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  • Memory leak using shared_ptr

    - by nabulke
    Both code examples compile and run without problems. Using the second variant results in a memory leak. Any ideas why? Thanks in advance for any help. Variant 1: typedef boost::shared_ptr<ParameterTabelle> SpParameterTabelle; struct ParTabSpalteData { ParTabSpalteData(const SpParameterTabelle& tabelle, const string& id) :Tabelle(tabelle), Id(id) { } const SpParameterTabelle& Tabelle; string Id; }; Variant 2: struct ParTabSpalteData { ParTabSpalteData(const SpParameterTabelle& tabelle, const string& id) :Id(id) { // causes memory leak Tabelle2 = tabelle; } SpParameterTabelle Tabelle2; string Id; };

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  • Instantiating a context in LINQ to Entities

    - by Jagd
    I've seen two different manners that programmers approach when creating an entity context in their code. The first is like such, and you can find it all over the MSDN code examples: public void DoSomething() { using TaxableEducationEntities context = new TaxableEducationEntities()) { // business logic and whatever else } } The second is to create the context as a private attribute in some class that encapsulates your business logic. So you would have something like: public class Education_LINQ { private TaxableEducationEntities context = new TaxableEducationEntities(); public void DoSomething() { var result = from a in context.luAction select a; // business logic and whatever else } } Which way is more efficient? Assume that you have two methods, one called DoSomething1() and another called DoSomething2(), and both methods incorporate the using statement to open the context and do whatever with it. Were you to call one method after the other, would there be any superfluous overhead going on, since essentially both methods create the context and then clean it up when they're done? As opposed to having just one private attribute that is created when a class object is instantiated, and then in turn cleaned up when the object goes out of scope?

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  • How to log in to a website using installed twill?

    - by brilliant
    Hello, everybody!!!! I have just successfully installed TWILL on my computer with the help of one very supportive member of "StackOverflow" (you can check it out HERE) and have tried to run one of the simple examples on the twill documentation page (you can see that page HERE). Here is that example: Let's say my username on www.slash.org is lynxye and my password is mammal. When I try to enter that example code into my Python prompt, I can only type and enter the first line of the code because when I click on "Enter" to start a new line, I get some error messages right away: The same happens when I try to enter this code into my terminal: I think I miss out on some basics here. Perhaps, I need to create a file that would contain that code and then run that file somehow, but I really don't know where I need to create that file and with what extensdion. Can anyone, please, help me with this?

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  • Element binding in Silverlight

    - by Matt
    Where can I find some good documentation on data/element binding? My Google searches haven't turned much up. I had a custom class with two properties named Text and Value. When I tried binding a list to a listbox it wouldn't work. By chance I modifed my datatemplate from this <TextBox Text="{Binding Text}"></TextBox> to this <TextBox Text="{Binding Path=Text}"></TextBox> and then everything worked great. I need some indepth documenation/samples to data/element binding. I don't understand why some examples have the path set whereas others do not. A full explanation of this, and all other nice to know tips would be much appreciated.

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  • Silverlight layout Best Practices

    - by JustSmith
    I'm writing a fairly big interface using Silverlight. As I progress, the xaml file is getting fairly big and is becoming proportionally uglier. Questions Are there any resources out there to make the xaml more readable? For example, how would I display the order of attributes (e.g. height and Width first) so that it looks the most tidy? Another issue is that there are multiple ways to implement an interface with grids and stack panels. Is there a preferred approach when using one or the other? I am looking for advice and links to other resources that can be used as examples.

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  • Reading HttpURLConnection InputStream - manual buffer or BufferedInputStream?

    - by stormin986
    When reading the InputStream of an HttpURLConnection, is there any reason to use one of the following over the other? I've seen both used in examples. Manual Buffer: while ((length = inputStream.read(buffer)) > 0) { os.write(buf, 0, ret); } BufferedInputStream is = http.getInputStream(); bis = new BufferedInputStream(is); ByteArrayBuffer baf = new ByteArrayBuffer(50); int current = 0; while ((current = bis.read()) != -1) { baf.append(current); } EDIT I'm still new to HTTP in general but one consideration that comes to mind is that if I am using a persistent HTTP connection, I can't just read until the input stream is empty right? In that case, wouldn't I need to read the message length and just read the input stream for that length? And similarly, if NOT using a persistent connection, is the code I included 100% good to go in terms of reading the stream properly?

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  • Where can I find free WPF controls and control templates?

    - by Geoffrey Chetwood
    Duplicate: Where can I find free WPF controls and control templates? I am looking for some recommendations on good places to find libraries of controls/templates/styles for WPF. I know about the usual places like Infragistics, but it seems to me that there should be some kind of community effort by now to share nice, clean, well written controls for WPF controls. I am not big on the design side, and it would be nice to fill out my personal libraries with some nice examples from people who are better at design. Any ideas/recommendations?

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  • MUL instruction help

    - by Tanner Babcock
    I've read a few tutorials and examples, but I cannot wrap my head around how the MUL instruction works. I've used ADD and SUB without problems. So apparently this instruction multiplies its operand by the value in a register. What register (eax, ebp, esp, etc.) is multiplied by the first operand? And what register is the result stored in, so I can move it to the stack? Sorry, I'm just learning x86 assembly. When I try to compile this line... mull $9 I get, "Error: suffix or operands invalid for 'mul'". Can anyone help me out? Thanks. EDIT: OK Madhur, I replaced "mull" with "mul" and I'm still getting the same error. Here's the whole source. .globl _main _main: pushl %ebp movl %esp, %ebp subl $8, %esp movl $7, %eax mul $9 movl %eax, (%esp) call _putchar xorl %eax, %eax leave ret

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  • Specifying --host1 as localhost with port 8983 in autobench

    - by mamatha
    I am using autobench for benchmarking in ubuntu 8.10 autobench --single_host --host1 localhost --uri1 /solr/admin --low_rate 20 --high_rate 200 --rate_step 20 --num_call 10 --num_conn 5000 --timeout 5 --file bench1.tsv This is the command which I gave. It is taking the default port as 80 and the number of replies and requests are as shown below **Errors: total 5000 client-timo 0 socket-timo 0 connrefused 5000 connreset 0 Errors: fd-unavail 0 addrunavail 0 ftab-full 0 other 0 Zero replies received, test invalid: rate 20 httperf --timeout=5 --client=0/1 --server=localhost --port=80 --uri=/solr/admin --rate=40 --send-buffer=4096 --recv-buffer=16384 --num-conns=5000 --num-calls=10 Maximum connect burst length: 4 Total: connections 5000 requests 0 replies 0 test-duration 124.976 s** But, I want the port to be 8983. In all the examples that I have seen in the autobench tutorial, --host1 is a website (such as, www.test.com). Can anyone suggest how to use localhost taking the port as 8983? Thanks, in advance.

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  • Performance analysis strategies

    - by Bernd
    I am assigned to a performance-tuning-debugging-troubleshooting task. Scenario: a multi-application environment running on several networked machines using databases. OS is Unix, DB is Oracle. Business logic is implemented across applications using synchronous/asynchronous communication. Applications are multi-user with several hundred call center users at peak time. User interfaces are web-based. Applications are third party, I can get access to developers and source code. I only have the production system and a functional test environment, no load test environment. Problem: bad performance! I need fast results. Management is going crazy. I got symptom examples like these: user interface actions taking minutes to complete. Seaching for a customer usually takes 6 seconds but an immediate subsequent search with same parameters may take 6 minutes. What would be your strategy for finding root causes?

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  • Perl: implementing a dispatch table in an OO module?

    - by Iain
    I want to put some subs that are within an OO package into an array - also within the package - to use as a dispatch table. Something like this package Blah::Blah; use fields 'tests'; sub new { my($class )= @_; my $self = fields::new($class); $self->{'tests'} = [ $self->_sub1 ,$self->_sub2 ]; return $self; } _sub1 { ... }; _sub2 { ... }; I'm not entirely sure on the syntax for this? $self->{'tests'} = [ $self->_sub1 ,$self->_sub2 ]; or $self->{'tests'} = [ \&{$self->_sub1} ,\&{$self->_sub2} ]; or $self->{'tests'} = [ \&{_sub1} ,\&{_sub2} ]; I don't seem to be able to get this to work within an OO package, whereas it's quite straightforward in a procedural fashion, and I haven't found any examples for OO. Any help is much appreciated, Iain

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  • Simple example of popup authentication with Facebook Graph API

    - by ensnare
    Trying to get Facebook to authenticate my users via a javascript popup. Right now, I have: <input type="button" value="Connect with Facebook" onclick="window.open('https://graph.facebook.com/oauth/authorize?client_id=XXXXXXXXXXX&redirect_uri=http://example.com/step2&display=popup')" /> But when the user logs in via Facebook, the popup just displays the Facebook.com homepage. I'd like for the popup to authenticate the user and go away so that I can start retrieving user data from the graph api. Is there a better / easier way to do this? Simple examples are appreciated. Thank you.

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  • PHP Special Characters Test

    - by pws5068
    What's an efficient way of checking if a username contains a number of special characters that I define. Examples: % # ^ . ! @ & ( ) + / " ? ` ~ < { } [ ] | = - ; I need to detect them and return a boolean, not just strip them out. Probably a super easy question but I need a better way of doing this than a huge list of conditionals or a sloppy loop.

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  • Zend currency custom format like "$ 1,234.56 USD"

    - by Jorre
    I'm using the zend currency module to manage currencies in a web app. I can't figure out how to create a custom format for my currencies, since there are no examples on the documentation pages: http://framework.zend.com/manual/en/zend.currency.options.html From what I read there, I could use the format parameter to set a format, but I can't find a way how. Does anyone have a good code example for this problem? currently I do the following: $currency->setFormat(array (display' => Zend_Currency::USE_SYMBOL)); That works to display only the symbol, but I'm also interested in putting an extra space after or before the symbol and to display currencies like this: "$ 1,234.56 USD" "€ 1.234,56 EUR"

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  • How do I display a local html file in a UIWebView?

    - by Thomas
    I have a relatively simple question that I cannot seem to find the answer for. While doing the Google Maps Java API Tutorials, I ran into a problem. I can load an HTML file from the web, but when I try it locally, it just displays the contents of the file instead of running the script. Here's what works: NSString *url = @"http://code.google.com/apis/maps/documentation/v3/examples/geocoding-simple.html"; NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]]; [webView loadRequest:request]; I want to store the HTML file locally and run it from the device itself, so I tried: [webView loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"geocoding-simple" ofType:@"html"]isDirectory:NO]]]; and it just displayed the contents of the file. What am I doing wrong here? Thomas

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  • Parsing complex string using regex

    - by wojtek_z
    My regex skills are not very good and recently a new data element has thrown my parser into a loop Take the following string "+USER=Bob Smith-GROUP=Admin+FUNCTION=Read/FUNCTION=Write" Previously I had the following for my regex : [+\\-/] Which would turn the result into USER=Bob Smith GROUP=Admin FUNCTION=Read FUNCTION=Write FUNCTION=Read But now I have values with dashes in them which is causing bad output New string looks like "+USER=Bob Smith-GROUP=Admin+FUNCTION=Read/FUNCTION=Write/FUNCTION=Read-Write" Which gives me the following result , and breaks the key = value structure. USER=Bob Smith GROUP=Admin FUNCTION=Read FUNCTION=Write FUNCTION=Read Write Can someone help me formulate a valid regex for handling this or point me to some key / value examples. Basically I need to be able to handle + - / signs in order to get combinations.

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  • DataModelSelection on list exposed via EntityQuery

    - by Kalpana
    Is it possible to have support for enabling DataModelSelection on a list page paginated via EntityQuery? (All the examples load the list by performing a query on the @Factory method). But, I would like to re-use the existing pagination mechanism and just enable the ability to support DataModelSelection on it. I am also assuming that DataModelSelection is capable of tracking a single row in a List, how do we extend this to support a certain action (say deletion, activation ...) of multiple rows. I am a newbie and would appreciate any help on this topic. I have already gone through the samples shipped as part of Seam (booking, message). I have already posted this in seam users forum, but I am yet to get a response

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  • connecting Mud.............

    - by jason
    hi, ive recently create a short and simple multi user dungeon, the things ive made is the engine of the game and the actually mud itself so when i click on the file it you can play the mud. the problem ive got is i dont know how to connect it so that more than one player can play. do you connect it to a server or something. i dont know what to do as i am new the python Mud so can some help me out by giving some examples to help me out with code and how to connect and get this game up and running. thanks

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  • Interacting with RESTful API's via Javascript?

    - by Alex
    Hi there, to start off, I know C++, C#, Python, some Ruby, and basic Javascript. Anyway, my question revolves around how to interact with RESTful API's via Javascript. I haven't been able to find any good examples on various websites, and so I've come here. So my basic question is: How do I interact with RESTful API's via JS? And where can I find out how to implement OAuth in JS? I know how to get my keys and such, just not how to actually code them in. Below is an example of a twitter API status update run from my MAC terminal with curl: curl -u username:password -d "my tweet" http://api.twitter.com/1/statuses/update.json How can I implement this in Javascript (preferably with OAuth authentication)? This would at least start me going in the right direction. Thanks so much!!

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  • Whats the difference between Process and ProcessStartInfo in C#?

    - by JimDel
    Whats the difference between Process and ProcessStartInfo? Ive used both to launch external programs but there has to be a reason there are two ways to do it. Here are two examples. Process notePad = new Process(); notePad.StartInfo.FileName = "notepad.exe"; notePad.StartInfo.Arguments = "ProcessStart.cs"; notePad.Start(); and ProcessStartInfo startInfo = new ProcessStartInfo(); startInfo.FileName = "notepad.exe"; startInfo.Arguments = " ProcessStart.cs "; Process.Start(startInfo) Thanks

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  • How to combine mvc2 client side validation with other client side validation?

    - by Andrey
    I have a page using mvc2 with client side validation. The client side validation is provided by Microsoft Ajax mvc validation script. This does very well to validate all fields that are related to the model. I also have fields that are never sent to the server such as the confirm password value, and the accept agreement. For these fields i need pure client side validation. I created the javascript to do this, but am now having a hard time integrating the two validatiosn together. I was hoping that i could do something like add another error to an array, or set the page manually to not valid to make sure that the user cannot submit. Basically follow the same approach that i would with normal asp.net validation. I can't find anything like that. In all examples validators are discussed that are connected to parts of the model. What is my best approach here?

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  • Edit first column of GridView

    - by nCdy
    I've got very dynamic GridView and I need to allow to user to edit first column of it. After he edit first column of grid it must be updated on DataBase. Is there any ways to handle it ? My only idea is to put some changeable element to first cell of each Row so it must be able to set / get my values for each row but can't find yet any examples of it ... Additional info : GridView takes data from Object data source and all columns are dynamic (yes, maybe except first, but I add it in dynamic way) and load complete DataTable...

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  • How to transfer large amount of data using WCF?

    - by JSprang
    We are currently trying to move large amounts of data to a Silverlight 3 client using WCF with PollingDuplex. I have read about the MultiplerMessagesPerPoll in Silverlight 4 and it appears to be quite a bit faster. Are there any examples out there for me to reference (using MultipleMessagesPerPoll)? Or maybe some good references on using Net.TCP? Maybe I should be taking a completely different approach? Any ideas or suggestions would be greatly appreciated. Thanks!

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  • What can I expect as the core stack for Rails 3.0 and what will I need to include now as a plugin

    - by DJTripleThreat
    So Rails and Merb are sort of merging in Rails 3.0? Thats how its been described to me anyway. This means that a lot of what made Rails, Rails will now be moved to plug-ins so that it can be more lightweight. HOwever, what are those plug-ins going to be and as a new Rails developer, what are THE must have - and also more mature - plug-ins that a Rails developer should install? Some good examples I can think of might be will_paginate, ruby_prof or sqlite3-ruby.

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  • ASP.NET MCV 2, re-use of SQL-Connection string

    - by cc0
    Hi, so I'm very very far from an expert on MVC or ASP.NET. I just want to make a few simple Controllers in C# at the moment, so I have the following question; Right now I have the connection string used by the controller, -inside- the controller itself. Which is kind of silly when there are multiple controllers using the same string. I'd like to be able to change the connection string in just one place and have it affect all controllers. Not knowing a lot about asp.net or the 'm' and 'v' part of MVC, what would be the best (and simplest) way of going about accomplishing just this? I'd appreciate any input on this, examples would be great too.

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