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  • C++: How to design a utility class?

    - by Martijn Courteaux
    Hi, The title says it all. But I don't know if I should go for static methods, just a header, a class, or something else? What would be best practice? But, I don't want to have an instance of a utility class. I want to add functions like: Uint32 MapRGB (int r, int g, int b); const char* CopyString(const char* char); // etc. You know: utility methods...

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  • Database Design Question

    - by Soo
    Ok SO, I have a user table and want to define groups of users together. The best solution I have for this is to create three database tables as follows: UserTable user_id user_name UserGroupLink group_id member_id GroupInfo group_id group_name This method keeps the member and group information separate. This is just my way of thinking. Is there a better way to do this? Also, what is a good naming convention for tables that link two other tables?

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  • Why represent shopping carts and order invoices differently in a domain model?

    - by Todd
    I've built some shopping cart systems in the past, but I always designed them such that the final order invoice is just a shopping cart that has been marked as "purchased". All the logic for adding/removing/changing items in a cart is also the logic for the order. All data is stored in the same tables in the database. But it seems this is not the proper way to design an e-commerce site.. Can someone explain the benefit of separating the shopping cart from invoices in the domain model? It seems to me this would lead to a lot of duplicated code, an extra set of tables in the database, and make it harder to maintain in the event the system need to start accommodating more complicated orders (like specifying selected options for an item which may or may not change the price/availability/shipping time of the order). I'm assuming I just haven't seen the light, as every book and other example I see seems to separate these two seemingly similar concerns -- but I can't find any explanation as to the benefit of doing such! It's also the case in the systems that I design that changes are often made after the initial order is confirmed. It's not uncommon for items to be removed, replaced, or added afterwards (but prior to fulfillment).

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  • How should I handle expected errors? eg. "username already exists"

    - by Pheter
    I am struggling to understand how I should design the error handling parts of my code. I recently asked a similar question about how I should go about returning server error codes to the user, eg. 404 errors. I learnt that I should handle the error from within the current part of the application; seem's simple enough. However, what should I do when I can't handle the error from the current link in the chain? For example, I may have a class that is used to manage authentication. One of it's methods could be createUser($username, $password). Within that function, I need to determine if the username already exists. If this is true, how should I alert the calling code about this? Returning null instead of a user object is one way. But how do I then know what caused the error? How should I handle errors in such a way that calling code can easily find out what caused the error? Is there a design pattern commonly used for this kind of situation?

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  • What's the "correct way" to organize this project?

    - by user571747
    I'm working on a project that allows multiple users to submit large data files and perform operations on them. The "backend" which performs these operations is written in Perl while the "frontend" uses PHP to load HTML template files and determines which content to deliver. Data is stored in a database (MySQL, SQLite, Oracle) and while there is data which has not yet been acted upon, Perl adds it to a running queue which delivers data to other threads based on system load. In addition, there may be pre- and post-processing of the data before and after the main Perl script operates (the specifications are unclear) so I may want to allow these processors to be user-selectable plugins. I had been writing this project in a more procedural fashion but I am quickly realizing the benefit of separating concerns as to limit the scope one change has on the rest of the project. I'm quite unexperienced with design patterns and am curious what the best way to proceed is. I've heard MVC thrown around quite a bit but I am unsure of how to apply it. Specifically, what are some good options to structure this code (in terms of design patterns and folder hierarchy)? How can I achieve this with both PHP and Perl while minimizing duplicated code between languages? Should I keep my PHP files in the top level so I don't have ugly paths in the URL? Also, if I want to provide interchangeable databases, does each table need its own DAO implementation?

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  • Patterns and Libraries for working with raw UI values.

    - by ProfK
    By raw values, I mean the application level values provided by UI controls, such as the Text property on a TextBox. Too often I find myself writing code to check and parse such values before they get used as a business level value, e.g. PaymentTermsNumDays. I've mitigated a lot of the spade work with rough and ready extension methods like String.ToNullableInt, but we all know that just isn't right. We can't put the whole world on String's shoulders. Do I look at tasking my UI to provide business values, using a ruleset pushed out from the server app, or open my business objects up a bit to do the required sanitising etc. as they required? Neither of these approaches sits quite right with me; the first seems closer to ideal, but quite a bit of work, while the latter doesn't show much respect to the business objects' single responsibility. The responsibilities of the UI are a closer match. Between these extremes, I could also just implement another DTO layer, an IoC container with sanitising and parsing services, derive enhanced UI controls, or stick to copy and paste inline drudgery.

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  • Google I/O 2010 - Google Wave API design principles

    Google I/O 2010 - Google Wave API design principles Google I/O 2010 - Google Wave API design principles + anatomy of a great extension Wave 201 Pamela Fox, Michael Goderbauer (Hasso Plattner Institute) Google Wave is all about collaboration. The most successful extensions are user-friendly and collaborative. Wave robots should be as intuitive to communicate with as a human, and play well with other robots; Wave gadgets should extend the metaphors of the textual collaboration into the visual. In this talk, we'll discuss the design and privacy principles you should consider while building extensions, and show examples of extensions that demonstrate these principles. For all I/O 2010 sessions, please go to code.google.com/events/io/2010/sessions.html From: GoogleDevelopers Views: 6 0 ratings Time: 01:01:54 More in Science & Technology

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  • Fluid VS Responsive Website Development Questions

    - by Aditya P
    As I understand these form the basis for targeting a wide array of devices based on the browser size, given it would be a time consuming to generate different layouts targeting different/specific devices and their resolutions. Questions: Firstly right to the jargon, is there any actual difference between the two or do they mean the same? Is it safe to classify the current development mainly a html5/css3 based one? What popular frameworks are available to easily implement this? What testing methods used in this regard? What are the most common compatibility issues in terms of different browser types? I understand there are methods like this http://css-tricks.com/resolution-specific-stylesheets/ which does this come under?. Are there any external browser detection methods besides the API calls specific to the browser that are employed in this regard? Points of interest [Prior Research before asking these questions] Why shouldn't "responsive" web design be a consideration? Responsive Web Design Tips, Best Practices and Dynamic Image Scaling Techniques A recent list of tutorials 30 Responsive Web Design and Development Tutorials by Eric Shafer on May 14, 2012 Update Ive been reading that the basic point of designing content for different layouts to facilitate a responsive web design is to present the most relevant information. now obviously between the smallest screen width and the highest we are missing out on design elements. I gather from here http://flashsolver.com/2012/03/24/5-top-commercial-responsive-web-designs/ The top of the line design layouts (widths) are desktop layout (980px) tablet layout (768px) smartphone layout – landscape (480px) smartphone layout – portrait (320px) Also we have a popular responsive website testing site http://resizemybrowser.com/ which lists different screen resolutions. I've also come across this while trying to find out the optimal highest layout size to account for http://stackoverflow.com/questions/10538599/default-web-page-width-1024px-or-980px which brings to light seemingly that 1366x768 is a popular web resolution. Is it safe to assume that just accounting for proper scaling from width 980px onwards to the maximum size would be sufficient to accommodate this? given we aren't presenting any new information for the new size. Does it make sense to have additional information ( which conflicts with purpose of responsive web design) to utilize the top size and beyond?

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  • Procedural terrains in 3D: what has been done ? Are there common algo and/or theories about it ?

    - by jokoon
    Besides programming, modeling an environment takes a great deal of time. I don't know about the work time involved, for example, in a WoW dungeon level, or other beautiful city-like, future environment, jungles, fantasy, etc, but this kind of work is made from scratch by artists. What are the techniques involved in the TorchLight level randomizer, and does other titles have similarities with this ? Is there a family name for such techniques ?

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  • Component-based design: handling objects interaction

    - by Milo
    I'm not sure how exactly objects do things to other objects in a component based design. Say I have an Obj class. I do: Obj obj; obj.add(new Position()); obj.add(new Physics()); How could I then have another object not only move the ball but have those physics applied. I'm not looking for implementation details but rather abstractly how objects communicate. In an entity based design, you might just have: obj1.emitForceOn(obj2,5.0,0.0,0.0); Any article or explanation to get a better grasp on a component driven design and how to do basic things would be really helpful.

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  • Question about component based design: handling objects interaction

    - by Milo
    I'm not sure how exactly objects do things to other objects in a component based design. Say I have an Obj class. I do: Obj obj; obj.add(new Position()); obj.add(new Physics()); How could I then have another object not only move the ball but have those physics applied. I'm not looking for implementation details but rather abstractly how objects communicate. In an entity based design, you might just have: obj1.emitForceOn(obj2,5.0,0.0,0.0); Any article or explanation to get a better grasp on a component driven design and how to do basic things would be really helpful.

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  • Google I/O 2012 - Advanced Design for Engineers

    Google I/O 2012 - Advanced Design for Engineers Alex Faaborg, Christian Robertson Design isn't black magic, it's a field that people can learn. In this talk two elite designers from Google will give you an advanced crash course in interactive and visual design. Topics will include mental models, natural mappings, metaphors, mode errors, visual hierarchies, typography and gestalt principles. Correctly applied this knowledge can drastically improve the quality of your work. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 158 9 ratings Time: 55:50 More in Science & Technology

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  • Windows Phone 7 Design Template

    Windows Phone 7 Design Template Expression Blend is a wonderful design environment for WP7 (Windows Phone 7) but for quickly visualizing a concept nothing beats Illustrator! I am excited about WP7 and decided that having a solid .ai template would prove invaluable. Some of the details of the WP7 UI Design and Interaction Guide are a bit fuzzy (literally) but I was able to generate some useful layout guides, character styles, and symbols. While the template does not cover every aspect of the guide I think it is a good launching point; if you find it useful and extend it please share your updates (I created the template in CS4, if you have problems in earlier versions let me know).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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  • Google I/O 2012 - Android Design for Success

    Google I/O 2012 - Android Design for Success Rachel Garb, Jens Nagel, Nate Streu, Matias Duarte You have a great idea for an Android app. You want it to stand out among hundreds of thousands. You want your users to love it and tell everyone they know. The Android User Experience team is here to help. We'll talk about the Android Design guide and other tricks of the trade for creating apps that delight users and help them accomplish their goals. No design background is required. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 46 5 ratings Time: 01:03:04 More in Science & Technology

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  • Is PPC effective marketing Web Design & Development Services

    - by Pennf0lio
    Have anyone tried to do a PPC campaign on services like, Web Design Web Development Graphic Design Logo Design Programming as an individual and not a company? I've seen companies advertise web services, one popular i've seen is PSD2HTML. But I was if it is also applicable to individuals trying to market it self. If its applicable to, can you give some example how it is being maximize. Thank You! edit: I'd like to know if PPC campaign is effective on services mentioned above as an individual and not a company.

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  • AdventueWorks Design Patterns Project - Part 1

    - by RonGarlit
    This is the presentation I did tonight at PHILLYNJ.NET.  It is the first in a multi-part of a series on the Applied Design Patterns.   The solution files are working code with design pattern notes in the comment blocks. After the overview and higher level discussions on Enterprise Design Patterns I reviewed the low level Database Access Library of code.  With walk-throughs of the the code and unint test. After that we went through the ProductPhotoConsoleTest Application that performed intergration testing of the DBAccess Class with the AdventureWorks ProductPhoto table extracting the photos and writing them to a file folder. The Demo code and PowerPoint can be obained from this link.  https://skydrive.live.com/?wa=wsignin1.0&cid=29e34e9a8650bb9e#!/?cid=29e34e9a8650bb9e&sc=documents&id=29E34E9A8650BB9E%21151 Please note that I use Visual Studio 2010 Ultimate.  If you have a lesser version the Modeling projects likely will not work or have limited functionality and you should unload that project to prevent warning. Enjoy! --Ron

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  • software attribution / design credits

    - by Smith
    We just completed developing a web app for a client. And like i usually do, i added developed by "My Company" at the footer at a very small insignificat size. I sent the client an Eend user license stating some of the following in summary you can't resell, redistribute, etc without our notice ... you can remove the attribution or design credits the client got back to me and complained, telling me now that he was also developing for someone, and that 'I can't add my attribution' without his/her consent, but? Although i sign a NDA with in summary states that i cannot disclose the software to anyone else There was no agreement before the project that am not to add design credits or attribution i know every software i install have that, and so is every products from companies, mostly technological products. how does this work (adding design credits) What do you think?

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  • Oracle Endeca User Interface Design Pattern Library Available

    - by ultan o'broin
    Yes! The Oracle Endeca User Interface Design Pattern Library is now available for all fans of great UI design solutions for search, discovery, and navigation! The patterns explain and show some great UI realizations and include consumer world examples we can relate to. Thanks to the Oracle Endeca team and Applications UX who worked closely together to bring this great user experience resource back out to customers and partners who want to build cutting edge apps, sites, and integrations. Some great insights into how these UI design patterns can bring magical information discovery and more to users, as well as what makes Endeca people tick, are available from the Usable Apps blog Oracle Endeca User Experience: From Putting the E in E-Commerce to Magical Information Discovery.

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  • XSLT: moving a grouping html elements into section levels

    - by Jeff
    Hello there, I'm trying to write an XSLT that organizes an HTML file into different section levels depending on the header level. Here is my input: <html> <head> <title></title> </head> <body> <h1>HEADER 1 CONTENT</h1> <p>Level 1 para</p> <p>Level 1 para</p> <p>Level 1 para</p> <p>Level 1 para</p> <h2>Header 2 CONTENT</h2> <p>Level 2 para</p> <p>Level 2 para</p> <p>Level 2 para</p> <p>Level 2 para</p> </body> </html> I'm working with a fairly simple structure at the moment so this pattern will be constant for the time-being. I need an output like this... <document> <section level="1"> <header1>Header 1 CONTENT</header1> <p>Level 1 para</p> <p>Level 1 para</p> <p>Level 1 para</p> <p>Level 1 para</p> <section level="2"> <header2>Header 2 CONTENT</header2> <p>Level 2 para</p> <p>Level 2 para</p> <p>Level 2 para</p> <p>Level 2 para</p> </section> </section> </document> I had been working with this example: Stackoverflow Answer However, I cannot get it to do exactly what I need. I'm using Saxon 9 to run the xslt within Oxygen for dev. I'll be using a cmd/bat file in production. Still Saxon 9. I'd like to handle up to 4 nested section levels if possible. Any help is much appreciated! I need to append onto this as I've encountered another stipulation. I probably should have thought of this before. I'm encountering the following code sample <html> <head> <title></title> </head> <body> <p>Level 1 para</p> <p>Level 1 para</p> <p>Level 1 para</p> <p>Level 1 para</p> <h1>Header 2 CONTENT</h1> <p>Level 2 para</p> <p>Level 2 para</p> <p>Level 2 para</p> <p>Level 2 para</p> </body> </html> As you can see, the <p> is a child of <body> while in my first snippet, <p> was always a child of a header level. My desired result is the same as above except that when I encounter <p> as a child of <body>, it should be wrapped in <section level="1">. <document> <section level="1"> <p>Level 1 para</p> <p>Level 1 para</p> <p>Level 1 para</p> <p>Level 1 para</p> </section> <section level="1"> <header1>Header 2 CONTENT</header1> <p>Level 2 para</p> <p>Level 2 para</p> <p>Level 2 para</p> <p>Level 2 para</p> </section> </document>

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  • Any home design software similar to The Sims 3?

    - by Level1Coder
    I tried Sketchup to sketch a home design but I find the controls a bit frustrating. I can sketch 10 times faster in The Sims 3, plus it is nicer to look at. Though the metric system may not be 1:1 ratio to reality but it's close, maybe 15%-20% off but this is a just a sketch, right? Anyway, is there any software that does home design like The Sims 3? The same ease of use but at a more professional level and a real metric system?

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  • Software for "High-level" source code (C++) Management

    - by Korchkidu
    after a lot of small-medium projects, I have a lot of libraries and test programs here and there. Also, I must admit that some of the "best practices" I learnt are not that "good" IMHO. In particular, documenting your code and making a "high-level" documentation is not useful in practice: High-level documentation are not maintain up to date = I prefer to read the source code directly; Browsing generated developer documentation is a pain (IMHO) = I prefer to read the source code directly. For that reason, I am looking for a tool who could help me organize all my source code directories in a more "readable manner". What I need is a tool which: Maintains an UML diagram from C++ source code. I don't need source code generation from UML; USE CASE: I am in this super-tool, I notice a design issue, I change the source code, when I get back, the UML diagram is updated; Maintains easily browsable call graphs; Lists references to methods, variables, etc. For example, when I want to see where/when a method is called; Helps writing pseudo-code from C++; Embeds a nice C++ source code browser; Is Open Source would be great; Works at least on Win7. The focus of this tool should be to browse source code to understand what's going on. For example, when you have a newcomer and you need him to go through source code. Do you know any great tool? Thanks in advance. PS: please do not answer doxygen (great tool however).

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  • SQL SERVER – Fix: Error: Compatibility Level Drop Down is Empty

    - by Pinal Dave
    I currently have SQL Server 2012 and SQL Server 2014 both installed on the same machine. My job requires me to travel a lot and I like to travel light. Hence, I have only one computer with all the software installed in it. I can install Virtual Machines but as I was able to install SQL Server 2012 and SQL Server 2014 side by side, I just went ahead with that option. Now one day when I opened up my SQL Server 2014 and went to the properties of the my database, I realized that the dropdown box for Compatibility level is empty. I just can’t select anything there or see what is the current Compatibility level of the database. This was the first time for me so I was bit confused and I tried to search online. Upon searching online I realize that if I was not the first, there are very few questions on this subject on various forums as well as there is no convincing answer to this problem online. That means, I was pretty much first one to face this error. See the image of the situation I was facing. Now I decided to resolve this issue as soon as I can. I spent a few minutes here and there and realize my mistake. I had connected to SQL Server 2014 instance from SQL Server 2012 Management Studio. Hence, I was not able to see any compatibility related settings. Once I connected to SQL Server 2014 instance with SQL Server 2014 Management Studio – this issue was resolved. Well, simple things sometimes keep us very busy. Reference: Pinal Dave (http://blog.sqlauthority.com)Filed under: PostADay, SQL, SQL Authority, SQL Error Messages, SQL Query, SQL Server, SQL Tips and Tricks, T SQL

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  • June 22-24, 2010 in London City Level 400 SQL Server Performance Monitoring & Tuning Workshop

    - by sqlworkshops
    We are organizing the “3 Day Level 400 SQL Server Performance Monitoring & Tuning Workshop” for the 1st time in London City during June 22-24, 2010.Agenda is located @ www.sqlworkshops.com/workshops & you can register @ www.sqlworkshops.com/ruk. Charges: £ 1800 (5% discount for those who register before 21st May, £ 1710).In this 3 Day Level 400 hands-on workshop, unlike short SQLBits sessions, we go deeper on the tuning topics. Not sure if this will be a good use of your time & money? Watch our webcasts @ www.sqlworkshops.com/webcasts.We are trying to balance these commercial offerings with our free community contributions. Financially: These workshops are essential for us to stay in business!Feedback from Finland workshop posted by Jukka, Wärtsilä Oyj on February 23, 2010 to the LinkedIn SQL Server User Group Finland (more feedbacks @ www.sqlworkshops.com/feedbacks):Just want to start this thread and give some feedback on the Workshop that I attended last week at Microsoft.Three days in a row, deep dive into the query optimization and performance monitoring :-) I must say, that the SQL guru Ramesh has all the tricks up in his sleeves.The workshop was very helpful and what's most important: no slide show marathon: samples after samples explained very clearly and with our own class room SQL servers we can try the same stuff while Ramesh typed his own samples.If the workshop will be rearranged, I can most willingly recommend it to anyone who wants to know what's "under the hood" of SQL Server 2008.Once again, thank you Microsoft and Ramesh to make this happen. May the force be with us all :-)Hope to see you @ the Workshop. Feel free to pass on this information to your SQL Server colleagues.-ramesh-www.sqlbits.com/speakers/r_meyyappan/default.aspx

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  • Merging multiple top-level domains into a single domain

    - by user23089
    My client had multiple top-level-domains. Each one represented an insurance program within a specific vertical. For all the sites at these alternate domains, there was a 30/70 mix of duplicate vs. original content. Some of the alternate domains ranked very well for their target keyphrase groups, where others were absent in results pages. We advised the client to merge multiple domains into their existing main domain, for usability and SEO reasons. We recently ran the merger. Here was our process: On the main domain, transfer the content such that it matches 1-for-1 content on the various alternate domains Setup Google Webmaster Tools on the main domain Push the new content on the main domain live and submit a corresponding sitemap to Google Establish 301 redirects on the alternate domains, such that each alternate domain URL points to its respective page on the main domain We did this 12 days ago, and pages (previously on the alternate domains) that had ranked well on Google have now plummeted or are entirely non-existent. Did we do the right thing by merging multiple top-level domains into a single domain? Is this initial dip in rankings normal? How soon should we expect to see it return to its normal rankings?

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  • Advanced Level Troubleshooting for Oracle Process Manufacturing Financials

    - by Annemarie Provisero
    ADVISOR WEBCAST: Advanced Level Troubleshooting for Oracle Process Manufacturing Financials PRODUCT FAMILY: Oracle Process Manufacturing     February 16, 2011 at 8 am PT, 9 am MT, 11 am ET This one-hour session provides basic to advanced level troubleshooting information for Functional Users, System Administrators, DBAs and Customers. TOPICS WILL INCLUDE: Find Log File and Error messages for important processes in OPM Financials. Important SQL queries and filtering transaction related issues. Enabling Debug mode in OPM Financials and SLA. A short, live demonstration (only if applicable) and question and answer period will be included. Oracle Advisor Webcasts are dedicated to building your awareness around our products and services. This session does not replace offerings from Oracle Global Support Services. Click here to register for this session ------------------------------------------------------------------------------------------------------------- The above webcast is a service of the E-Business Suite Communities in My Oracle Support.For more information on other webcasts, please reference the Oracle Advisor Webcast Schedule.Click here to visit the E-Business Communities in My Oracle Support Note that all links require access to My Oracle Support.

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