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• Need help: jBPM installation issue

  - by Kouky

  This is Ms Kahina, I’m getting started with jBPM & Java EE, I tried to install the jBPM 5.4 version by following all the steps stated in the iBPM user guide as below: 1- I’ve installed Java (JDK 1.7) and ant ( Apache-ant-1.9.4). 2- I’ve set both JAVA_HOME and ANT_HOME environement variables. 3- I’ve downloaded the jBPM 5.4 full installer and run the installation script “ant install.demo” and after that the start script “ant start.demo”. But unfortunately jBPM 5.4 is not working. When running the installation Script I’m getting successful message but with the following warnings : [copy] Warning: Could not find file C:\jbpm-installer\db\task-persistence.xml to copy. [copy] Warning: Could not find file C:\jbpm-installer\db\Taskorm.xml to copy. The start demo was successful. Actually when I try to open any tool provided with the jBPM such us the jBPM-console for example I’m getting the following messages: Address not found or sometimes the http status 404 occurred even if the Welcome page of jBoss AS was opened at http://localhost:8080/. Please need your assistance to sort out this issue in order to move forward in my project as I'm blocked in the installation stage since more than a week now, I don’t know if this is related to the jBoss AS7 or to any other thing that I didn’t find out. Looking forward to hearing from you. Thanks Kahina

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• Fun programming or something else?

  - by gion_13

  I've recently heard about android's isUserAGoat method and I didn't know what to think. At first I laughed my brains out, than I was embarrassed for my lack of professionalism and tried to look into it and see if it makes any normal sense. As it turns out it is a joke (as stated here) and it appears that other languages/apis have these sort of easter eggs implemented in their core. While I personally like them and feel they can be a fresh breath sometimes, I think that they also can be both frustrating and confusing (and you begin to ask yourself : "can users be goats?" or "I get it! "goat" is slang for.... wait.."). My question is are there any other examples of these kind of programming jokes and what are their intends? Should they be considered harmless or not (how do programmers feel about it) ? Do they reach their goal (if any other than to laugh) ? Where do you draw a line between a good joke and a disaster? (what if the method was called isUserStupid?)

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• Making WatiN Wait for JQuery document.Ready() Functions to Complete

  - by Steve Wilkes

  WatiN's DomContainer.WaitForComplete() method pauses test execution until the DOM has finished loading, but if your page has functions registered with JQuery's ready() function, you'll probably want to wait for those to finish executing before testing it. Here's a WatiN extension method which pauses test execution until that happens. JQuery (as far as I can see) doesn't provide an event or other way of being notified of when it's finished running your ready() functions, so you have to get around it another way. Luckily, because ready() executes the functions it's given in the order they're registered, you can simply register another one to add a 'marker' div to the page, and tell WatiN to wait for that div to exist. Here's the code; I added the extension method to Browser rather than DomContainer (Browser derives from DomContainer) because it's the sort of thing you only execute once for each of the pages your test loads, so Browser seemed like a good place to put it. public static void WaitForJQueryDocumentReadyFunctionsToComplete(this Browser browser) { // Don't try this is JQuery isn't defined on the page: if (bool.Parse(browser.Eval("typeof $ == 'function'"))) { const string jqueryCompleteId = "jquery-document-ready-functions-complete"; // Register a ready() function which adds a marker div to the body: browser.Eval( @"$(document).ready(function() { " + "$('body').append('<div id=""" + jqueryCompleteId + @""" />'); " + "});"); // Wait for the marker div to exist or make the test fail: browser.Div(Find.ById(jqueryCompleteId)) .WaitUntilExistsOrFail(10, "JQuery document ready functions did not complete."); } } The code uses the Eval() method to send JavaScript to the browser to be executed; first to check that JQuery actually exists on the page, then to add the new ready() method. WaitUntilExistsOrFail() is another WatiN extension method I've written (I've ended up writing really quite a lot of them) which waits for the element on which it is invoked to exist, and uses Assert.Fail() to fail the test with the given message if it doesn't exist within the specified number of seconds. Here it is: public static void WaitUntilExistsOrFail(this Element element, int timeoutInSeconds, string failureMessage) { try { element.WaitUntilExists(timeoutInSeconds); } catch (WatinTimeoutException) { Assert.Fail(failureMessage); } }

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• What’s ‘default’ for?

  - by Strenium

  Sometimes there's a need to communicate explicitly that value variable is yet to be "initialized" or in other words - we’ve never changed it from its' default value. Perhaps "initialized" is not the right word since a value type will always have some sort of value (even a nullable one) but it's just that - how do we tell? Of course an 'int' would be 0, an 'enum' would the first defined value of a given enum and so on – we sure can make this kind of check "by hand" but eventually it would get a bit messy. There's a more elegant way with a use of little-known functionality of: 'default'Let’s just say we have a simple Enum: Simple Enum namespace xxx.Common.Domain{    public enum SimpleEnum    {        White = 1,         Black = 2,         Red = 3    }}   In case below we set the value of the enum to ‘White’ which happens to be a first and therefore default value for the enum. So the snippet below will set value of the ‘isDefault’ Boolean to ‘true’. 'True' Case SimpleEnum simpleEnum = SimpleEnum.White;bool isDefault; /* btw this one is 'false' by default */ isDefault = simpleEnum == default(SimpleEnum) ? true : false; /* default value 'white' */   Here we set the value to ‘Red’ and ‘default’ will tell us whether or not this the default value for this enum type. In this case: ‘false’. 'False' Case simpleEnum = SimpleEnum.Red; /* change from default */isDefault = simpleEnum == default(SimpleEnum) ? true : false; /* value is not default any longer */ Same 'default' functionality can also be applied to DateTimes, value types and other custom types as well. Sweet ‘n Short. Happy Coding!

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• Can observer pattern be represented by cars and traffic lights?

  - by eeerahul

  I wanted to verify with all of you, if I have a correct Observer Pattern analogy. The scenario is as follows: Consider, at a junction, there is a traffic signal, having red, yellow and green lights respectively. There are vehicles facing the traffic signal post. When it shows red, the vehicles stop, when it shows green, the vehicles move on. In case, it is yellow, the driver must decide whether to go or to stop, depending on whether he/she has crossed the stop line or not. At the same time, there are vehicles that do not care about the signal. They would do as they like. The similarities are that, the Traffic Signal happens to be the subject, notifying its states by glowing the appropriate lights. Those looking at it and following the signal are the ones subscribed to it, and behave according to the state of the subject. Those who do not care about it, are sort-of un-subscribed from the traffic signal. Please tell me, if you think this is a correct analogy or not?

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• What guidelines should be followed when implementing third-party tracking pixels?

  - by Strozykowski

  Background I work on a website that gets a fair amount of traffic, and as such, we have implemented different tracking pixels and techniques across the site for various specific reasons. Because there are many agencies who are sending traffic our way through email campaigns, print ads and SEM, we have agreements with a variety of different outside agencies for tracking these page hits. Consequently, we have tracking pixels which span the entire site, as well as some that are on specific pages only. We have worked to reduce the total number of pixels available on any one page, but occasionally the site is rendered close to unusable when one of these third-party tracking pixels fails to load. This is a huge difficulty on parts of the site where Javascript is needed for functionality built into the page, but is unable to initialize until a 404 is returned on the external tracking pixel. (Sometimes up to 30 seconds later) I have spent some time attempting to research how other firms deal with this sort of instability with third-party components, but have come up a bit short. The plan currently is to implement our own stop-gap method to deal with these external outages, but rather than reinventing the wheel, we wanted to find out how this is dealt with on other sites. Question Is there a good set of guidelines that should be followed when implementing third-party tracking pixels? I would love to see some white papers or other written documents about how other people have dealt with this issue.

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• What and all the areas of a Linux a PHP developer should know about? (Like just commands of it or something advanced)

  - by droidsites

  I've developed a website using PHP but I implemented it on Windows OS and hosted it on Windows server. I just searched the PHP job market to know the on-going technology requirement and to keep my knowledge up-to-date accordingly with the job market. I see more are asking for LAMP stack. I understand the sort of skills required for a developer in PHP and MySQL. But coming to the Linux and Apache what kind of the skills exactly companies expect from a developer? On what should I be focusing in case of Linux, Apache whilst developing my website using these LAMP stack? I am going to develop a new website and want it to be using LAMP. But I want to know what difference it makes? Why LAMP stack got more demand in the job market compared to WAMP ? Edit: Sorry I thought my question is creating confusion ... so I put my question in different words as What and all the areas of a Linux a PHP developer should know about? (Like just commands of it or something advanced) Note: I am Linux newbie

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• Software architecture map to aid cross team communication?

  - by locster

  I work in a company where multiple teams each work on different parts of a software product in a vaguely agile/scrum manner. Mostly the organisation works well but there have been instances where a team may make a change without realising its impact on other teams. Where dependence is known communication has been good, and where dependence is suspected then 'broadcast' emails and informal conversations have also worked well. But there exists a sub-set of tasks that fall between the cracks. Broadcast emails are likely not the solution as they would become too numerous such that the email signal/noise ratio would fall. I'm contemplating a solution that involves a sort of map of the software, which details all of the various parts of the system and loosely tries to place interacting and dependent parts near to each other. Each developer then updates their position on the map (today I'm working on X and Y), and therefore if two or more developers happen to be co-located (or proximate) on the map then we can see this each day and this could form the trigger for further discussion on possible overlap and conflict. Is such a method out there and in use? If so what is it and does it work? Otherwise, do you think such a scheme has merit?

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• How to manage Agile developers working with traditional (serial) business persons?

  - by Riggy

  Good afternoon, My work environment has some problems. Our IT team is trying to be more agile, but we're not really getting buy-in from the business. They attend our daily stand-ups and sprint reviews, and they help with sprint planning, but then they turn around and do 4 months of requirements gathering for a project before moving forward with a (mostly) serial development style. The sprint goals are things like "get XX% closer to release". For the IT team, they've turned the Sprints into a sort of death march. We end a Sprint one day and start a new Sprint the very next day. There's no reflection or changes done between sprints, only during. Having never done any of the agile methodologies before, I haven't had a very pleasant introduction to them. So my questions are: 1) Should there be some time (perhaps a week or so) between sprints to do the reflection/introspection/changes/etc.? Or are back-to-back-to-back sprints the norm? 2) Is there any chance for survival for an agile team with no agile business counter-parts? If not, are there some transitional methodologies or even tips for moving the business towards an iterative if not necessarily agile mindset? 3) Should your entire team be on every sprint? We have almost 20 programmers on a single sprint but working on completely different projects (typically teams of 3-5, sometimes larger). Is it normal to have a single sprint or should we be trying to manage multiple independent sprints? Should we be trying to keep the multiple sprints in concurrent lockstep or should their timetables be allowed to overlap and be flexible? Any thoughts or advice is appreciated. This is my first time coming over from SO for a question, so please let me know if there are better ways to phrase these kinds of questions (faq was rather helpful, but still not sure I'm following it perfectly). Thanks!

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• Combinatorial explosion of interfaces: How many is too many?

  - by mga

  I'm a relative newcomer to OOP, and I'm having a bit of trouble creating good designs when it comes to interfaces. Consider a class A with N public methods. There are a number of other classes, B, C, ..., each of which interacts with A in a different way, that is, accesses some subset (<= N) of A's methods. The maximum degree of encapsulation is achieved by implementing an interface of A for each other class, i.e. AInterfaceForB, AInterfaceForC, etc. However, if B, C, ... etc. also interact with A and with each other, then there will be a combinatorial explosion of interfaces (a maximum of n(n-1), to be precise), and the benefit of encapsulation becomes outweighed by a code-bloat. What is the best practice in this scenario? Is the whole idea of restricting access to a class's public functions in different ways for other different classes just silly altogether? One could imagine a language that explicitly allows for this sort of encapsulation (e.g. instead of declaring a function public, one could specify exactly which classes it is visible to); Since this is not a feature of C++, maybe it's misguided to try to do it through the back door with interaces?

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• Installation questions

  - by user12609425

  I've gotten a couple more questions about the installation process for Ops Center. "Can I install on any SPARC / X86 based platform?" Ops Center can run on Oracle Solaris on either architecture, or on Linux. The Certified Systems Matrix lists the supported OSes, and the Linux and Solaris install guides go into more detail about the hardware and OS requirements. "Can we install it on local zones or LDOMS?" Zones, yes; LDOMS, sort of. You can install the Enterprise Controller in a local zone. There are a few caveats, which are explained in the Preparing a Non-Global Zone section. You can also install a Proxy Controller in an Oracle Solaris 11 zone. Agent Controllers, which are the part of the infrastructure that's installed on managed systems, can be put on zones or LDOMS. "Do we need any dedicated network ports from all agent monitoring systems?"  Yes. The port requirements are covered in the Network Port Requirements and Protocols table, which is in the feature reference guide as well as in the install guides.

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• Fastest approach to 3D animation

  - by HappyFerret

  I'm currently tasked with designing a small HTML5 game. Having done everything by myself so far (3D models, codebase, game design, etc) I'm now at a point where I'm running out of time. I've less than a day to animate and bind everything together. However, that's exactly my problem. I was under the naive impression that everything would be easier if I went with pre-rendered 3D models. However, I didn't consider the most difficult part. Animation. After having spent over an hour trying to figure out messiahStudio, I figured it's time to ask for outside help. Is there any easier solution to 3D animation than 3D rigging? What I'm basically looking for is some sort of tool that allows me to simply grab and move/deform select polygons. It doesn't have to be as life-like and accurate as rigging, just efficient enough. Were the circumstances any different, I might just learn how to rig. But that's sorely out of scope right now. PS:The models were created in Sculptris but are fairly low-poly.

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• Files in /home deleted

  - by long-time user....2006

  In the most specific, unemotional terms: Reinstalled os, using 11.10(1 month after release to skip initial issues that usually crop up). Configured system to my specifications(just ways of organizing config files, etc). Log out Log back in after after an hour or so...to find my home directory obliterated and just a few skeleton files existing. think oh well, try again (this has happened before with an install for reasons I've never been able to pinpoint, usually around install time with some sort of update but its never been a major recurring issue) same thing happens I thought something was awry, so I reinstalled again (another 20 minutes, meh) Set up system, arranged home directory a bit differently thinking maybe I tread on something I shouldn't have. log out, come back --- the same thing. Most of the directories I added were deleted (e.g. .xmonad which links to xmonad.hs in my portable config directory) tl;dr every change I make in my home directory gets deleted. The emotional part: UNACCEPTABLE. I need to configure my system the way I want, not get punched in the face everytime I make a change. I'll willingly fill in details as needed, this was just a start to see if anyone can help, I've found no trace of this issue in a search.

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• Can't remove software - Installed in NULL

  - by ChosSimbaOne

  I've installed software to our administration machine. The problem is that i cannot start the software or uninstall it, as it is not in any directory on the machine. I tried to install it at /pack/CST/... but it is not there and a locate on CST or cst returns nothing. The software is installed from a DVD and not a repository. I've tried to reboot the machine, as i thought i might had something to do with the software being loaded in some sort of tmpfs but that didn't help. I've looked through the entire /etc to check for any relations to the software, but unsuccessfully. I'm out of ideas, to what can cause this problem, anyone got any ideas?? EDIT: I downloaded the iso wich i mounted with: sudo mount -o loop /path/to/iso.iso /path/to/mountpoint sudo /path/to/mountpoint/install.sh Ran the install GUI via an X-session. I choose to install the software in /pack/CST/... but when it exited it said that the software had been installed to /tmp/... There was nothing in tmp, so i decided to reboot the machine and did a full find to see if there was anything left of the software, removed what looked like it could be related. It had placed a script in all the /etc/rs* folder which I removed with: sudo update-rc.d -f scriptname -r I rebooted the machine again, just to be sure. When i run the installer again, it tells me that the software is installed in NULL and i have to remove before installing it. /pack/ is a mountpoint for /q/system/pack What i expected was that the software would be installed in /pack/CST, but it seems to be lock in the system, but I am unable to locate where.

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• I have Ubuntu only and need to install Windows

  - by Terzuz

  I had Windows 8, I installed Ubuntu for a new OS, Then I want to sadly go back to Windows , I have a Windows Vista *.iso but I can't boot from it. When I try to extract the '.iso file and have the contents on my USB so it can boot up , When I restart and click F9 for my Boot Device Options , Only my Hard Drive and CD ROM are there but my "Generic Flash Drive" is not , But when I do not have Windows Vista '.iso on it , It will show up in the list. How can I make a partition of some sort, Provide instructions since I am new at this all , then I need to be able to use the Windows Vista installer and install Windows Vista, I would like Dual-Boot if possible. Info: I have the HP 2000 Laptop (Mine was removed from the Best Buy Website so the closest laptop to the specifications and the design is the link at the bottom) I am running Ubuntu 12.10. I have 4GB of RAM , 220 GB in my Hard Drive left , I have a USB Flash Drive which works sometimes , other times it fails. Note - I tried using GParted in Ubuntu but I had a problem where the main drive with 220 GB Free was locked , I am not sure what to do and can not find the correct forum. http://www.bestbuy.com/site/HP+-+Pavilion+15.6"+Laptop+-+4GB+Memory+-+320GB+Hard+Drive+-+Pewter/5043836.p?id=1218608951204&skuId=5043836

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• Ubuntu 14.04 LTS 64-bit install alongside Windows 7

  - by user289222

  I've tried installing Ubuntu 14.04 LTS alongside my Windows 7 OS, following the exact procedure given by the Ubuntu website and random other tutorials. I've tried with a LiveCD and with a USB stick but I always run into the same problem. When I'm at the screen where I'm allowed to select how I want to install Ubuntu ("alongside", "erase Windows 7", "something else"), the first option says "Install Ubuntu inside Windows 7" instead of "Install Ubuntu alongside Windows 7". From pretty much all tutorials I've seen, the tutorial says that the option should say "alongside". I click "inside" anyway, and Ubuntu doesn't install at all. Instead, my computer just reboots, and goes back to the Try Ubuntu or Install Now screen. This happens regardless of using a LiveCD or a USB stick. I've also tried manually resizing my partitions using "something else". Oddly, I see 4 sda partitions: /dev/sda type size used /dev/sda1 1mb unknown Windows 7 (loader) /dev/sda2 ntsf 208mb unknown Recovery Windows Environment (loader) /dev/sda3 ntsf ~752000mb unknown Recovery Windows Environment (loader) /dev/sda4 ~18000mb unknown I try resizing the largest partition, but some sort of internal error occurs and it doesn't let me resize my partitions. Any ideas on what's going on and how to solve it?

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• Marking Discussions as Answered

  As a contributor to a number of projects on CodePlex I really like the fact that the discussions feature exists but also I need ways to help me sort the discussions threads so I can make sure no-one is getting forgotten about. Seems like a lot of you agreed as the feature request Provide feature to allow Coordinators to mark Discussions threads as 'Answered' is our number 2 voted feature right now with 178 votes.  Today we rolled out the first iteration of “answer” support to discussions. In this first iteration we wanted to keep it simple and lightweight. The original poster of the thread along with project owners, developers or editors can mark any post to the thread as an answer. You can have any number of answers marked in a thread and it’s very quick to mark or unmark a post as an answer.  We deliberately keep the answers in the originally posted order so that you can see them in context with the discussion thread. When viewing discussions the default view is still to see everything, but you can easily filter by “Unanswered”.  You can even save that as a bookmark so as someone interested in the project can quickly jump to the unanswered discussion threads to go help out on. As I mention, we kept this first pass of the answering feature as simple and as lightweight as possible so that we can get some feedback on it. Head on over to the issue tracking this feature if you have any thoughts once you have used it for a bit or feel free to respond in the comments. I already have a couple of things I think we want to do such as a refresh of the look and feel of discussions in general along, make it easier to navigate to posts that are marked an answered and surface posts that you do that were marked as answered in your profile page - but if you have ideas then please let us know.

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• Approach to Authenticate Clients to TCP Server

  - by dab

  I'm writing a Server/Client application where clients will connect to the server. What I want to do, is make sure that the client connecting to the server is actually using my protocol and I can "trust" the data being sent from the client to the server. What I thought about doing is creating a sort of hash on the client's machine that follows a particular algorithm. What I did in a previous version was took their IP address, the client version, and a few other attributes of the client and sent it as a calculated hash to the server, who then took their IP, and the version of the protocol the client claimed to be using, and calculated that number to see if they matched. This works ok until you get clients that connect from within a router environment where their internal IP is different from their external IP. My fix for this was to pass the client's internal IP used to calculate this hash with the authentication protocol. My fear is this approach is not secure enough. Since I'm passing the data used to create the "auth hash". Here's an example of what I'm talking about: Client IP: 192.168.1.10, Version: 2.4.5.2 hash = 2*4*5*1 * (1+9+2) * (1+6+8) * (1) * (1+0) Client Connects to Server client sends: auth hash ip version Server calculates that info, and accepts or denies the hash. Before I go and come up with another algorithm to prove a client can provide data a server (or use this existing algorithm), I was wondering if there are any existing, proven, and secure systems out there for generating a hash that both sides can generate with general knowledge. The server won't know about the client until the very first connection is established. The protocol's intent is to manage a network of clients who will be contributing data to the server periodically. New clients will be added simply by connecting the client to the server and "registering" with the server. So a client connects to the server for the first time, and registers their info (mac address or some other kind of unique computer identifier), then when they connect again, the server will recognize that client as a previous person and associate them with their data in the database.

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• REST API wrapper - class design for 'lite' object responses

  - by sasfrog

  I am writing a class library to serve as a managed .NET wrapper over a REST API. I'm very new to OOP, and this task is an ideal opportunity for me to learn some OOP concepts in a real-life situation that makes sense to me. Some of the key resources/objects that the API returns are returned with different levels of detail depending on whether the request is for a single instance, a list, or part of a "search all resources" response. This is obviously a good design for the REST API itself, so that full objects aren't returned (thus increasing the size of the response and therefore the time taken to respond) unless they're needed. So, to be clear: .../car/1234.json returns the full Car object for 1234, all its properties like colour, make, model, year, engine_size, etc. Let's call this full. .../cars.json returns a list of Car objects, but only with a subset of the properties returned by .../car/1234.json. Let's call this lite. ...search.json returns, among other things, a list of car objects, but with minimal properties (only ID, make and model). Let's call this lite-lite. I want to know what the pros and cons of each of the following possible designs are, and whether there is a better design that I haven't covered: Create a Car class that models the lite-lite properties, and then have each of the more detailed responses inherit and extend this class. Create separate CarFull, CarLite and CarLiteLite classes corresponding to each of the responses. Create a single Car class that contains (nullable?) properties for the full response, and create constructors for each of the responses which populate it to the extent possible (and maybe include a property that returns the response type from which the instance was created). I expect among other things there will be use cases for consumers of the wrapper where they will want to iterate through lists of Cars, regardless of which response type they were created from, such that the three response types can contribute to the same list. Happy to be pointed to good resources on this sort of thing, and/or even told the name of the concept I'm describing so I can better target my research.

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• How to educate business managers on the complexity of adding new features? [duplicate]

  - by Derrick Miller

  This question already has an answer here: How to educate business managers on the complexity of adding new features? [duplicate] 3 answers We maintain a web application for a client who demands that new features be added at a breakneck pace. We've done our best to keep up with their demands, and as a result the code base has grown exponentially. There are now so many modules, subsystems, controllers, class libraries, unit tests, APIs, etc. that it's starting to take more time to work through all of the complexity each time we add a new feature. We've also had to pull additional people in on the project to take over things like QA and staging, so the lead developers can focus on developing. Unfortunately, the client is becoming angry that the cost for each new feature is going up. They seem to expect that we can add new features ad infinitum and the cost of each feature will remain linear. I have repeatedly tried to explain to them that it doesn't work that way - that the code base expands in a fractal manner as all these features are added. I've explained that the best way to keep the cost down is to be judicious about which new features are really needed. But, they either don't understand, or they think I'm bullshitting them. They just sort of roll their eyes and get angry. They're all completely non-technical, and have no idea what does into writing software. Is there a way that I can explain this using business language, that might help them understand better? Are there any visualizations out there, that illustrate the growth of a code base over time? Any other suggestions on dealing with this client?

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• Bayesian content filter for vbulletin [on hold]

  - by mc0e

  I've been tasked with coming up with a tool to automatically flag some posts for moderator attention on a large vbulletin forum. It's not spam per se, but the task has a lot in common with the sort of handling that might be done by a spam protection plugin (a mod in vbulletin speak). There's only so much I can say, but the task does not involve bad users, so much as particular kinds of posts which the moderators need to be aware of. Filtering out user registrations and links is therefore not useful, and we are talking about posts by real human users. What I'm looking for is an existing bayesian classification plugin, or something that I can study to get an understanding of how to do the vbulletin side of the interface in order to build such a thing. Ie I'd need ways for moderators to list flagged posts, and to correct the classification of posts which have been mis-classified. Ideally I want a 3 way split with an "unsure" category in order to reduce what has to be reviewed to find any mis-classifications. Any pointers? I've searched around a bit, and so far what I've found has been more or less entirely targetted at intervening in sign-ups (mostly using stopforumspam), captchas, and use of external services like akismet which are spam specific. I'm also considering an external solution, which might be ableto be interfaced i

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• Artificial Intelligence ... how to make an object roam freely/avoid other objects, and model consciousness? [on hold]

  - by help bonafide pigeons

  Say a simple free roam battle scene in which a player runs around freely and engages in battle with other enemies/objects, as shown below: The dragon/dinosaur (or whatever that thing I drew appears to be) will, by some measure, try and avoid attacks so it is modeled to appear to have a conscious desire to avoid pain. My question is ... since this is very complex, many possible strategies for solving this, algorithms, etc., what is the basic idea behind how this would be accomplished in any sort? Like, we can assume the enemy in the picture is not just going to aimlessly hop around and avoid, but freely be modeled to behave as if it were really exploring/fighting. For the best example I can give, witness the behavior of the enemies in Final Fantasy 12 in this video: http://www.youtube.com/watch?v=mO0TkmhiQ6w How do the pros, or how would anyone attempt solve/implement this? PS: I have tried several times to give an image the "illusion" that is has a conciousness, but aside from emulating a real animal's consciousness in complete, I fall short and get choppy moving images that follow predictable patterns, error-prone movements, and the worst imaginable scenario of a battle engagement.

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• Site experiencing low traffic volume between 8AM and 4PM BST

  - by BizNuge

  There may be no definitive answer to this question but I thought peer review of the problem might stimulate some ideas on the topic. We have a boutique sales site that is experiencing low volumes of traffic (both UK and international) between 8AM and 4PM BST. This seems sort of strange since our target audience for the site is UK based, and this would seem to be when people are awake and online. We are in contact with another boutique site in the same sector who don't experience this issue, so it seems kinda strange. Later on in the day we are getting traffic from the UK, as well as a fair amount of international traffic, so I'm at a loss to figure this one out. The site is fairly well optimised including:- sitemap.xml Proper caching policies across the board google merchant dublin core microdata html5 pretty urls meta and content are reviewed as an ongoing concern we have decent sitelinks for direct queries thru google on the site name a decent amount of inbound links FB, Twitter, Google +1 Google maps listing [verified] site has been selling for ~4 months and is getting ~250 users per day. So I'm not entirely sure how to explain the mid day dip in our figures.... Any ideas at all would be useful. Cheers all!

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• How often do you review fundamentals?

  - by mlnyc

  So I've been out of school for a year and a half now. In school, of course we covered all the fundamentals: OS, databases, programming languages (i.e. syntax, binding rules, exception handling, recursion, etc), and fundamental algorithms. the rest were more in-depth topics on things like NLP, data mining, etc. Now, a year ago if you would have told me to write a quicksort, or reverse a singly-linked list, analyze the time complexity of this 'naive' algorithm vs it's dynamic programming counterpart, etc I would have been able to give you a decent and hopefully satisfying answer. But if you would have asked me more real world questions I might have been stumped (things like how would handle logging for an application, or security difference between GET and POST, differences between SQL Server and Oracle SQL, anything I list on my resume as currently working with [jQuery questions, ColdFusion questions, ...] etc) Now, I feel things are the opposite. I haven't wrote my own sort since graduating, and I don't really have to worry much about theoretical things that do not naturally fall into problems I am trying to solve. For example, I might give you some great SQL solutions using an analytical function that I would have otherwise been stumped on or write a cool web application using angular or something but ask me to write an algo for insertAfter(Element* elem) and I might not be able to do it in a reasonable time frame. I guess my question here to the experienced programmers is how do you balance the need to both learn and experiment with new technologies (fun!), working on personal projects (also fun!) working and solving real world problems in a timeboxed environment (so I might reach out to a library that does what I want rather than re-invent the wheel so that I can focus on the problem I am trying to solve) (work, basically), and refreshing on old theoretical material which is still valid for interviews and such (can be a drag)? Do you review older material (such as famous algorithms, dynamic programming, Big-O analysis, locking implementations) regularly or just when you need it? How much time do you dedicate to both in your 'deliberate practice' and do you have a certain to-do list of topics that you want to work on?

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• Allowing client to select data to return via REST interface

  - by CMP

  I have a rest service that is essentially a proxy to a variety of other services. So if I call GET /users/{id} It will get their user profile, as well as order history, and contact info, etc... all from various services, and aggregates them into one nice object. My problem is that each call to a different service has the potential to add time to the original request, so we would rather not get ALL the data ALL of the time if a particular client does not care about all of the pieces. A solution I have arrived at is to do something like this: GET /users/{id}?includeOrders=true&includeX=true&includeY=true... That works, and it allow me to do only what I need to, but it is cumbersome. We have added enough different data sources that there are too many parameters for that style to be useful. I could do something similar with a single integer and a bitmask or something, but that only makes it harder to read, and it does not feel very Restful. I could break it down into multiple calls so they would need to call /users/{id}/orders and /users/{id}/profile separately, but that sort of defeats the purpose of an aggregating proxy, who's purpose is to make clients jobs easier. Are there any good patterns that can help me return just enough data for each client, without making it too difficult for them to filter and select what they want?

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