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  • Iterator not accessible because of private inheritance

    - by Bo Tian
    I've created a new class that composes std::deque by private inheritance, i.e, class B : private std::deque<A> { ... }; and in my source code I tried to use iterator of B, i.e., B::iterator it The compiler error is error C2247: 'std::deque<_Ty>::iterator' not accessible because 'B' uses 'private' to inherit from 'std::deque<_Ty>' So the question is, how can I make the iterator accessible?

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  • Java Interger: what is faster comparison or subtraction?

    - by Vladimir
    I've found that java.lang.Ingteger implementation of compareTo method looks as follows: public int compareTo(Integer anotherInteger) { int thisVal = this.value; int anotherVal = anotherInteger.value; return (thisVal<anotherVal ? -1 : (thisVal==anotherVal ? 0 : 1)); } The question is why use comparison instead of subtraction: return thisVal - anotherVal;

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  • How to store a scaleable sized extensible event log?

    - by firoso
    Hello everyone! I've been contemplating writing a simple "event log" that takes a paramater list and stores event messages in a log file, trouble is, I forsee this file growing to be rather large (assume 1M entries or more) the question is, how can I implement this system without pulling teeth, I know that SQL would be a possible way to go. XML would be ideal but not really practical for scaleability if i'm not going nuts. Example Log Entry -----Time Date-------- ---------Sender----------------------- ---------Tags---------- --Message---------- 12/24/2008 24:00:00 $DOMAIN\SYSTEM\Application$ :Trivial: :Notification: It's Christmas in 1s

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  • Strongly typed `enum`s in VS10?

    - by Motti
    This question pointed to a wiki page for C++0x support which lists Strongly typed enums as Partially supported in VS10. However this creates a compilation error: enum class boolean { no, yes, maybe }; Any idea what constitutes partial support when the basic syntax isn't accepted?

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  • When not to do maximum compression in png?

    - by user1444680
    Intro When saving png images through GIMP, I've always used level 9 (maximum) compression, as I knew that it's lossless. Now I've to specify compression level when saving png format image through GD extension of PHP. Question Is there any case when I shouldn't compress PNG to maximum level? Like any compatibility issues? If there's no problem then why to ask user; why not automatically compress to max?

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  • Most popular mobile platform to develop on?

    - by Mohit Deshpande
    This question may not directly relate to programming. I have noticed that the technology of today has gone mobile. I want to go mobile with it. What is the most popular mobile OS?(excluding iPhone OS. Sorry, I don't have a Mac to develop on) Some choices could be BlackBerry OS, Windows Phone, Symbian OS, Android OS, etc. I want to make and sell applications for a mobile OS.

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  • cyrtsal report how to hide records based on condition of a field like date

    - by hatemgamil
    hi all i have a question about hiding records in crystal report and i am using cyrstal report in vs 2008 ,i dont know its version as i am new in crystal reporting lets say i have report like that customer_Id customer_name OrderAmount Order_date 0 xyz 5 03/02/2010 1 abc 6 04/02/2010 3 dre 7 07/02/2009 4 kila 3 08/02/2009 i wana ask is there a pssibilty to hide the record if Order_Date year in 2009 and show only the records where Order_date year in 2010 to be like that : customer_Id customer_name OrderAmount Order_date 0 xyz 5 03/02/2010 1 abc 6 04/02/2010 **note i do need the data of 2009 to make a bar chart for this year thanks in advance

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  • Escape SQL "LIKE" value for Postgres with psycopg2

    - by Evgeny
    Does psycopg2 have a function for escaping the value of a LIKE operand for Postgres? For example I may want to match strings that start with the string "20% of all", so I want to write something like this: sql = '... WHERE ... LIKE %(myvalue)s' cursor.fetchall(sql, { 'myvalue': escape_sql_like('20% of all') + '%' } Is there an existing escape_sql_like function that I could plug in here? (Similar question to How to quote a string value explicitly (Python DB API/Psycopg2), but I couldn't find an answer there.)

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  • Saving all posts to .NET WebService in XML to DB

    - by Nic
    I am sure this is an easy question however I am not finding the solution. I want to save the XML files posted to my .NET Web Service. I am sure it is just a simple method call when the service is invoked but I am not finding it. I would like to save the full XML posted to the service Any help would be greatly appreciated. Thank you in advance.

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  • How do I add NSDecimalNumbers?

    - by Terry B
    OK this may be the dumb question of the day, but supposing I have a class with : NSDecimalNumber *numOne = [NSDecimalNumber numberWithFloat:1.0]; NSDecimalNumber *numTwo = [NSDecimalNumber numberWithFloat:2.0]; NSDecimalNumber *numThree = [NSDecimalNumber numberWithFloat:3.0]; Why can't I have a function that adds those numbers: - (NSDecimalNumber *)addThem { return (self.numOne + self.numTwo + self.numThree); } I apologize in advance for being an idiot, and thanks!

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  • Using psexec to start Internet Explorer then navigate to a particular URL

    - by UnclePaulie
    Just like the question says, I want to be able to use psexec to start Internet Explorer, then load a particular website in the browser. I know how to start IE, just can't make a command that goes to a particular webpage. This is what I have so far: psexec "C:\program files\Internet Explorer\iexplore.exe" I just can't figure the syntax for loading anything other than the default start page Thanks!

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  • Xcode best audio practices

    - by Zachary Webert
    What is the best practice for creating an audio prompt within my app, which will append different portions of audio together to ask a question? ex. "What is" + "foo"? "What is" + "bar"? I have developed a "AudioQueue" object using audiotool box which uses AudioServicesPlaySystemSound() and it is working perfectly. Is there anything wrong with playing this type of audio through the alert system. If so what are my alternatives?? Thank you

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  • How can I specify a relative path in a Python logging config file?

    - by ClaudioA
    I've the following file to config logging: [loggers] keys=root [handlers] keys = root [formatters] keys = generic # Loggers [logger_root] level = DEBUG handlers = root # Handlers [handler_root] class = handlers.RotatingFileHandler args = ("test.log", "maxBytes=1*1024*1024", "backupCount=10") level = NOTSET formatter = generic # Formatters [formatter_generic] format = %(asctime)s,%(msecs)03d %(levelname)-5.5s [%(name)s] %(message)s datefmt = %Y-%m-%d %H:%M:%S In Development this works great, but when I deploy the application test.log is trying to be written in a path in which I don't have the necessary permission. So my question is, How can I do to specify a relative path in this configuration file.

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  • How to Keep to GPL Licence When Modifying a Script

    - by MagicAndi
    Hi, In answering my own question, I came across this GreaseMonkey script that automatically converts currency values on a webpage. I would like to modify the script for my specific case, and I want to know how I should modify the script MetaData block to acknowledge the script's original author and respect the (letter and spirit of the) GPL. Can anyone advise? Thanks, MagicAndi

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  • How can I use "FOR UPDATE" with a JOIN on Oracle?

    - by tangens
    The answer to another SO question was to use this SQL query: SELECT o.Id, o.attrib1, o.attrib2 FROM table1 o JOIN ( SELECT DISTINCT Id FROM table1, table2, table3 WHERE ... ) T1 ON o.id = T1.Id Now I wonder how I can use this statement together with the keyword FOR UPDATE. If I simply append it to the query, Oracle will tell me: ORA-02014: cannot select FOR UPDATE from view Do I have to modify the query or is there a trick to do this with Oracle? With MySql the statement works fine.

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  • How a programmer should motivate himself ?

    - by Indigo Praveen
    Hi All, The question came into my mind because from last 2-3 months I am feeling a kind of bored in my job. Actually there is nothing happening in the project, I just have to create some class , properties and some small routines to do some functionality. I hope you guys must have gone through this phase as well in your career. Please share your experience how did you motivate yourself in this kind of situation ?

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  • popups in asp.net

    - by Surya sasidhar
    hi, i want to display the pop ups in asp.net page like how the stack over flow show the pop ups on the top of the site (you get the new answer for the question like that in a orange color) how can i write the code is there any free source code or any reference. thank you

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  • How can I change the color of xterm titlebar?

    - by tellus55
    Hi, I want to automatically change the color of my xterm titlebar. I would like to put code into my .bashrc so that the color changes automatically (say depending on the directory I am in). I know how to change the prompt and also how to change the text displayed in the titlebar. My question is about the color of the titlebar. Right now the color is orangish. I am using Ubuntu. Thanks

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  • Design considerations for a multi-language web application

    - by gAMBOOKa
    I was asked by an interviewer today how I would implement Arabic as a second language into a PHP web application. I talked about choosing a unicode encoding for the database and the front-end, and designing RTL friendly user interface modules. And he didn't seem too happy with the answer. I don't really know anything about multi-lingual systems, how would you have answered that question?

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