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• Declaration of pointers in C++

  - by user265260

  In C++ whats the difference between char const *ptr=&ch; and const char *ptr=&ch;

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• How to prevent regex from stopping at the first match of alternatives ?

  - by miket2e

  If I have the string hello world , how can I modify the regex world|wo|w so that it will match all of "world", "wo" and "w" rather than just the single first match of "world" that it comes to ? If this is not possible directly, is there a good workaround ? I'm using C# if it makes a difference: Regex testRegex = new Regex("world|wo|w"); MatchCollection theMatches = testRegex.Matches("hello world"); foreach (Match thisMatch in theMatches) { ... }

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• On Android, app jumps back to default Page on orientation change

  - by SteAp

  I tested my Xamarin.Forms app on iOS and Android and found this difference when I change the orientation of the mobile device: On iOS, the app keeps the current page On Android, the app seems to restart using the default page (or probably pop all pages except the first one). Since I've never seen this behavior in another Android app, I'd like to disable it. Moreover, I don't think that this behavior is Android default. Which property do I need to set the make the Android target behave as the iOS target?

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• Flex AdvanceDatagrid

  - by udara

  What is the difference between normal datagrid and advance datagrid.Sorting,draging columns,resizing columns are supported even in normal datagrid. I want to add footer details like summery,average etc of each column,does AdvanceDataGrid supports these features?

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• Php_value memory_limit? what happens if increased?

  - by DAVID

  Hi guys i have this in my htaccess file, i was wondering what is it for ? what happens if i increase it to say 128mb or 16mb what difference would it make

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• Class hierarchy of objective c in iphone -for xcode

  - by vijay

  i want to know what is the hierarchy we have in xcode first we have to get window and from that i have to understand completely if i use the class as property of another like this //child inherits the parents @interface child:parent { // parent *parentobject; child *child; } then what is the difference b/w the class behaviour while using the as property for another class then what is contrast between the inheritance and property

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• In Ruby why won't `foo = true unless defined?(foo)` make the assignment?

  - by LeftHem

  What's going on here? What is the subtle difference between the two forms of "unless"? > irb(main):001:0> foo = true unless defined?(foo) => nil irb(main):002:0> unless defined?(fooo) ; fooo = false ; end => false thx

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• How to develop a MVC framework from scratch?

  - by user198729

  View is easy to be separated from MC, but how to separate M and C?The difference seems a little vague to me. I'm using PHP.

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• How do I stop Chrome from pre-populating input boxes?

  - by thor

  Is there some way I can stop Chrome from auto populating input boxes? I have a page with a Sign Up form and a Log In form. In Chrome, if a user has already signed up and they've come to this page to log in, the password input box on the sign up form is populated with their password. I would really like to force the sign up fields to never auto complete. I've tried setting autocomplete="false" but this makes no difference.

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• Twitter Bootstrap: How to make top fixed navbar stay in container and not stretch?

  - by Jryl

  I'm working with Twitter Bootstrap and the regular navbar you see in the guides: http://twitter.github.io/bootstrap/components.html#navbar I don't want the navigation to stretch all the way left or right but stay where I can see both sides just like in the guide. The only difference is it would be fixed to the top. I was wondering, how do I make this become a fixed navbar as if I was using the navbar-fixed-top class?

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• Google App Engine - Delete until count() <= 0

  - by user365918

  What is the difference between these 2 pieces of code? query=Location.all(keys_only=True) while query.count()>0: db.delete(query.fetch(5)) # -- while True: query=Location.all(keys_only=True) if not query.count(): break db.delete(query.fetch(5)) They both work.

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• Why is Python so slow?

  - by Riemannliness

  Why is Python such a slow language, on average, compared to C/C++? I learned Python as my first programming language, but I've only just started with C and already I can feel and see the difference.

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• different types of parsing

  - by kostas_menu

  I have read the tutorial from ibm about xml parsing (http://www.ibm.com/developerworks/opensource/library/x-android/) In this example,there are four types of xml parsing.Dom,Sax,Android Sax and xml_pull.Could you please tell me what's the difference between these four types and when i have to use each one? Also,with every way of xml parsing in this tutorial,the feeds are shown in a listView. What i have to do in order to appear every announcement in a btn for example? thanks for your time!Merry Christmas:D

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• Handling large numbers of sockets with .NET

  - by Dreaddan

  I'm looking at writing a application that need to be able to handle in the region of 200 connections / sec and was wondering if C# and .NET will handle this or if I need to really be looking at C++ to do this? It looks like SocketAsyncEventArgs may be the way to go but thought id check before I plough in to it. Each transaction should only last less than a second but could take up to 15 seconds each if that makes any difference.

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• if `int != 1` or `int == 0`?

  - by Emil

  Hey. I was coding here the other day, writing a couple of if statements with ints that are always either zero or one (~bools), and I asked myself: Should I use if (int == 1) or if (int != 0) ? Is there any difference at all? Please, don't answer with stuff regarding the int may being more/less than 1/0, that's not what I want to know.

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• $_POST vs. $_SERVER['REQUEST_METHOD'] == 'POST'

  - by Scott

  Some guy called one of my Snipplr submissions "crap" because I used if ($_SERVER['REQUEST_METHOD'] == 'POST') instead of if ($_POST) Checking the request method seems more correct to me because that's what I really want to do. Is there some operational difference between the two or is this just a code clarity issue?

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• Visual Studio 2010 ADO.NET Data Model vs Linq to SQL

  - by LaGrad

  What's the difference between the two? They seem to have the same functionality at first glance. Which one has faster performance which one is easier to use?

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• Determining if an item is a string or a list in Erlang

  - by Zubair

  I am writing a program that can have either a list or a string as an argument. How can I tell the difference between a string and a list programmatically in Erlang. Something like: print(List) -> list; print(String) -> string.

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• Should i use a C function or Obj-C Method?

  - by Daniel Granger

  I'm about to create a function which adds to NSDateComponents together is there any advantage to putting this in a C style function or should it go in a Obj-C method? Is there ever a reason to use one rather then the other or should I always stick to Obj-C? BTW: Not that it makes any difference I'm sure but this is for an app on the iPhone Many thanks

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• Need to write a daemon in linux, not sure what to use C++ or C

  - by Bluescrod

  Hello everyone, I have a little problem picking the right language to write my daemon, I am confused between C and C++, I want to use C++ because it is more expanded than C, but I want to use C because it is the starting point of everything in linux, I want to go for C++ as I have many resources about it, so, does it make any difference if I pick C++ instead of C? and what I will have good if I learn C more? I feel like if I go into C++ I will cover C within C++... Regards

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• pop3 multiline problem

  - by stupid_idiot

  hi everyone, i'm making a client for pop3 and somehow i can't figure out how to handle multiline responses. There is no difference in the first response from server whether it is single or multiline, it always ends with CRLF (considering the usual case) so how do I do I know if I should call recv() once more?

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• What are the differences between various threading synchronization options in C#?

  - by user38834

  Can someone explain the difference between: lock (someobject) {} Using Mutex Using Semaphore Using Monitor Using Other .Net synchronization classes I just can't figure it out. It seems to me the first two are the same?

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• Is C# 4.0 backward compatible to C# 2.0?

  - by CMW

  Hi, May I know what is the difference between C# 4.0 and C# 2.0? Is C# 4.0 backward compatible to C# 2.0? Can I say that C# 4.0 is a superset of C# 2.0 (just like what C++ is to C)? Thanks.

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• delete vs NULL in c++

  - by hero

  what is the difference between deleting a pointer and setting it to null. delete ptr; ptr=NULL;

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• delete vs NULL vs free in c++

  - by hero

  what is the difference between deleting a pointer and setting it to null and freeing it. delete ptr; ptr=NULL; free(ptr);

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