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  • How do you avoid name similarities between your classes and the native ones?

    - by Oscar
    I just ran into an "interesting problem", which I would like your opinion about: I am developing a system and for many reasons (meaning: abstraction, technology independence, etc) we create our own types for exchanging information. For instance: if there is a method which is called SendEmail and is invoked by the business logic, it way have a parameter of type OurCompany.EMailMessage, which is an object which is completely technology independent and contains only "business relevant data" (for instance, no information abut head encoding). Inside the SendEmail function, we get this information from our EMailMEssage object and create a MailMessage (this one is technolgy specific) object so it can be sent over the network. As you can already notice, our class has a very similar name to the "native" language class. The problem is: this is exactly what they are, email messages, so it is hard to find another meaningful name for them. Do you have this problem often? How do you manage it? Edit: @mgkrebbs just commented about using fully qualified names. This is our current approach, but a little bit too verbose, IMHO. I would like something cleaner, if possible.

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  • How much overhead is there in persistent connections?

    - by nynex
    Ok so I'm musing over a little side project I want to start. Essentially its a multi-session web based FTP client. Multi-session in that you can log into several FTP servers at the same time and perform operations like moving a file from one FTP server to another. I'm doing this mainly to brush up on the new webdev technologies, particularly websockets. I'm using node.js + socket.io to keep a persistent bi-directional connection between the web browser and the web server. The web server will also have persistent connections to each FTP server the user has logged into. So if there are 100 concurrent users each logged into 5 ftp accounts, the web server will have 100 websocket connections + 500 ftp connections. Is servicing 600 connections a lot? I know it depends on the hardware resources of the server but is something like this doable on a budget? Are there more efficient means of doing something like this? I know its unlikely that this project will really get popular but I want it to scale well regardless. Thanks for any help, I've still got a lot to learn.

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  • What technical details should a programmer of a web application consider before making the site public?

    - by Joel Coehoorn
    What things should a programmer implementing the technical details of a web application consider before making the site public? If Jeff Atwood can forget about HttpOnly cookies, sitemaps, and cross-site request forgeries all in the same site, what important thing could I be forgetting as well? I'm thinking about this from a web developer's perspective, such that someone else is creating the actual design and content for the site. So while usability and content may be more important than the platform, you the programmer have little say in that. What you do need to worry about is that your implementation of the platform is stable, performs well, is secure, and meets any other business goals (like not cost too much, take too long to build, and rank as well with Google as the content supports). Think of this from the perspective of a developer who's done some work for intranet-type applications in a fairly trusted environment, and is about to have his first shot and putting out a potentially popular site for the entire big bad world wide web. Also, I'm looking for something more specific than just a vague "web standards" response. I mean, HTML, JavaScript, and CSS over HTTP are pretty much a given, especially when I've already specified that you're a professional web developer. So going beyond that, Which standards? In what circumstances, and why? Provide a link to the standard's specification.

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  • Proper method to update and draw from game loop?

    - by Lost_Soul
    Recently I've took up the challenge for myself to create a basic 2d side scrolling monster truck game for my little brother. Which seems easy enough in theory. After working with XNA it seems strange jumping into Java (which is what I plan to program it in). Inside my game class I created a private class called GameLoop that extends from Runnable, then in the overridden run() method I made a while loop that handles time and such and I implemented a targetFPS for drawing as well. The loop looks like this: @Override public void run() { long fpsTime = 0; gameStart = System.currentTimeMillis(); lastTime = System.currentTimeMillis(); while(game.isGameRunning()) { currentTime = System.currentTimeMillis(); long ellapsedTime = currentTime - lastTime; if(mouseState.leftIsDown) { que.add(new Dot(mouseState.getPosition())); } entities.addAll(que); game.updateGame(ellapsedTime); fpsTime += ellapsedTime; if(fpsTime >= (1000 / targetedFPS)) { game.drawGame(ellapsedTime); } lastTime = currentTime; } The problem I've ran into is adding of entities after a click. I made a class that has another private class that extends MouseListener and MouseMotionListener then on changes I have it set a few booleans to tell me if the mouse is pressed or not which seems to work great but when I add the entity it throws a CME (Concurrent Modification Exception) sometimes. I have all the entities stored in a LinkedList so later I tried adding a que linkedlist where I later add the que to the normal list in the update loop. I think this would work fine if it was just the update method in the gameloop but with the repaint() method (called inside game.drawGame() method) it throws the CME. The only other thing is that I'm currently drawing directly from the overridden paintComponent() method in a custom class that extends JPanel. Maybe there is a better way to go about this? As well as fix my CME? Thanks in advance!!!

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  • Homepage not showing on Google

    - by MIke Mayberry
    About six weeks ago my homepage (mayberrykayakingdotcodotuk) disappeared from the google organic search for "kayaking pembrokeshire" despite it having been number 2 within a few weeks of it's launch last summer. My previous site (www.mikemayberrykayakingdotcodotuk) had been 2nd for about six years and has 301 redirects for all pages to the new site. Google toolbar still rates the homepage as 3/10 and the domain is still showing in search results, just not the homepage. A little research suggests that this is most likely to be due to an issue with google treating two pages as identical content (one with www. and one with not) since the changes in their algorithms around that time and that the way to fix this is to add some code somewhere. This makes sense to me as my print advertising doesn't have the www part of the address. I have cpanel access but a limited knowledge on web coding, having picked things up as I've gone along and paid for designers etc., when needed. Would someone be able to let me know where I have to go to add the code and what code I need to add to redirect the crawlers to one page? Or is there another issue that is causing this? Thanks in advance.

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  • Simple Interactive Search with jQuery and ASP.Net MVC

    - by Doug Lampe
    Google now has a feature where the search updates as you type in the search box.  You can implement the same feature in your MVC site with a little jQuery and MVC Ajax.  Here's how: Create a javascript global variable to hold the previous value of your search box. Use setTimeout to check to see if the search box has changed after some interval.  (Note: Don't use setInterval since we don't want to have to turn the timer off while Ajax is processing.) Submit the form if the value is changed. Set the update target to display your results. Set the on success callback to "start" the timer again.  This, along with step 2 above will make sure that you don't sent multipe requests until the initial request has finished processing. Here is the code: <script type="text/javascript"> var searchValue = $('#Search').val(); $(function () {     setTimeout(checkSearchChanged, 0.1); }); function checkSearchChanged() {     var currentValue = $('#Search').val();     if ((currentValue) && currentValue != searchValue && currentValue != '') {         searchValue = $('#Search').val();         $('#submit').click();     }     else {         setTimeout(checkSearchChanged, 0.1);     } } </script> <h2>Search</h2> <% using (Ajax.BeginForm("SearchResults", new AjaxOptions { UpdateTargetId = "searchResults", OnSuccess = "checkSearchChanged" })) { %>     Search: <%   = Html.TextBox("Search", null, new { @class = "wide" })%><input id="submit" type="submit" value="Search" /> <% } %> <div id="searchResults"></div> That's it!

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  • Why is my query soooooo slow?

    - by geekrutherford
    A stored procedure used in our production environment recently became so slow it cause the calling web service to begin timing out. When running the stored procedure in Query Analyzer it took nearly 3 minutes to complete.   The stored procedure itself does little more than create a small bit of dynamic SQL which calls a view with a where clause at the end.   At first the thought was that the query used within the view needed to be optimized. The query is quite long and therefore easy to jump to this conclusion.   Fortunately, after bringing the issue to the attention of a coworker they asked "is there a where clause, and if so, is there an index on the column(s) in it?" I had no idea and quickly said as much. A quick check on the table/column utilized in the where clause indicated indeed there was no index.   Before adding the index, and after admitting I am no SQL wiz, I checked the internet for info on the difference between clustered and non-clustered indexes. I found the following site quite helpful OdeToCode. After adding the non-clustered index on the column, the query that used to take nearly 3 minutes now takes 10 seconds! Ah, if only I'd thought to do this ahead of time!

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  • How to collaborate on features using github

    - by Robert Dailey
    github encourages 1 fork per user, so that that user can work independently on a feature and then request that feature to be accepted into the main repository via pull request. However, what if 2 developers need to collaborate on that feature? What is the ideal workflow for this? I could see a number of options: Both developers fork the original repository. Each developer pulls/pushes changes between each other's repository. This seems like a lot of work (tiny micro operations) and also creates a delay between changes, so increases the window for conflicts. Developer 1 forks from the main repository, developer 2 forks from developer 1. Same as #1 mainly but hopefully simplifies Developer 2's life a little? Developer 1 gives Developer 2 permissions to his own fork, so they both work out of the same central repository. Not sure if this is ideal. I'm also curious where branches come into this. Obviously there would be a branch for the feature itself but that branch can't exist in a single place, it would have to exist on multiple forks and be synchronized. Basically just really confused about this workflow, would like an approach for how this can be best accomplished.

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  • How bad would be to focus on iOS/Android development for an indie developer?

    - by kender
    After some time developing games for others I'm thinking of moving towards my own productions. My background is 10+ years of software development, with last 2 years spent on the iOS development (Objective-C and CoronaSDK). With my current experience in Corona I can quickly develop for iOS and Android systems. And this is something that I'm probably gonna do with several of the game ideas I have, at least for the prototype part. But - I'm wondering if it's not a bad idea to focus on those 2 systems only. After all there are other mobile platforms, there are PCs, Macs and Linux boxes... All of them having gamers using them. I was wondering if it wasn't a good idea to try some other SDK, giving me more flexibility when it comes to platform-independance. There's Unity3D (I think I can develop a 2D game in it though), there's MoAI from what I checked. I see a few options, not sure which one is best as I have little experience in this field (publishing own games): Stick with CoronaSDK for the whole time, release for iOS and Android platforms, screw other mobile devices and PCs, Use Corona for prototyping, then when the idea goes more into the "production" phase rewrite it in MoAI or Unity3D for more platforms support, Start with one of those 2 SDKs right now (which means the prototype phase will be delayed a bit, but after that I can jump right into real coding). Any clues here, what to do?

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  • What is wrong with my logic for the divide and conquer algorithm for Closest pair problem?

    - by Programming Noob
    I have been following Coursera's course on Algorithms and came up with a thought about the divide/conquer algorithm for the closest pair problem, that I want clarified. As per Prof Roughgarden's algorithm (which you can see here if you're interested): For a given set of points P, of which we have two copies - sorted in X and Y direction - Px and Py, the algorithm can be given as closestPair(Px,Py): Divide points into left half - Q, and right half - R, and form sorted copies of both halves along x and y directions - Qx,Qy,Rx,Ry Let closestPair(Qx,Qy) be points p1 and q1 Let closestPair(Rx,Ry) be p2,q2 Let delta be minimum of dist(p1,q1) and dist(p2,q2) This is the unfortunate case, let p3,q3 be the closestSplitPair(Px,Py,delta) Return the best result Now, the clarification that I want is related to step 5. I should say this beforehand, that what I'm suggesting, is barely any improvement at all, but if you're still interested, read ahead. Prof R says that since the points are already sorted in X and Y directions, to find the best pair in step 5, we need to iterate over points in the strip of width 2*delta, starting from bottom to up, and in the inner loop we need only 7 comparisions. Can this be bettered to just one? How I think is possible seemed a little difficult to explain in plain text, so I drew a diagram and wrote it on paper and uploaded it here: Since no one else came up with is, I'm pretty sure there's some error in my line of thought. But I have literally been thinking about this for HOURS now, and I just HAD to post this. It's all that is in my head. Can someone point out where I'm going wrong?

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  • Teach Your Kid to Code Coming to Philly.NET

    - by Steve Michelotti
    Originally posted on: http://geekswithblogs.net/michelotti/archive/2014/05/20/teach-your-kid-to-code-coming-to-philly.net.aspxTomorrow night (Wednesday, May 21) my son and I will be at Philly.NET presenting Teach Your Kid to Code. Bring your kid out to Philly.NET with you for a fun evening! After our first talk, I’ll then be giving an introduction to TypeScript. Of any presentation I’ve ever given, this is my favorite: Have you ever wanted a way to teach your kid to code? For that matter, have you ever wanted to simply be able to explain to your kid what you do for a living? Putting things in a context that a kid can understand is not as easy as it sounds. If you are someone curious about these concepts, this is a “can’t miss” presentation that will be co-presented by Justin Michelotti (6th grader) and his father. Bring your kid with you to Philly.NET for this fun and educational session. We will show tools you may not have been aware of like SmallBasic and Kodu – we’ll even throw in a little Visual Studio and JavaScript. Concepts such as variables, conditionals, loops, and functions will be covered while we introduce object oriented concepts without any of the confusing words. Kids are not required for entry!

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  • Why is apt-cache so slow?

    - by Damn Terminal
    After upgrade to Trusty (14.04) from Saucy (13.10), all apt operations are very slow. Even those that do not include downloading anything, or connecting to any servers. For example, displaying the apt policy # time apt-cache policy [...] real 0m8.951s user 0m5.069s sys 0m3.861s takes almost ten seconds! Mostly a weird lag right after issuing the command. And it's the same even if I issue the same command again. On another system it doesn't take a tenth of a second real 0m0.096s user 0m0.070s sys 0m0.023s The other system is a little beefier but there was no noticeable difference before the upgrade. It's the same with apt-get, anything apt-related. How do I find out the source of this lag and fix it? Additional info: # cat /etc/nsswitch.conf # /etc/nsswitch.conf # # Example configuration of GNU Name Service Switch functionality. # If you have the `glibc-doc-reference' and `info' packages installed, try: # `info libc "Name Service Switch"' for information about this file. passwd: compat group: compat shadow: compat hosts: files dns networks: files protocols: db files services: db files ethers: db files rpc: db files netgroup: nis BTW is my understanding of how apt-cache works correct? It doesn't make any network connections when I run apt-cache policy, right? In case I'm wrong and it matters, here are my sources https://gist.github.com/anonymous/02920270ff68e23fc3ec

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  • What to Return with Async CRUD methods C#

    - by RualStorge
    While there is a similar question focused on Java, I've been in debates with utilizing Task objects. What's the best way to handle returns on CRUD methods (and similar)? Common returns we've seen over the years are: Void (no return unless there is an exception) Boolean (True on Success, False on Failure, exception on unhandled failure) Int or GUID (Return the newly created objects Id, 0 or null on failure, exception on unhandled failure) The updated Object (exception on failure) Result Object (Object that houses the manipulated object's ID, Boolean or status field to with success or failure indicated, Exception information if there was one, etc) The concern comes into play as we've started moving over to utilizing C# 5's Async functionality, and this brought the question up of how we should handle CRUD returns large-scale. In our systems we have a little of everything in regards to what we return, we want to make these returns standardized... Now the question is what is the recommended standard? Is there even a recommended standard yet? (I realize we need to decide our standard, but typically we do so by looking at best practices, see if it makes sense for us and go from there, but here we're not finding much to work with)

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  • Thoughts on exception handling.

    - by AndyScott
    Was working on a windows form app (something I haven't done in a while), adding threading and logging so that it would work a little more smoothly and have a record of who did what.  I was just about at the point where I was going to check it into source control when I noticed that the Output window was showing "A first chance exception of type 'System.InvalidCastException' occurred in mscorlib.dll", so I googled it.  In reading some threads about the error, I came across the following comment and it got me thinking: "In addition, while they should be avoided if possible, exceptions are a quite legitimate part of program execution. It's their going unhandled that is a real issue, because that means crashy, crashy." How do you normally use exception handling?  I feel that exceptions are intended to handle errors in code (in my experience generally related to bad data making its way into the system).  Now don't get me wrong, I understand that exceptions happen and should be dealt with, but I feel that they are a "last resort" to keep a program from crashing, but should never be a way to pass data or continue logical processing that could be handled in standard code flow. I mention this, because I have seen it done. What do you think?

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  • phpBB - display a public message when the whole board is private

    - by Sparky672
    In my installation all discussion forums/boards are private and can only be seen after a user registers and admin approves their membership. This is working. When a user first comes to the main phpBB page and they're not logged in, they can see very little except for the login and registration functions. Now I'm trying to configure phpBB to display a Read Me posting that is available to general public before registration or login. The problem is that I'd have to create a whole "public" forum and it would likely contain only one topic thread called "Read Me". The users would have to click into the public forum and then click again to get into the Topic called "Read Me". Is it possible to have a Topic thread outside of a forum? If not, is there another, better, way to achieve this? I just want to display a message, maybe a few short paragraphs to the public, explaining the purpose of the Forum and that they must register and wait for approval in order to gain additional access. I'm not seeing anything like this in the ACP. Thank-you.

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  • Extracting Frustum Planes (Hartmann & Gribbs method)

    - by DAVco
    I have been grappling with the Hartmann/Gribbs method of extracting the Frustum planes for some time now, with little success. There doesn't appear to be a "definitive" topic or tutorial which combines all the necessary information, so perhaps this can be it First of all, I am attempting to do this in C# (For Playstation Mobile), using OpenGL style Column-Major matrices in a Right-Handed coordinate system but obviously the math will work in any language. My projection matrix has a Near plane at 1.0, Far plane at 1000, FOV of 45.0 and Aspect of 1.7647. I want to get my planes in World-Space, so I build my frustum from the View-Projection Matrix (that's projectionMatrix * viewMatrix). The view Matrix is the inverse of the camera's World-Transform. The problem is; regardless of what I tweak, I can't seem to get a correct frustum. I think that I may be missing something obvious. Focusing on the Near and Far planes for the moment (since they have the most obvious normals when correct), when my camera is positioned looking down the negative z-axis, I get two planes facing in the same direction, rather than opposite directions. If i strafe my camera left and right (while still looking along the z axis) the x value of the normal vector changes. Obviously, something is fundamentally wrong here; I just can't figure out what - maybe someone here can?

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  • Reduce weight in healthy way

    - by krnites
    This post is my daily summary of activities that I am going to take to reduce my overall weight by 15 lbs. I am not an overweight person as per my height of 5.11 I have decent weight of 178.4 and good body build. But from a long time(approx 3 month) I am thinking of getting 2-3 abs (note not 6 abs) and reducing my weight to below 170 ( which I was 2 years ago). This post will work as my daily diary of what I ate, what exercises I did, what apps/software I used to monitor my weight loss. Sometime it will not contain much information but some time when I will research will contain information for people who really want to reduce weight. My current target for next few week is to run 2.5 miles everyday under 30 minutes. Eat a lot of fruits and vegetable. No burger or tacos. No meat either fat or lean. And checking body weight after every four hour. Here are reading for today10:00 AM  - 178.22:00 PM    - 178.4I have already ran for 2 miles in 25 minutes, did a little bit of shoulder exercise and had eaten small bowl of vegetable biryani and two bread.I hope this post and all coming post will give the reader the first hand experience of a person who had read every blog and articles related to reducing weight and now trying to do it by implementing all of them by self. My approach will be a healthy way of reducing weight, I am not going to starve my self or going to eat only fruits all day. I will enjoy all the food item that I like to eat and will work hard on my body. This way I will / reduce the weight naturally and will increase the flexibility, durability and immunity of my system /body.

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  • JAVA - multirow array

    - by user51447
    Here is my situation: a company has x number of employees and x number of machines. When someone is sick, the program have to give the best possible solution of people on the machines. But the employees can't work on every machine. I need a code for making little groups of possible solutions. this is a static example private int[][] arrayCompetenties={{0,0,1,0,1},{1,0,1,0,1},{1,1,0,0,1},{1,1,1,1,1},{0,0,0,0,1}}; = row is for the people and columns are for machines m1 m2 m3 m4 m5 m6 m7 p1 1 1 p2 1 1 1 1 p3 1 1 1 p4 1 1 1 p5 1 1 1 1 p6 1 1 1 1 p7 1 1 1 1 1 1 my question = with what code do i connect all the people to machine in groups (all the posibilities) like: p1 - m1 , p2-m2 , p3 - m3 , p4-m4 , p5 - m5 , p6-m6 p1 - m1 , p2-m3 , p3 - m3 , p4-m4 , p5 - m5 , p6-m6 p1 - m1 , p2-m4 , p3 - m5 , p4-m4 , p5 - m5 , p6-m6 p1 - m1 , p2-m5 , p3 - m3 , p4-m4 , p5 - m5 , p6-m6 p1 - m1 , p2-m2 , p3 - m3 , p4-m4 , p5 - m5 , p6-m6 .... i need a loop buth how? =D thanks!

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  • Where is he now?

    - by Chris G. Williams
    A couple months ago, I announced I was leaving Magenic in order to take a break from consulting. I figured I'd post an update as to what I'm doing now, since I haven't exactly been slacking off.1) I accepted a position as a Lead Developer with RealPage. I work on a number of internal use applications for a subsidiary known as LevelOne. The majority of my work is in ASP.NET, a surprising amount of VB.NET, some C# and I'm picking up a few new tools for my belt... specifically Python, MongoDB and Perl.2) I am still the owner of Big Robot Games, a retail game store / coffee shop in the South Carolina upstate region. I'm not as involved in the day to day activity as I was, but I'm there most nights and weekends, when I'm not off doing other things, like #3.3) I am on the staff of Rock Revolt Magazine as a journalist, covering live performances as well as interviewing bands, providing album & video game reviews, fixing the website and the occasional prison ink. (Just kidding on that last one.)4) In whatever time is leftover, I still manage to bang out a little code on Heroic Adventure! (aka HA!) and talk about Windows Phone, XNA and whatever else suits me, wherever they'll let me.I guess that's about it.

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  • Copy to USB memory stick really slow?

    - by Eloff
    When I copy files to the USB device, it takes much longer than in windows (same usb device, same port) it's faster than USB 1.0 speeds (1MB/s) but much slower than USB 2.0 speeds (12MB/s). To copy 1.8GB takes me over 10 minutes (it should be < 3 min.) I have two identical SanDisk Cruzer 8GB sticks, and I have the same problem with both. I have a super talent 32GB USB SSD in the neighboring port and it works at expected speeds. The problem I seem to see in the GUI is that the progress bar goes to 90% almost instantly, completes to 100% a little slower and then hangs there for 10 minutes. Interrupting the copy at this point seems to result in corruption at the tail end of the file. If I wait for it to complete the copy is successful. Any ideas? dmesg output below: [64059.432309] usb 2-1.2: new high-speed USB device number 5 using ehci_hcd [64059.526419] scsi8 : usb-storage 2-1.2:1.0 [64060.529071] scsi 8:0:0:0: Direct-Access SanDisk Cruzer 1.14 PQ: 0 ANSI: 2 [64060.530834] sd 8:0:0:0: Attached scsi generic sg4 type 0 [64060.531925] sd 8:0:0:0: [sdd] 15633408 512-byte logical blocks: (8.00 GB/7.45 GiB) [64060.533419] sd 8:0:0:0: [sdd] Write Protect is off [64060.533428] sd 8:0:0:0: [sdd] Mode Sense: 03 00 00 00 [64060.534319] sd 8:0:0:0: [sdd] No Caching mode page present [64060.534327] sd 8:0:0:0: [sdd] Assuming drive cache: write through [64060.537988] sd 8:0:0:0: [sdd] No Caching mode page present [64060.537995] sd 8:0:0:0: [sdd] Assuming drive cache: write through [64060.541290] sdd: sdd1 [64060.544617] sd 8:0:0:0: [sdd] No Caching mode page present [64060.544619] sd 8:0:0:0: [sdd] Assuming drive cache: write through [64060.544621] sd 8:0:0:0: [sdd] Attached SCSI removable disk

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  • Getting started on Large Projects

    - by Mercfh
    So I just graduated from my College with a B.S. in Comp. Science (although it was a good school, we're the only accredited CS department in our state.....for w/e that means lol) I feel like im a decent programmer, not amazing....but not terrible. Anyways I got my first job about 2 weeks ago, it's a pretty entry level job: firmware development/tester (I know I know people look down on testers...but I gotta start somewhere). Anyways there isn't a whole lot of coding to be had right now (mostly simple stuff) but here soon I have the option of helping out with development (which is what I want to do) Thing is....I have NEVER worked on a huge project. I mean in school sure we had "group" projects but nothing really big. So I'm not super familiar with HUGE classes and such (main language was C++)....Is this something I'll just get used to with time? Some fellow students were used to that with internships and such...but I never got that chance. My job was mostly a "one man job" kinda thing. Mostly little things. Plus in class we never did huge projects anyways. So how do you guys I guess "plan" out these things? Do you use a whiteboard and plan out classes and such....or what. Also...another worry of mine is that I have to use google......ALOT for examples of code, because sometimes I just don't get how something works. Is this normal? It makes me feel sorta.....stupid I guess. I mean "technically" i've had 4-5 years coding experience......but it really only feels like I had 2 years of REAL experience. If that makes any sense? Thanks

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  • Dreaded SQLs

    - by lavanyadeepak
    Dreaded SQLs We used to think that a SQL statement without a where clause is only dangerous right since running that on a server TSQL is just going to impact the entire table like waving the magic wand. For that reason we should cultivate the habit first to write the statement as select and then to modify the select portion as update. Within the T-SQL Window, I would normally prefer the following first: select * from employee where empid in (4,5) and then once I am satisfied with the results, I would go ahead with the following change: --select * delete from employee where empid in (4,5) Today I just discovered another coding horror. This would typically be applicable in a stored procedure and with respect to variable nomenclature. It is always desirable to have a suitable nomenclature for parameters distinct from the column names and internal variables. This would help quicker debugging of the stored procedures besides enhancing the readability. Else in a quick bout of enthusiasm a statement like   if (@CustomerID = @CustomerID) [when the latter is intended to denote the column name and there is a superflous @ prepended], zeroing in on the problem would be little tricky. Had there been a still powerful nomenclature rules then debugging would have been more straight-forward and simpler right?

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  • How to decide if I should take a profit sharing offer or insist on hard cash

    - by Icode4food
    I am currently the sole developer at the very beginning stages of what I think could be a successful startup. My question is simply how to go about determining if I am interested in accepting a permanent stock in the enterprise or if I should insist on hard cash. This startup is seeking venture capital and it is looking likely that they will get something, I don't know how much. I know very little about the business plan or financial operations at all. The founders have experience with other startup type devours that have been successful. From a business perspective I have a reasonable amount of confidence in them. However, I have never met them face to face. They have offered me a partnership in the project but I'm fairly confident that I don't want to do that. I have done some work for them and they really like me so I'm not to afraid of loosing the position all together. I am a young developer with no experience with this sort of thing and need some experience to point me in the right direction. How to I begin to evaluate how much stock or what percentage of the profit should I ask for? Any suggestions at all would be appreciated! P.S. Any suggestions for better tags?

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  • How to sync client and server at the first frame

    - by wheelinlight
    I'm making a game where an authoritative server sends information to all clients about states and positions for objects in a 3d world. The player can control his character by clicking on the screen to set a destination for the character, much like in the Diablo series. I've read most information I can find online about interpolation, reconciliation, and general networking architecture (Valve's for instance). I think I understand everything but one thing seems to be missing in every article I read. Let say we have an interpolation delay of 100ms, server tickrate=50ms, latency=200ms; How do I know when 100ms has past on the client? If the server sends the first update on t=0, can I assume it arrives at t=200, therefore assuming that all packets takes the same amount of time to reach the client? What if the first packet arrives a little quick, for instance at t=150. I would then be starting the client with t=150 and at t=250 it will think it has past 100ms since its connect to the server when it in fact only 50ms has past. Hopefully the above paragraph is understandable. The summarized question would be: How do I know at what tick to start simulating the client? EDIT: This is how I ended up doing it: The client keeps a clock (approximately) in sync with the server. The client then simulates the world at simulationTime = syncedTime - avg(RTT)/2 - interpolationTime The round-trip time can fluctuate so therefore I average it out over time. By only keeping the most recent values when calculating the average I hope to adapt to more permanent changes in latency. It's still to early to draw any conclusion. I'm currently simulating bad network connections, but it's looking good so far. Anyone see any possible problems?

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  • JavaOne Countdown, Are you ready?

    - by Angela Caicedo
    This is a great time of the year!  Not only does the weather start cooling down a bit, but it's time to get ready for JavaOne 2012.  It feels so long since my last JavaOne (last year I missed it because I was on a mom duty), so this year I couldn't be happier to be this close to the action again.  Have you ever been at JavaOne?  There are a million great reasons to love JavaOne, and the most important for me is the atmosphere of the conference: The Java community is there, and Java is in the air! This year we have more than 450 sessions, and there are HOLs (Hands on labs) to get your hands dirty with code.  In addition, there will be very cool demos, an exhibition hall. and a DEMOground.  During the whole time, you will have the opportunity to interact with the speakers, discuss topics and concerns, and even have a drink! Oh yes, I almost forgot, there will be lots of fun even apart from the technology!  For example there will be a Geek Bike Ride, a Thirsty Bear party, and the Appreciation Party with Pearl Jam and Kings of Leon.  How can this get any better! So, are you ready yet?  Have you registered?  If not, just follow this "Register for JavaOne" link and we'll see you there! P.S.  Little known fact: If you are a student you can get your pass for free!!!

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