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• In C++, is it a reflection of poor software design if objects are deleted manually?

  - by grokus

  With the advent of smart pointers, is it a sign of poor design if I see objects are deleted? I'm seeing some software components in our product that people are still doing this. This practice strikes me as un-idiomatic, but I need to be sure this is the industry consensus. I'm not starting a crusade but it'd be nice to be prepared theory wise. Edit: legit uses of delete, Klaim mentioned the object pool use case. I agree. Bad examples of using delete, I am seeing many new's in constructor or start() and corresponding delete's in the destructor or stop(), why not use scoped_ptr? It makes the code cleaner.

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• Can WebGL be used to create a tile-based multi-layer scrolling platform game?

  - by Nicholas Hill

  I've found WebGL (based on OpenGL) to be a fiendish and unforgiving framework for those learning to write HTML5-based games. Despite the presence of many examples on how to get started, I'm really struggling to understand how I could simply load a bunch of images and render them to a canvas quickly using WebGL. My specific scenario involves trying to render a map using a bespoke but simple multi-layered tile engine, where each value in a three dimensional array points to the image to use for that location in the rendered image. Think "Sonic the Hedgehog" via tilesets, tiles, maps, layers, sprites etc. Can anyone enlighten me: 1) How can I load an image that I can use as a texture in WebGL? 2) How can I dynamically select an image at run time and draw it at any co-ordinate, that I also select at run time?

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• How can I allow a user to stream my videos securely?

  - by John Baber

  I've got a script that records 10 minute videos from a webcam to video1.mp4 video2.mp4 video3.mp4 video4.mp4 Then records over video1 again in rotation. I'd like one user to be able to view these in winamp or itunes by having a playlist with the four of them on repeat. (This is my way of getting around the many hours of figuring out how to actually livestream from a webcam with VLC). I don't see any examples of things like icecast being used for video, and I don't see any mentions of secure streaming. My question is, is there any way to have these videos be seen securely? I can do things like https on my server, but I don't have great access to the user's machine, so just sharing a directory by samba or sshfs isn't much of an option.

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• Component based design, but components rely on eatchother

  - by MintyAnt

  I've begun stabbing at a "Component Based" game system. Basically, each entity holds a list of components to update (and render) I inherit the "Component" class and break each game system into it. Examples: RenderComponent - Draws the entity MovementComponent - Moves the entity, deals with velocity and speed checks DamageComponent - Deals with how/if the entity gets damaged... So. My system has this: MovementComponent InputComponent Now maybe my design is off, but the InputComponent should say things like if (w key is down) add y speed to movement if (x key is down) Trigger primary attack This means that the InputComponent sort of relies on these other components. I have to do something alone the lines of: if (w key is down) { MovementComponent* entityMovement = mEntity->GetMovement(); if (entityMovement != NULL) add y speed to movement } which seems kinda crappy every update. Other options? Better design? Is this the best way? Thanks!

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• Is C++11 Uniform Initialization a replacement for the old style syntax?

  - by Robert Dailey

  I understand that C++11's uniform initialization solves some syntactical ambiguity in the language, but in a lot of Bjarne Stroustrup's presentations (particularly those during the GoingNative 2012 talks), his examples primarily use this syntax now whenever he is constructing objects. Is it recommended now to use uniform initialization in all cases? What should the general approach be for this new feature as far as coding style goes and general usage? What are some reasons to not use it? Note that in my mind I'm thinking primarily of object construction as my use case, but if there are other scenarios to consider please let me know.

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• Non persistent keyboard shortcuts in Unity

  - by nblumoe

  I did change the keyboard shortcuts for window navigation in Unity to use hjkl (vim movement). I did reassign the shortcuts via GUI in System Settings Keyboard Shortcuts. Here are two examples of the assigned shortcuts: Move window one workspace to the left = Shift+Ctrl+Alt+H Switch to workspace left = Ctrl+Alt+H Occasionally, when restarting the maching, these shortcuts are being reset to theit default values: Move window one workspace to the left = Shift+Ctrl+Alt+Left Switch to workspace left = Ctrl+Alt+Left How can I make these changes permanent? Can someone help me, narrowing down the problem?

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• SQL Concatenate

  - by Bunch

  Concatenating output from a SELECT statement is a pretty basic thing to do in SQL. The main ways to perform this would be to use either the CONCAT() function, the || operator or the + operator. It really all depends on which version of SQL you are using. The following examples use T-SQL (MS SQL Server 2005) so it uses the + operator but other SQL versions have similar syntax. If you wanted to join two fields together for a full name: SELECT (lname + ', ' + fname) AS Name FROM tblCustomers To add some static text to a value: SELECT (lname + ' - SS') AS Name FROM tblPlayers WHERE PlayerPosition = 6 Or to select some text and an integer together: SELECT (lname + cast(playerNumber as varchar) AS Name FORM tblPlayers Technorati Tags: SQL

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• Android Loading Screen: How do I go about using a stack to load elements, and the option of incrementing the size counter?

  - by tom_mai78101

  I have some problems with figuring out what value I should put in the function: int value_needed_to_figure_out = X; ProgressBar.incrementProgressBy(value_needed_to_figure_out); I've been researching about loading screens and how to use them. Some examples I've seen have implemented Thread.sleep() in a Handler.post(new Runnable()) function. To me, I got most of that concept of using the Handler to update the ProgressBar, while pretending to do some heavy crunching work. So, I kept looking. I have read this thread here: How do I load chunks of data from an assest manager during a loading screen? It said that I can try using a stack it needs to load, and adding a size counter as I add elements to the stack. What does it mean? This is the part where I'm totally stumped. If anyone would provide some hints, I'll gladly appreciate it. Thanks in advance.

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• From the Coalface - 4 - Getting a connection string

  - by TATWORTH

  Creating a connection string by hand is quite difficult, however you create a connection string as follows: 1) Create an empty text file in windows explorer and rename it to X.UDL 2) Double click on it and the datalink provider dialog will appear. 3) Select the provider tab. Find the provider for your data access method and click next. 4) Select your source  5) Test the connection and save it. 6) Open X.UDL with a text editor to see your connections string. You can also look at http://www.connectionstrings.com/ for examples of connection strings.

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• What Scripting Program would you choose to recover deleted and missing files?

  - by Steven Graf

  For a private project I'm looking for a command line tool to scan and recover files. I'm working on Gnome 3 (but I could also change my OS if it helps reaching my goal) and must be able to find and recover files on attached devices with formats such as NTFS, Fat32, MAC OS Extended and ext3. Is there a command line script to cover all of them or do I need to use different programs to reach my goal? can you recommend command line tools for these kind of tasks? is one of you willing and able to show me some examples and teach me further?

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• New to Java Programming - Error help

  - by JJJ

  I am going through a Java book and drafting the examples and have run into the following error when compiling this code. Any help would be appreciated thank you. Error: Main.java:3: class Addition is public, should be declared in a file named Addition.java public class Addition        ^ 1 error Code: import java.io.*; import java.util.Scanner; public class Addition {   public static void main(String[] args) { java.util.Scanner input = new java.util.Scanner(System.in);  int number1; int number2; int sum; System.out.print( "Enter first digit: " ); number1 = input.nextInt(); System.out.print( "Enter second digit:" ); number2 = input.nextInt(); sum = number1 + number2; System.out.printf( "Sum is %d\n, sum" );      } }

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• Why use C++ when C works for large projects equally well?

  - by Karl

  Before I start, please DO NOT make this into a C vs C++ flamewar. This question has nothing to do with which language is better or not. Period. I have read that C++ is said to be fit for large projects. After all, it makes managing code easier. OO and other features, for example the STL. But then why use C++ when C works equally well for large projects? Take the example of the Linux kernel. Or GNOME. Or even Windows I guess, it is written in C right? So why bother at all with the complexity of C++ (templates and all that), when C works well and this is not just a statement, but proper examples have been quoted. If it works for projects of magnitude of the kernel, why is C++ preferred or why is C not used for almost all projects?

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• Google I/O 2010 - GWT + HTML5 can do what?!

  Google I/O 2010 - GWT + HTML5 can do what?! Google I/O 2010 - GWT + HTML5 can do what?! GWT 201 Joel Webber, Ray Cromwell, Stefan Haustein How can you take advantage of new HTML5 features in your GWT applications? In this session, we answer that question in the form of demos -- lots and lots of demos. We'll cover examples of how to use Canvas for advanced graphics, CSS3 features, Web Workers, and more within your GWT applications. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 8 1 ratings Time: 57:59 More in Science & Technology

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• WPF Alphabet (Available for download)

  - by mbcrump

  WPF Alphabet is a application that I created to help my child learn the alphabet. It displays each letter and pronounces it using speech synthesis. It was developed using WPF and c# in about 3 hours (so its kinda rough). I went ahead and uploaded it to codeplex for those in similar situation or just wanting to see a particular WPF feature. I would also recommend Scott Hanselman’s BabySmash!. Specific WPF Features: DispatcherTimer (WPF) SpeechSynthesizer (WPF) URL Navigate (WPF) not PAGE XAML Examples: DockPanel Border TextBlock HyperLink Button's and Events Download full source and binaries here.

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• Caption Competition 4: Fist Full of Captions

  - by Simple-Talk Editorial Team

  Once again we ask: What’s going on here? The best caption wins a $50 Amazon voucher. Computer-y answers for preference, but don’t let a lack of electronics stop you from dazzling us with your bon mots. Some examples to set you on your merry way: “You know what it’s like. Someone turns up to an interview in a long coat, they seem fine, but when they start the job it turns out it was a bunch of penguins.” “When I said we needed cold callers, this wasn’t really what I meant.” “Linux developers seek inspiration for new Logo” “Residents of Antarctica hold press conference to protest about Global Warming.”  You can do better. Make us laugh, win fabulous prizes. Answers in the comments, please.

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• Google I/O 2010 - Analyzing and monetizing your mobile apps

  Google I/O 2010 - Analyzing and monetizing your mobile apps Google I/O 2010 - Analyzing and monetizing your Android & iPhone apps Google APIs, Android 201 Chrix Finne, Jim Kelm In this session you'll learn how you can drive awareness and earn revenue for your app using AdSense for Mobile Apps. We'll also discuss how using Google Analytics can help with your app development by providing insights into where your app users are coming from and how they're engaging with your app. We'll share tips, tricks, and examples of real-world mobile apps that have found success. For all I/O 2010 sessions, please go to code.google.com/events/io/2010/sessions.html From: GoogleDevelopers Views: 5 0 ratings Time: 38:52 More in Science & Technology

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• Why is Prolog associated with Natural Language Processing?

  - by kyphos

  I have recently started learning about NLP with python, and NLP seems to be based mostly on statistics/machine-learning. What does a logic programming language bring to the table with respect to NLP? Is the declarative nature of prolog used to define grammars? Is it used to define associations between words? That is, somehow mine logical relationships between words (this I imagine would be pretty hard to do)? Any examples of what prolog uniquely brings to NLP would be highly appreciated.

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• Just Finished My Presentation at SLO! (Central Coast Code Camp At Cal Poly)

  I love code camps!  This is my first time to San Luis Obispos Central Coast Code Camp and Im really enjoying it.  It started last night with the presenters dinner at a great local steak... This site is a resource for asp.net web programming. It has examples by Peter Kellner of techniques for high performance programming...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Webcast on Monday, July 22 - Discover the Key to Profitable Order Fulfillment

  - by Pam Petropoulos

  When it comes to order fulfillment, organizations are challenged by the increasing complexity of global supply chains and an explosion of order and delivery channels. Attend this webcast on Monday, July 22 and hear Steve Banker, Service Director for Supply Chain Management at ARC Advisory Group, discuss how distributed order management solutions can help companies transform their fulfillment operations to gain greater supply chain visibility, improve order profitability, and increase customer service levels and satisfaction.  Hear too from Oracle executives who will showcase examples of customers successfully using Oracle Distributed Order Orchestration. Date: Monday, July 22, 2013 Time:  1:00 p.m. EST Click here to Register Download a free copy of the ARC Advisory Research Brief on Oracle’s Distributed Order Orchestration solution and discover how Boeing, the world’s leading aerospace company, is leveraging the solution to automate their proposal and order management processes and achieve an expected 30% reduction in order cycle times. 

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• A Great Idea I Never Had. Better Elevator Automation, no Buttons in Elevator.

  After my second year at engineering school (Cornell University), I spent the summer working in a dream job as an intern at the world famous Ford Design Center in Dearborn Michigan.  The group I... This site is a resource for asp.net web programming. It has examples by Peter Kellner of techniques for high performance programming...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• How are hybrid VB6/.Net applications functioning in the Real World?

  - by Dabblernl

  I am maintaining a VB6 application and we are studying how to migrate to .Net We are considering doing this gradually by implementing new features in COM visible .Net classes and migrating existing functionality slowly. I found some instructive 'Hello World' examples about how to do this and it works fine with our App. But how is the real world behaviour of these hybrid applications? Are they stable, maintainable? Particular of our program is that more users on the same computer will use it by switching user accounts. EDIT: The VB6 app reads data from a USB connection and stores it in an Access database. The user can call up various views on the data. The data is cached in a hardware device, so interuptions in the reading of it are not fatal.

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• Today's $10 Deal from APress - Next-Generation Business Intelligence Software with Silverlight 3

  - by TATWORTH

  Today's $10 deal from Apress is " Next-Generation Business Intelligence Software with Silverlight 3 Business intelligence (BI) software is the code and tools that allow you to view different components of a business using a single visual platform, making comprehending mountains of data easier. BI is everywhere. Applications that include reports, analytics, statistics, and historical and predictive modeling are all examples of BI applications. Currently, we are in the second generation of BI software, called BI 2.0. This generation is focused on writing BI software that is predictive, adaptive, simple, and interactive. Next-Generation Business Intelligence Software with Rich Internet Applications brings you up to speed with the latest BI concepts."

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• Semi-transparent parts of theme show as full white

  - by Kilian

  I am running ubuntu 10.04 64bit on a macbook pro, using the nvidia-drivers version 260.19.29. As of a recent kernel update, all the semi-transparent parts of my theme show as full white. This means: no gradients on scrollbars and buttons, 'inverted' dividers in context menu's, full white gnome-do panel etc. Does anyone know what causes this and how I can fix it? Screenshot examples below. Scrollbars: Gnome-do: 'inverted' dividers in the context menu: (Last two links are not links due to not having sufficient points)

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• Where do the responsibilities of build tools end and those of CI tools start?

  - by BrandonV

  In the delivery of software, and within the sense of the deployment pipeline, where do the responsibilities of build tools, like Maven, end, and the responsibilities of CI start? As a rough example of a problem that arises; should build tools have any responsibility to the configuration and execution of acceptance tests when they are further down the pipeline than actually building the artifact? I'd like an answer that addresses in the sense of deployment lifecycle phases rather than in specifics, like my example. Although examples would help bolster the answer.

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• Apress Books - 4 - Introducing Visual C# 2010 - Further comments

  - by TATWORTH

  Apress Books Introducing Visual C# 2010 - ISBN 978-1-4302-3171-4 Having read through parts 1 and 2 of this 4 -part book, I am very impressed by its practical approach to C#. I cannot improve on the by-line "Get started on your C# journey with an expert by your side leading by example" Adam Freeman teaches C# by precept and example. I suspect he drives a Volvo C30 as it comes up in many of the code examples!  Throughout the book there are numerous links back and forth so as to avoid overcomplicating the current topic. I have have no hesitation in recommending this book both to programmers starting out with C# and to the seasoned professional. It is a book that should be on every C# development team's book shelf. There are a few typographical errors in the book, one of which has already made it to the errata, however these are very minor and do not detract from the usefulness of this book.

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