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  • good practice for string.partition in python

    - by user1544915
    some case i write code like these: a,temp,b = s.partition('-') i just need to pick the first and 3rd element. temp would never be used. is there a better way to do this? the common case is ,a better way to pick separted element to make a new list? for example i want to make a new list use old list 0,1,3,7 element code would be this: newlist = [oldlist[0],oldlist[1],oldlist[3],oldlist[7]] it's pretty ugly,isn't it?

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  • Intermediate values in C++

    - by sterh
    Hello. I can not find how to implement a design in C++. In the language of Delphi in case the operator can write the following design: case s[j] of '0'..'9','A'..'Z','a'..'z','_': doSomeThing(); How can i do the same in c++. Attracts me is the construction type 'a' .. 'z' and etc... Thank you

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  • sqlite insert into: do the column names have to match?

    - by P a u l
    (This question is specific to SQLite3, but it may be common to all SQL I don't know.) This doesn't seem to work. Is it because the column names don't match? (If they match, it works.) If this is true, how can I select from a different field in the source table? INSERT INTO [ImagePoint] (ImageID, PointID, X, Y) SELECT Image2ID, PointID, X, Y FROM Point

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  • Any pitfalls using char* instead of void* when writing cross platform code?

    - by UberMongoose
    Is there any pitfalls when using char*'s to write cross platform code that does memory access? I'm working on a play memory allocator to better understand how to debug memmory issues. I have come to believe char*'s are preferable because of the ability to do pointer arithmetic and derefernce them over void*'s, is that true? Do the following assumptions always hold true on different common platforms? sizeof(char) == 1 sizeof(char*) == sizeof(void*) sizeof(char*) == sizeof(size_t)

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  • What's the best way to have functions share an array in Objective-C?

    - by editor
    I understand that in Objective-C you declare an array in the header file and interact with it in a class. So far I'm adding things and fetching them fine within a single function. I'm new to the language however and can't figure out how to share that array across other functions. I'd like to initialize array data in my viewDidLoad and access it from various functions later on. Is this possible and if so what's the best way to do it?

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  • Why are interfaces unusable in PHP?

    - by streetparade
    I mean an interface definition without defining the return type makes it unusable? This makes more Clear Interface run { public function getInteger(); } class MyString implements run { public function myNumber() { } public function getInteger() { return "Not a number"; } } In Java every Interface has a return type like Integer,String,Void I know that PHP is unfortunately a loosly typed Language but isnt there a Solution for that Problem? Is it Possible to defining a Interface with a Return type like Integer?

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  • Are there any data-binding solution that works in C++ and GWT and supports structures polymorphism?

    - by user116854
    I expect it should share a common description, like XmlSchema or IDL and should generate classes for target language. I found Thrift and it's really nice solution, but it doesn't support structures polymorphism. I would like to have collections of base class objects, where I could place instances of subclasses, serialize this and deserialize at the opposite side. Some mechanism of polymorphic behavior support, like Visitor, would be a perfect. Does anybody know something suitable for these requirements?

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  • Pin Control in HCS12

    - by Brian Lindsey
    A HCS12 microcontroller I had to buy for a class I had recently taken has 40 pins on the back side of it. The class was merely about computer organization, and so unfortunately, we never had a chance to cover all the capabilities of the chip itself. Now that the class is over, I have been thinking about using the to familiarize myself with the assembly language. I haven't found any sources that cover pin control and was wondering if anyone could possibly provide me with a hands-on pin tutorial.

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  • Windows Server 2003 provide network mutexes

    - by arpal
    Hi! I want to coordinate use of common files on Windows Server 2003 from two Windows XP Workstations. Does Windows Server 2003 provide network mutexes for this purpose? Are there any libraries of C functions to access to them? I couldn’t find such functions in Visual C++ 2008.

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  • Writing a script in Java?

    - by giri
    I am working with telecom company. I am familiar with Java programming language. But now I have a task to write a script, with Linux operating systems. I have to write a script for fetching data from other computer and check some conditions. How can I do that using Java?

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  • Classification question

    - by adam
    If php and ruby are languages, and cake and rails are frameworks, how do CMS like drupal and joomla fit into the scheme... can you use them in any language and any framework?

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  • Correct usage(s) of const_cast<>

    - by ereOn
    Hi, As a common rule, it is very often considered a bad practice to use const_cast<>() in C++ code as it reveals (most of the time) a flaw in the design. While I totally agree with this, I however wonder what are the cases were using const_cast<>() is ok and the only solution. Could you guys please give me some examples you know/you encountered ? Thank you very much.

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  • Suspend orientation change

    - by OkyDokyman
    Documentation says: "a configuration change (such as a change in screen orientation, language, input devices, etc) will cause your current activity to be destroyed, going through the normal activity lifecycle process of onPause(), onStop(), and onDestroy()." I would like to suspend the orientation change, since it crashes my app if it was done in the middle of a a loop (of reading a file). How can I do this? Also - looking for some kind of "onOrientationChnage" function :)

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  • Creating a good search solution

    - by Daniel
    I have an app where users have a role,a username,faculty and so on.When I'm looking for a list of users by their role or faculty or anything they have in common I can call (among others possible) @users = User.find_by_role(params[:role]) #or @users = User.find_by_shift(params[:shift]) So it keeps the system Class.find_by_property So the question is: What if at different points users lists should be generated based on different properties.I mean: I'm passing from different links params[:role] or params[:faculty] or params[:department] to my list action in my users controller.As I see it all has to be in that action,but which parameter should the search be made by?

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  • Regular expression on range

    - by user1515425
    Sorry for these silly Question but i couldn't find a clue on my own I am a beginner at regexp language and I want someone help to find and replace the following value in content-range Http=Header Content-Range: bytes x-xxxxx/xxxx i want to find the xxxx value and replace it with yyyyy so the value will be x-xxxxxx/yyyy for example 0-423423/7777777 to be 0-423423/9999999 Can anyone help me in it thanks in advance

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  • Why do @synthesize variable names begin with an _?

    - by mcjoejoe0911
    I'm just starting to use Objective-C and I need to clarify something When I @synthesize a @property, it is common convention to do the following: @interface Class : ParentClass @property propertyName @end @implementation @synthesize propertyName = _propertyName; @end I've seen plenty of questions and answers suggesting that "_propertyName" is widely accepted as the "correct" way to synthesize properties. However, does it serve ANY purpose? Or is it merely to increase readability and identify instance variables?

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  • has c++ outlived its usefulness? [closed]

    - by user303030
    With the advent of more powerful computers and the difficulties with memory management, pointers and archaic mechanisms for constructing functions and classes, has C++ outlived its usefulness? Have the problems and challenges with development made this language too difficult to understand?

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  • How to resolve %CommonProgramFiles%\system\

    - by Faisal
    I have a situation where I need to return a directory path by reading the registry settings. Registry value returns me a path in the format %CommonProgramFiles%\System\web32.dll while the consumer code is expecting it in the format C:\Program Files\Common Files\System\web32.dll How can I resolve such directory path in .net code?

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