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  • Design Better, Rich Internet Applications

    As you know, Rich Internet Applications are web-based software programs that behave and operate like a desktop application. These may be delivered through a site-specific browser, a browser plug-in, or through other methods; they are especially useful for massively-multiplayer online role-playing games (MMORPGs). RIA training can be especially useful in learning the tools that are used for designing and developing these increasingly-necessary additions to Internet Web Sites.

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  • Stairway to Database Design STEP 2: Domains, Constraints and Defaults

    A clear understanding of SQL Data Types and domains is a fundamental requirement for the Database Developer, but it is not elementary. If you select the most appropriate data type, it can sidestep a variety of errors. Furthermore, if you then define the data domains as exactly as possible via constraints, you can catch a variety of those problems that would otherwise bedevil the work of the application programmer.

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  • Thriving With Web Design and Development

    Web Designers and Developers seem to compete for projects, so it seems only natural to find the source of business from the start and hopefully bid and win the job over "the other guy". Other industry specialists such as Domain Investors and other Web Developers already have the projects and established capital, marketing plan, and usually a concept for their project or campaign and you better believe they need your assistance.

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  • XBMC remote control key repeat

    - by Amigable Clark Kant
    Those who have used XBMC with a WiFi remote, such as an Android or iOS device with the official XBMC remotes, have probably seen this at one time or another: your remote stops working, when you press a key, that key is repeated very fast. Sometimes you can break the key repeat loop by pressing that same key again. Sometimes (as this particular morning) you can not. This problem has existed for literally years (it even occurs on the old XBOX only builds) but there seems to be no definite explanation as to what is causing it. I am asking for a workaround. (If you Google, you can find threads were people are ridiculed for bringing up this problem, which is one reason I ask here instead of on the official forums. Also the fact that this problem has persisted for so many years.) I am running, right now, XBMCBuntu Live Eden and the latest official iOS remote. Although, I have seen this problem on all combinations of remotes and XBMC versions I have tried over the years, which are many. (XBMC on Windows, Linux, OSX, remotes on Android and iOS.) Link to bug #136 for the Android remote. It's marked as "fixed" as of client version 636, but the problem is seen again in rev 730. Go figure. There is something fundamentally wrong with how keypresses are sent from the various remotes to XBMC, since this problem is seen across time, XBMC versions and iOS/Android.

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  • Interface design where functions need to be called in a specific sequence

    - by Vorac
    The task is to configure a piece of hardware within the device, according to some input specification. This should be achieved as follows: 1) Collect the configuration information. This can happen at different times and places. For example, module A and module B can both request (at different times) some resources from my module. Those 'resources' are actually what the configuration is. 2) After it is clear that no more requests are going to be realized, a startup command, giving a summary of the requested resources, needs to be sent to the hardware. 3) Only after that, can (and must) detailed configuration of said resources be done. 4) Also, only after 2), can (and must) routing of selected resources to the declared callers be done. A common cause for bugs, even for me, who wrote the thing, is mistaking this order. What naming conventions, designs or mechanisms can I employ to make the interface usable by someone who sees the code for the first time?

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  • How to charge for software design [on hold]

    - by cja
    I have a prospect with both an idea and an existing customer of theirs who want to pay for this idea to be implemented. The customer want to pay only when the implementation is complete. My prospect has separate investors that will fund the implementation. The prospect wants to know how much I will charge for the implementation so that he knows how much to ask the investors for. Before I can estimate reliably I need to work with the prospect to develop an implementation plan. This planning work will take time that I want to charge for. The prospect doesn't have enough money to pay me until the investment. I want to make sure I am paid for the planning. How can I resolve this?

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  • Interface hierarchy design for separate domains

    - by jerzi
    There are businesses and people. People could be liked and businesses could be commented on: class Like class Comment class Person implements iLikeTarget class Business implements iCommentTarget Likes and comments are performed by a user(person) so they are authored: class Like implements iAuthored class Comment implements iAuthored People's like could also be used in their history: class history class Like implements iAuthored, iHistoryTarget Now, a smart developer comes and says each history is attached to a user so history should be authored: interface iHistoryTarget extends iAuthored so it could be removed from class Like: class Person implements iLikeTarget class Business implements iCommentTarget class Like implements iHistoryTarget class Comment implements iAuthored class history interface iHistoryTarget extends iAuthored Here, another smart guy comes with a question: How could I capture the Authored fact in Like and Comment classes? He may knows nothing about history concept in the project. By scalling these kind of functionallities, interfaces may goes to their encapsulated types which cause more type strength, on the other hand explicitness suffered and also code end users will face much pain to process. So here is the question: Should I encapsulate those dependant types to their parent types (interface hierarchies) or not or explicitly repeat each type for every single level of my type system or ...?

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  • khotkey: starts firefox on any key?

    - by Adobe
    I have many scripts which I call with khotkey. However -- in my other laptop -- khotkey wouldn't call the script -- but tries to open the command in firefox. I checked -- the scripts are executable, and are mine. What else could that be? When I start the command from konsole -- it works as expected, but when I call it with khotkey -- it doesn't. I guess someone shadows my keybiding. But who could that be?

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  • Classless tables possible with Datamapper?

    - by barerd
    I have an Item class with the following attributes: itemId,name,weight,volume,price,required_skills,required_items. Since the last two attributes are going to be multivalued, I removed them and create new schemes like: itemID,required_skill (itemID is foreign key, itemID and required_skill is primary key.) Now, I'm confused how to create/use this new table. Here are the options that came to my mind: 1) The relationship between Items and Required_skills is one-to-many, so I may create a RequiredSkill class, which belongs_to Item, which in turn has n RequiredSkills. Then I can do Item.get(1).requiredskills. This sounds most logical to me. 2) Since required_skills may well be thought of as constants (since they resemble rules), I may put them into a hash or gdbm database or another sql table and query from there, which I don't prefer. My question is: is there sth like a modelless table in datamapper, where datamapper is responsible from the creation and integrity of the table and allows me to query it in datamapper way, but does not require a class, like I may do it in sql?

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  • Costs to Design and Manage a Website

    The problem with most "link building" services it that they spam you content across the internet. Also most if not all of the links/ pages are not indexed. If the pages are not indexed or re-indexed then the search engine i.e. Google does not know that the link is there.

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  • SSH with public/private key to iMac fails.

    - by bennedich
    I'm trying to connect to my iMac (server) from my macbook (client) on my LAN. Both have Mac OS X 10.6.4. Server running on a new clean install of the OS. When just activating Remote Login in System Preferences everything works fine. But when setting up ssh to only work with public/private key I get the following error messages from the server log depending on if I use a rsa passphrase or not: With passphrase (case 1): PAM: user account has expired for <myServerUserName> from 192.168.X.X via 192.168.X.Y Without passphrase (case 2): Failed publickey for <myServerUserName> from 192.168.X.X port AAAAA ssh2 This is my setup algorithm: Create a private and public key on client with command ssh-keygen -t rsa. In case 1 I also set a passphrase. Move the id_rsa.pub to the server path /Users/<myServerUserName>/.ssh/ In this folder I execute cat id_rsa.pub > authorized_keys Making sure Remote Login isn't active, I now execute sudo /usr/sbin/sshd -d on the server. Back on the client I now type ssh -v -v -v <myServerUserName>@192.168.X.Y and get prompted to accept RSA key fingerprint. This is NOT the same fingerprint as the one from when I created the private/public key (should it be?). I accept. Depending on case: CASE 1: Client gets halted for password and the response is permission denied even though correct password is given. Back on the server I can read the error message I stated above for case 1: PAM: user account has expired... CASE 2: Client gets message Connection closed by 192.168.X.Y. Back on the server I can read the error message I stated above for case 2: Failed publickey... What could possibly cause this?

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  • Print Screen key doesn't work if a drop-down menu is active

    - by wim
    On 11.10, I don't get a screengrab when pressing the Print Screen button on my keyboard if I have activated a drop down menu. For example, in nautilus, I can click the File menu and press the print screen button, nothing happens. Deactivating the drop down menu and all other things being equal, it works. Is that normal? Often when using this thing I'm actually needing to show some of those menu options. Currently I use the workaround to grab after a delay of a few seconds, but I'm used to the print screen button working no matter what's in focus and would prefer it that way.

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  • Protobuf design patterns

    - by Monster Truck
    I am evaluating Google Protocol Buffers for a Java based service (but am expecting language agnostic patterns). I have two questions: The first is a broad general question: What patterns are we seeing people use? Said patterns being related to class organization (e.g., messages per .proto file, packaging, and distribution) and message definition (e.g., repeated fields vs. repeated encapsulated fields*) etc. There is very little information of this sort on the Google Protobuf Help pages and public blogs while there is a ton of information for established protocols such as XML. I also have specific questions over the following two different patterns: Represent messages in .proto files, package them as a separate jar, and ship it to target consumers of the service --which is basically the default approach I guess. Do the same but also include hand crafted wrappers (not sub-classes!) around each message that implement a contract supporting at least these two methods (T is the wrapper class, V is the message class (using generics but simplified syntax for brevity): public V toProtobufMessage() { V.Builder builder = V.newBuilder(); for (Item item : getItemList()) { builder.addItem(item); } return builder.setAmountPayable(getAmountPayable()). setShippingAddress(getShippingAddress()). build(); } public static T fromProtobufMessage(V message_) { return new T(message_.getShippingAddress(), message_.getItemList(), message_.getAmountPayable()); } One advantage I see with (2) is that I can hide away the complexities introduced by V.newBuilder().addField().build() and add some meaningful methods such as isOpenForTrade() or isAddressInFreeDeliveryZone() etc. in my wrappers. The second advantage I see with (2) is that my clients deal with immutable objects (something I can enforce in the wrapper class). One disadvantage I see with (2) is that I duplicate code and have to sync up my wrapper classes with .proto files. Does anyone have better techniques or further critiques on any of the two approaches? *By encapsulating a repeated field I mean messages such as this one: message ItemList { repeated item = 1; } message CustomerInvoice { required ShippingAddress address = 1; required ItemList = 2; required double amountPayable = 3; } instead of messages such as this one: message CustomerInvoice { required ShippingAddress address = 1; repeated Item item = 2; required double amountPayable = 3; } I like the latter but am happy to hear arguments against it.

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  • Joomla Web Design

    Internet entrepreneurs may find Joomla is an excellent tool for them. This open source software is designed to be a content management system (CMS) which enables even the most novice of website builders to manage all of the content on their websites with ease. This includes all of the text, images, audio, video, quizzes, surveys and other applications available on the website.

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