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  • C++ exam question on string class implementation

    - by Carlucho
    I just took an exam where i was asked the following: Write the function body of each of the methods GenStrLen, InsertChar and StrReverse for the given code bellow. You must take into consideration the following; How strings are constructed in C++ The string must not overflow Insertion of character increases its length by 1 An empty string is indicated by StrLen = 0 class Strings { private: char str[80]; int StrLen; public: // Constructor Strings() { StrLen=0; }; // A function for returning the length of the string 'str' int GetStrLen(void) { }; // A function to inser a character 'ch' at the end of the string 'str' void InsertChar(char ch) { }; // A function to reverse the content of the string 'str' void StrReverse(void) { }; }; The answer I gave was something like this (see bellow). My one of problem is that used many extra variables and that makes me believe am not doing it the best possible way, and the other thing is that is not working.... class Strings { private: char str[80]; int StrLen; int index; // *** Had to add this *** public: Strings(){ StrLen=0; } int GetStrLen(void){ for (int i=0 ; str[i]!='\0' ; i++) index++; return index; // *** Here am getting a weird value, something like 1829584505306 *** } void InsertChar(char ch){ str[index] = ch; // *** Not sure if this is correct cuz I was not given int index *** } void StrRevrse(void){ GetStrLen(); char revStr[index+1]; for (int i=0 ; str[i]!='\0' ; i++){ for (int r=index ; r>0 ; r--) revStr[r] = str[i]; } } }; I would appreciate if anyone could explain me toughly what is the best way to have answered the question and why. Also how come my professor closes each class function like " }; " i thought that was only used for ending classes and constructors only. Thanks a lot for your help.

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  • Returning modified data to a template

    - by Duncan
    I need to amend QuerySet data when i return it to a template. for example, model.objects.all() returns a date (with other fields), but i also want to return the number of days since that date has passed. This is so that in the template, i can say "you last logged in 4 days ago". What is the best way to do this?

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  • Facebook Connect in Silverlight

    - by Mike Pateras
    Is there a good way to get Facebook Connect onto a Silverlight page? All I really need is simple authorization/registration. I've looked into the facebook developer toolkit, but the documentation is more or less non-existent for Silverlight, and I didn't really get anywhere with it. Is there a good tutorial or a working library for adding Facebook Connect into a Silverlight app? Or is the best way to run Silverlight in Windowwless mode with HTML overlayed on top?

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  • Send and receive data in same ajax request with jquery

    - by Pedro Esperança
    What is the best way to send data and receive a response dependent on that data? Consider the php file used for the request: $test = $_POST['test']; echo json_encode($test); I have tried unsucessfully to achieve this with: $.ajax({ type: "POST", dataType: "json", data: '{test : worked}', url: 'ajax/getDude.php', success: function(response) { alert(response); } });

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  • Can one read a remote file as an istream with libcurl?

    - by jobu
    I'd like to use the libcurl library to open a remote date file and iterate through it with an istream. I've looked through the nice example in this thread but it writes the remote file to a local file. Instead I'd like to have the remote reads be pushed to an istream for subsequent programmatic manipulation. Is this possible? I would greatly appreciate help. Best, Aaron

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  • How to initiate JavaScript Callback with MVC2 using RenderAction

    - by Zacho
    I am building a dashboard where I am iterating through a list of controls to render, and I need to initiate a general callback both after each control and after they are all completed. I was curious what the best way to handle this is. I can get the control specific callback fired off by placing myUserControlCallback(); in the user control itself. I'm just not sure how to run something like allControlsRendered();. Any ideas?

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  • What video encoder services do you use with s3?

    - by Trip
    We were using FFmpeg which is free. And when a bug occurred that broke the system, a previous developer installed PandaStream. My question is, what do you recommend for quality video encoders? Is it best to stick with ffmpeg and keep it free, or does a small website really need a heavy duty service like Panda?

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  • Is an editable select box the right way?

    - by Neil Middleton
    I have a scenario where a user is emailing another user in an HTML based web app. For the To: field, the user may select one of a pre-defined list of emails OR enter their own ignoring the pre-defined options. What would be the best way of doing this from a UI point of view? I've looked at editable select boxes using jQuery but none seem to let you enter your own option. Is there some other UI mechanism that would work here?

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  • Log4j Properties in a Custom Place

    - by Azder
    I'm using Apache Commons Logging and SLF4J with log4j, but I also want to use the log4j.properties in a custom place like conf/log4.properties. Here is the problem: If i use PropertyConfigurator.configure("conf/log4j.properties"); then my app is tied to log4j and defets the purpose of having ACL and SLF4J. What is the best way to configure it withouth the app ever knowing what the logging implementation is?

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  • Trouble adding event listeners via JavaScript

    - by Jack Roscoe
    Currently I have a function which loops to create multiple HTML objects. Each time an object is created, I want to add an onClick function listener to that object so that I can trigger a function when each one is clicked. What's the best way to do this? Here's the code which creates my objects: RenderMultipleChoice:function() { this.c = paper.rect(this.x, this.y, this.shapeWidth, this.shapeHeight); }

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  • how to convince website users to use openid

    - by isolatedIterator
    Perhaps this isn't the best forum for this question. If so, would one of the other child sites be more suitable? I am wondering how to overcome the learning curve of convincing a non-technical bunch of users how and what open id is. how do you convince users that it is a good thing and that they want to use it?

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  • How to add a constructor to a subclassed numeric type?

    - by abbot
    I want to subclass a numeric type (say, int) in python and give it a shiny complex constructor. Something like this: class NamedInteger(int): def __init__(self, value): super(NamedInteger, self).__init__(value) self.name = 'pony' def __str__(self): return self.name x = NamedInteger(5) print x + 3 print str(x) This works fine under Python 2.4, but Python 2.6 gives a deprecation warning. What is the best way to subclass a numeric type and to redefine constructors for builtin types in newer Python versions?

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  • How should I migrate a site from ZWiki to MediaWiki?

    - by Dan L
    I have a fairly extensive wiki on ZWiki on Zope (in turn on Plone). Most pages are in reStructured text format, but there are several in straight HTML as well. What is the best approach to migrate those pages over to a MediaWiki wiki with pages converted to MediaWiki and HTML formats? Of course I'd like to automagically convert all links (internal and external).

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  • Formatting this JavaScript Line

    - by dkris
    Hi, I am trying to format this line of code in my popup window, but i am facing unterminated string literal error. Can somebody please tell me how best I could format this. window.setTimeout("winId.document.write('<script src="../js/tiny_mce/tiny_mce.js" type="text/javascript"></script>\n')", 10); Also point out if this particular line of code would work fine in the popup?

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  • Silverlight - round doubles away from zero

    - by Cornel
    In Silverlight the Math.Round() method does not contain an overload with 'MidpointRounding' parameter. What is the best approach to round a double away from zero in Silverlight in this case? Example: Math.Round(1.4) = 1 Math.Round(1.5) = 2 Math.Round(1.6) = 2

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  • Writing a windows web service and not sure what language to use?

    - by badpanda
    So I am required to write a fairly basic Windows service and have never done so before. Of C#, C++ (the Visual Studio suite), what is the best language to develop in? I am a student, and am most familiar with OO languages such as Java. Additionally, if anyone can recommend any books, articles, or google searches that would be relevant to the project I would greatly appreciate it. Thanks! badPanda

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  • vim regex for replacing spaces within quotes

    - by vikram-bhat
    I have text in the follwing format: ERR_OUT_OF_MEM, "ERR OUT OF MEM" ERR_SOMETHING_BAD, "ERR SOMETHING BAD" I want to replace all spaces in the text which are within quotes with underscores: ERR_OUT_OF_MEM, "ERR_OUT_OF_MEM" ERR_SOMETHING_BAD, "ERR_SOMETHING_BAD" The best regex I could come up with is: \("\w\+\)\@<= (there's a space at the end of that) but this only finds the first space in each quoted string, and I would need to repeat this multiple times to get the desired effect. Any way to do it in one shot? Thanks!

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  • Read file as its being uploaded

    - by zaf
    By default you cannot access a file that is uploaded until it has been fully transferred to the server. What is the best way to get round this and be able to access the 'byte stream' as the file upload is in progress?

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