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• stl string return by const reference vs. const char*

  - by user342673

  i have a STL string member variable in my class, class A { public: const char* getData1() const { return data.c_str()); const string& getData2() const { return _data; } private: string _data; }; getData1() vs. getData2(), which one is better?

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• How to Pass URL param in form on submit?

  - by adamwstl

  I have <form name="feedback" method="post" onsubmit="return checkform()" action="engine.php?ad="> and I need to append a variable to engine.php?ad=, which is <?=$_GET['page'];?> in php (pass a URL param to the next page using this.) How would I go about adding that? I also have it in javascript if needed.

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• Is there a way to read an .ini file into memory and then read particular values from it?

  - by Clay Nichols

  I've got a situation where an ini file is in memory (in a string variable) and I'd like to read values out of it without writing the ini file data to disk. Is there any way to do that in VB6? Maybe with a Win API call?

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• How do I create a multiline textbox that adjusts the height automatically when the window is resized

  - by tmim

  I have an xul file with a multiline textbox. When I resize the window, its width changes but its height is constant. How do I make its height variable?

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• Is there any C/C++ editor in Linux that shows errors while typing

  - by MetallicPriest

  The Visual C++ editor has a great feature which is that it underlines errors with a red line while typing the code. So for example, if you are using a variable that is not declared, it will underline it with a red curly line. In this way, the programmer can resolve a lot of errors while typing and doesn't have to wait for compiling for noticing them. Now my question is, is there any editor for Linux that has this great feature?

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• Evaluate empty or null JSLT c tags

  - by user338381

  How can I validate a String null or empty using the c tags of JSLT. I have a variable of name var1 and I can display it, but I want to add a comparator for validate it. I want to validate when is different of null or empty (my values are string).

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• python 3 self class dict

  - by Jjang

  I am trying to create my own class of dictionary in python 3 which has a field of dict variable and setitem and getitem methods. Though, it doesnt work for some reason. Tried to look around but couldn't find the answer. class myDictionary: def __init(self): self.myDic={} def __setitem__(self, key, value): self.myDic[key]=value I'm getting: 'myDictionary' object has no attribute 'myDic' Any ideas? :)

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• C++ function dynamic data type definition

  - by user330352

  Hi all, in C++, when you define a function which takes one argument, you have to define the data type of that variable: void makeProccess(int request) However, I want to implement a function which takes different data types rather taking statically defined integer type. void makeProccess(anyType request) How can I design a proccess like this, any idea? Thanks.

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• Display different iphone views depending on logged in status

  - by user330936

  I want to display a login view to my users if they are not logged in and the main view if they are. In my header file I define a variable to hold the logged in status #define loggedIn 0 I figure I should then reference this in the initWithNibName method and then decide which nib to load. Is the right way of doing it? If so can someone help me out with the exact code? Thanks for any help

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• SQLite Select an id which is smaller than a number

  - by user345039

  Hi, I am trying to only select the objects where the id is smaller than an int value. e.g.: i have 3 objects - id = 1, id = 2, id = 3 Now I want to only get the objects with the id smaller than the variable i = 2; How can I manage this? sql = "SELECT id FROM table_name WHERE id <= i"; Thanks ;-)

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• How to check the existence of a row in SQLite with Python?

  - by fx

  I have the cursor with the query statement as follows: cursor.execute("select rowid from components where name = ?", (name,)) I want to check for the existence of the components: name and return to a python variable. How do I do that?

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• correct function parameters designation

  - by david

  Every time i pass some parameters to a JavasScript or jQuery functon, i use some random letters. What are the correct letters for the corresponding variable types? function(o){} for example is for a object. But what are the other letters? Do someone have a list of those?

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• Difference between B b and A<B> b.

  - by chitresh

  Assume class B extends class A and I want to declare a variable for B. What is more efficient and why? B b OR A<B> b.

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• how to store int data type in bool?

  - by shak

  i want to read a file which consists of 1's and 0's in each line, how do can i store a false in any bool variable after reading 0 from the file. language c++

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• Terminating a long-executing thread and then starting a new one in response to user changing parameters via UI in an applet

  - by user1817170

  I have an applet which creates music using the JFugue API and plays it for the user. It allows the user to input a music phrase which the piece will be based on, or lets them choose to have a phrase generated randomly. I had been using the following method (successfully) to simply stop and start the music, which runs in a thread using the Player class from JFugue. I generate the music using my classes and user input from the applet GUI...then... private playerThread pthread; private Thread threadPlyr; private Player player; (from variables declaration) public void startMusic(Pattern p) // pattern is a JFugue object which holds the generated music { if (pthread == null) { pthread = new playerThread(); } else { pthread = null; pthread = new playerThread(); } if (threadPlyr == null) { threadPlyr = new Thread(pthread); } else { threadPlyr = null; threadPlyr = new Thread(pthread); } pthread.setPattern(p); threadPlyr.start(); } class playerThread implements Runnable // plays midi using jfugue Player { private Pattern pt; public void setPattern(Pattern p) { pt = p; } @Override public void run() { try { player.play(pt); // takes a couple mins or more to execute resetGUI(); } catch (Exception exception) { } } } And the following to stop music when user presses the stop/start button while Player.isPlaying() is true: public void stopMusic() { threadPlyr.interrupt(); threadPlyr = null; pthread = null; player.stop(); } Now I want to implement a feature which will allow the user to change parameters while the music is playing, create an updated music pattern, and then play THAT pattern. Basically, the idea is to make it simulate "real time" adjustments to the generated music for the user. Well, I have been beating my head against the wall on this for a couple of weeks. I've read all the standard java documentation, researched, read, and searched forums, and I have tried many different ideas, none of which have succeeded. The problem I've run into with all approaches I've tried is that when I start the new thread with the new, updated musical pattern, all the old threads ALSO start, and there is a cacophony of unintelligible noise instead of my desired output. From what I've gathered, the issue seems to be that all the methods I've come across require that the thread is able to periodically check the value of a "flag" variable and then shut itself down from within its "run" block in response to that variable. However, since my thread makes a call that takes several minutes minimum to execute (playing the music), and I need to terminate it WHILE it is executing this, there is really no safe way to do so. So, I'm wondering if there is something I'm missing when it comes to threads, or if perhaps I can accomplish my goal using a totally different approach. Any ideas or guidance is greatly appreciated! Thank you!

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• htaccess url rewrite with multiple variables in url

  - by Cata

  Hello, I want to make some url rewrite rules on my .htaccess file so that this link: http://myseite.com/index.php?var1=value1&var2=value2 will become : http://myseite.com/var1/value2.html So far I have managed successfully to solve this problem but only for one variable. I also tried this code: RewriteRule ^([^/]*)/([^/]*)\.html$ /index.php?var1=$1&var2=$2 [L] But it doesn't work.. Thank you for the help!

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• Dynamic allocation in C

  - by Kerby82

  I'm writing a program and I have the following problem: char *tmp; sprintf (tmp,"%ld",(long)time_stamp_for_file_name); Could someone explain how much memory allocate for the string tmp. How many chars are a long variable? Thank you, I would appreciate also a link to an exahustive resource on this kind of information. Thank you

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• Is it safe to read global data from multiple threads?

  - by user362515

  The scenario is as follows: Create an instance of a class (std::map) and sore it as global variable. Spawn threads. Threads read and use the same global instance of the class All spawned threads quit Global class instance is destroyed No mutex, no thread modifies the global class instance. Is this OK? Thank You

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• Strange ruby syntax

  - by AntonAL

  Hi, what the syntax is in Action Mailer Basics rails guide ? class UserMailer < ActionMailer::Base def welcome_email(user) recipients user.email from "My Awesome Site Notifications <[email protected]>" subject "Welcome to My Awesome Site" sent_on Time.now body {:user => user, :url => "http://example.com/login"} end end How should i understand the construction, like from "Some text for this field" Is it an assignment the value to a variable, called "from" ?

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• Is it possible to use 'variables' for css / html element ?

  - by stighy

  Hi, i would like to make 'skinnable' a web site written in asp.net... I explain: for example, i have a 'div' element, and i would like to define a background-color using a variable, not a fixed value. How can i do ? Css ? Or other tecniques ? Thanks

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• piping to variables

  - by lego69

  cut -d" " -f2 ${2} | $callsTo hello, can somebody please explain can I pipe the result of cut to variable callsTo, and how will it be stored, as the string or list?

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• Does Oracle have an equivalent of SQL Server's table variables?

  - by Margaret

  In SQL Server, you can declare a table variable (DECLARE @table TABLE), which is produced while the script is run and then removed from memory. Does Oracle have a similar function? Or am I stuck with CREATE/DROPs that segment my hard drive?

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• Values of Integers and Calculations

  - by inferno2991

  Say you have a variable n1 which will be the value of three digits entered how can i then without knowing what exactly will be input split n1 into 3 seperate integers to do futher calculations with?

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• implementing custom timeline with notifications

  - by user299233

  Hello, I am using compositionTarget_rendering function to do some stuff in silverlight. Now I want to implement some kind of timelime, with notifications, i.e add some markers, and when a variable X reaches the marker value, an event is raised .. How should be the best way to do this? Thanks in advance

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• writing string into file before calling the close()

  - by navinbecse

  I am using ofstream() to write data into file, i want to program to perform such a way that it should be keep on writting the string into the file as soon as the value gets assingned to string variable, and it should be writting before calling the close() for the buffer and while the program runs itself. can anyone help me to do that in c++.........

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