
    I was looking at the metadata for System.Web.Configuration.CompilationSection, and noticed the following attribute on the TimeSpan BatchTimeout property: [TimeSpanValidator(MinValueString = "00:00:00", MaxValueString = "10675199.02:48:05.4775807")] Could someone explain why this is the allowed max value? TimeSpan itself has an upper limit, so why would there be another value validation, and why this number?

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  • What is a good metaphor for c memory management?

    - by fsmc
    I'm trying to find a good metaphor to explain memory allocation, initialization and freeing in c to a non technical audience. I've heard pass-by-reference/value talked about quite well with postal service usage, but not so much for allocation/deallocation. So for I've thought about using the idea of renting a space might work, but I wonder if the SO crew can provide something better.

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  • android bluetooth

    - by yoavstr
    can someone explain to me the concept behind using bluetooth my project in my studies is to make an android app using bluetooth, SQLLIGHT and google app the app itself is a very easy one but i just dont get the tools i need to use : how does the bluetooth works? is there a simple example ? the concept behind android GUI (i allready nade one but i think i am not fully understood his power)? note : i am using v 2.1

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  • Chrome: Flash Video Player doesn't work

    - by Patrick
    hi, could you explain me why my flash video player doesn't work in Chrome while it perfectly works in other browsers ? (Firefox and IE) This is the link: http://www.sanstitre.ch/drupal/portfolio?tid[0]=66 You'll see it flickering... thanks

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  • C# ASP.Net WebForm Membership Extra User Details (Profile)

    - by user1638362
    I'm learning how to use the ASP.net membership, when a user registers they just create a username and password, however i want to create a page on my website called "profile" where they can fill in extra details such as firstname, lastname, date of birth ect. However i don't see where i can place this in the asp.net membership database. Theres an asp.net_profile table however i'm not sure how this works. Could someone please explain how i can do this?

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  • grep options (unix)

    - by lego69
    hello everyone, can You explain please, can grep pick rows if at least one element from the list appeared, for exmaple grep "hello world" file1 grep must give me all rows which have or word hello or world or both of them, thanks in advance

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  • How are the concepts of process and threads implementated in Linux kernel?

    - by Shan
    Can any one explain how are the concepts of process and threads implemented in Linux kernel ? I am looking for an intuitive explanation with some C snippets ( and important data structures) that clearly distinguishes between the two. I am just looking for the key implementation ideas I should get hold off. Essentially, I want to understand them and implement something similar in an embedded target (not supporte by any OS) in C language.

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