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• Strange characters appearing on websites - ASCII? - UNICODE?

  - by Mick

  I have created many very simple pure HTML websites over the years. Most of them appear to work fine most of the time. But there is one recurring problem which I have never quite sorted out involving strange characters. The scenario goes like this: I create the site. I look at it in my browser, everything appears fine. I may look at it a great many times over the coming weeks or months as I make additions here and there. Perhaps on a variety of browsers on a variety of PC's. Then one day I look at the page and see a random sprinkling of white question marks against dark diamond shapes. These might appear where I had expected to see hyphens or quotes or apostrophes. My immediate thought is that my browser got into some strange state because I was looking at some foreign website with strange characters, but I'm never quite sure. I'm left with that nagging feeling that perhaps half the planet is seeing my website with funny question marks all over it. So my question is what's going on? What should I do to ensure that as many people as possible around the world can view my text as I originally intended? Should I be using those special html sequences like &pound; for all non alphanumeric characters? Should I worry at all? Edit: Right now I have the problem occurring on this page: http://www.fullreservebanking.com/papers.htm ... part of it looks like this: I am using FireFox 5 and the character encoding currently appears to be "UNICODE (UTF-8)". I do not remember manually setting the character encoding to anything since installation. I do occasionally look at Japanese websites for work related reasons - though when I do so, I do not manually make any changes to firefox settings. Edit: Now fixed. Web page altered accordingly.

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• Comparing the Performance of Visual Studio's Web Reference to a Custom Class

  As developers, we all make assumptions when programming. Perhaps the biggest assumption we make is that those libraries and tools that ship with the .NET Framework are the best way to accomplish a given task. For example, most developers assume that using ASP.NET's Membership system is the best way to manage user accounts in a website (rather than rolling your own user account store). Similarly, creating a Web Reference to communicate with a web service generates markup that auto-creates a proxy class, which handles the low-level details of invoking the web service, serializing parameters, and so on. Recently a client made us question one of our fundamental assumptions about the .NET Framework and Web Services by asking, "Why should we use proxy class created by Visual Studio to connect to a web service?" In this particular project we were calling a web service to retrieve data, which was then sorted, formatted slightly and displayed in a web page. The client hypothesized that it would be more efficient to invoke the web service directly via the HttpWebRequest class, retrieve the XML output, populate an XmlDocument object, then use XSLT to output the result to HTML. Surely that would be faster than using Visual Studio's auto-generated proxy class, right? Prior to this request, we had never considered rolling our own proxy class; we had always taken advantage of the proxy classes Visual Studio auto-generated for us. Could these auto-generated proxy classes be inefficient? Would retrieving and parsing the web service's XML directly be more efficient? The only way to know for sure was to test my client's hypothesis. Read More >

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• Entity component system -> handling components that depend on one another

  - by jtedit

  I really like the idea of an entity component system and feel it has great flexibility, but have a question. How should dependent components be handled? I'm not talking about how components should communicate with other components they depend on, I have that sorted, but rather how to ensure components are present. For example, an entity cannot have a "velocity" component if it doesn't have a "position" component, in the same way it cant have an "acceleration" component if it doesn't have a "velocity" component. My first idea was every component class overrides an "onAddedToEntity(Entity ent)" function. Then in that function it checks that prerequisite components are also added to the entity, eg: struct EntCompVelocity() : public EntityComponent{ //member variables here void onAddedToEntity(Entity ent){ if(!ent.hasComponent(EntCompPosition::Id)){ ent.addComponent(new EntCompPosition()); } } } This has the nice property that if the acceleration component adds the velocity component, the velocity component will itself add the position component to the entity so dependency "trees" will sort themselves out. However my concern is if I do this components will silently be added with default values and, in the example of adding position, many entities will appear at the origin. Another idea was to simple have the "Entity.addComponent();" function return false if the component's prerequisite components aren't already on the entity, this would force you to manually add the position component and set its value before adding the velocity component. Finally I could simply not ensure a components prerequisite components are added, the "UpdatePosition" system only deals with entities with both a position and velocity component, so therefore adding a velocity component without having a position component wont be a problem (it wont cause crashes due to null pointer/etc), but it does mean entities will carry useless unused data if you add components but not their prerequisite components. Does anyone have experience with this problem and/or any of these methods to solve it? How did you solve the problem?

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• Column order can matter

  - by Dave Ballantyne

  Ordinarily, column order of a SQL statement does not matter. Select a,b,c from table will produce the same execution plan as   Select c,b,a from table However, sometimes it can make a difference.   Consider this statement (maxdop is used to make a simpler plan and has no impact to the main point):   select SalesOrderID, CustomerID, OrderDate, ROW_NUMBER() over (Partition By CustomerId order by OrderDate asc) as RownAsc, ROW_NUMBER() over (Partition By CustomerId order by OrderDate Desc) as RownDesc from sales.SalesOrderHeader order by CustomerID,OrderDateoption(maxdop 1) If you look at the execution plan, you will see similar to this That is three sorts.  One for RownAsc,  one for RownDesc and the final one for the ‘Order by’ clause.  Sorting is an expensive operation and one that should be avoided if possible.  So with this in mind, it may come as some surprise that the optimizer does not re-order operations to group them together when the incoming data is in a similar (if not exactly the same) sorted sequence.  A simple change to swap the RownAsc and RownDesc columns to produce this statement : select SalesOrderID, CustomerID, OrderDate, ROW_NUMBER() over (Partition By CustomerId order by OrderDate Desc) as RownDesc , ROW_NUMBER() over (Partition By CustomerId order by OrderDate asc) as RownAsc from Sales.SalesOrderHeader order by CustomerID,OrderDateoption(maxdop 1) Will result a different and more efficient query plan with one less sort. The optimizer, although unable to automatically re-order operations, HAS taken advantage of the data ordering if it is as required.  This is well worth taking advantage of if you have different sorting requirements in one statement. Try grouping the functions that require the same order together and save yourself a few extra sorts.

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• Apache, Rewrite Rule and Directories

  - by milo5b

  my sites-available/ file looks something like the following: <VirtualHost *:80> ServerAdmin webmaster@mysite ServerName mysite.co.uk ServerAlias www.mysite.co.uk DocumentRoot /home/mysite.co.uk/htdocs/ <Directory /home/mysite.co.uk/htdocs/> Options -Indexes FollowSymlinks MultiViews AllowOverride All Order allow,deny allow from all </Directory> ErrorLog ${APACHE_LOG_DIR}/mysite.co.uk/error.log LogLevel warn CustomLog ${APACHE_LOG_DIR}/mysite.co.uk/access.log combined </VirtualHost> In .htaccess (in the htdocs/), I have (amongst others) the following rewrite rule: RewriteRule ^enquiries$ /enquiries.php Somehow I have also a directory named "enquiries" (/home/mysite.co.uk/htdocs/enquiries/), and when I hit the url "www.mysite.co.uk/enquiries" I get: HTTP/1.1 301 Moved Permanently Date: Mon, 10 Dec 2012 18:53:37 GMT Server: Apache/2.2.16 (Debian) Location: http://www.mysite.co.uk/enquiries/ Vary: Accept-Encoding Content-Type: text/html; charset=iso-8859-1 And a Browser would display the directory's content. Now, I could easily rename the folder and get it sorted, but I would like to understand what's going on here. What would be the correct way to configure Apache in a way that it wont behave this way, and instead would listen to the Rewrite Rule? If I did not explain myself clearly, please feel free to ask more questions, I'd be happy to answer them. Thanks!

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• Comparing the Performance of Visual Studio's Web Reference to a Custom Class

  As developers, we all make assumptions when programming. Perhaps the biggest assumption we make is that those libraries and tools that ship with the .NET Framework are the best way to accomplish a given task. For example, most developers assume that using ASP.NET's Membership system is the best way to manage user accounts in a website (rather than rolling your own user account store). Similarly, creating a Web Reference to communicate with a web service generates markup that auto-creates a proxy class, which handles the low-level details of invoking the web service, serializing parameters, and so on. Recently a client made us question one of our fundamental assumptions about the .NET Framework and Web Services by asking, "Why should we use proxy class created by Visual Studio to connect to a web service?" In this particular project we were calling a web service to retrieve data, which was then sorted, formatted slightly and displayed in a web page. The client hypothesized that it would be more efficient to invoke the web service directly via the HttpWebRequest class, retrieve the XML output, populate an XmlDocument object, then use XSLT to output the result to HTML. Surely that would be faster than using Visual Studio's auto-generated proxy class, right? Prior to this request, we had never considered rolling our own proxy class; we had always taken advantage of the proxy classes Visual Studio auto-generated for us. Could these auto-generated proxy classes be inefficient? Would retrieving and parsing the web service's XML directly be more efficient? The only way to know for sure was to test my client's hypothesis. Read More >

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• Why do the order of uniforms gets changed by the compiler?

  - by Aybe

  I have the following shader, everything works fine when setting the value of one of the matrices but I've discovered that getting a value back is incorrect for View and Projection, they are in reverse order. #version 430 precision highp float; layout (location = 0) uniform mat4 Model; layout (location = 1) uniform mat4 View; layout (location = 2) uniform mat4 Projection; layout (location = 0) in vec3 in_position; layout (location = 1) in vec4 in_color; out vec4 out_color; void main(void) { gl_Position = Projection * View * Model * vec4(in_position, 1.0); out_color = in_color; } When querying their location they are effectively reversed, I did a small test by renaming View to Piew which puts it before Projection if sorted alphabetically and the order is correct. Now if I do remove layout (location = ...) from the uniforms, the problem disappears !? I am starting to think that this is a driver bug as explained in the wiki. Do you know why the order of the uniforms is changed whenever the shader is compiled ? (using an AMD HD7850)

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• Is Linq having a mind-numbing effect on .NET programmers?

  - by Aaronaught

  A lot of us started seeing this phenomenon with jQuery about a year ago when people started asking how to do absolutely insane things like retrieve the query string with jQuery. The difference between the library (jQuery) and the language (JavaScript) is apparently lost on many programmers, and results in a lot of inappropriate, convoluted code being written where it is not necessary. Maybe it's just my imagination, but I swear I'm starting to see an uptick in the number of questions where people are asking to do similarly insane things with Linq, like find ranges in a sorted array. I can't get over how thoroughly inappropriate the Linq extensions are for solving that problem, but more importantly the fact that the author just assumed that the ideal solution would involve Linq without actually thinking about it (as far as I can tell). It seems that we are repeating history, breeding a new generation of .NET programmers who can't tell the difference between the language (C#/VB.NET) and the library (Linq). What is responsible for this phenomenon? Is it just hype? Magpie tendencies? Has Linq picked up a reputation as a form of magic, where instead of actually writing code you just have to utter the right incantation? I'm hardly satisfied with those explanations but I can't really think of anything else. More importantly, is it really a problem, and if so, what's the best way to help enlighten these people?

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• What's the best algorithm for... [closed]

  - by Paska

  Hi programmers! Today come out a little problem. I have an array of coordinates (latitude and longitude) maded in this way: [0] = "45.01234,9.12345" [1] = "46.11111,9.12345" [2] = "47.22222,9.98765" [...] etc In a loop, convert these coordinates in meters (UTM northing / UTM easting) and after that i convert these coords in pixel (X / Y) on screen (the output device is an iphone) to draw a route line on a custom map. [0] = "512335.00000,502333.666666" [...] etc The returning pixel are passed to a method that draw a line on screen (simulating a route calculation). [0] = "20,30" [1] = "21,31" [2] = "25,40" [...] etc As coordinate (lat/lon) are too many, i need to truncate lat/lon array eliminating the values that doesn't fill in the map bound (the visible part of map on screen). Map bounds are 2 couple of coords lat/lon, upper left and lower right. Now, what is the best way to loop on this array (NOT SORTED) and check if a value is or not in bound and after remove the value that is outside? To return a clean array that contains only the coords visible on screen? Note: the coords array is a very big array. 4000/5000 couple of items. This is a method that should be looped every drag or zoom. Anyone have an idea to optimize search and controls in this array? many thanks, A

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• Why does 'top' say my machine is only 50% idle?

  - by Chris Moore

  What's going on here? I'm running nothing on the system, iotop and iftop show the network and hard drive are both idle, and top (sorted by %CPU) shows nothing running. So why is the system only 50% idle? What's the other 50% waiting for? How can I find out? top - 12:01:05 up 3 days, 15:03, 1 user, load average: 6.00, 6.01, 6.05 Tasks: 179 total, 1 running, 178 sleeping, 0 stopped, 0 zombie Cpu(s): 0.7%us, 0.0%sy, 0.0%ni, 49.7%id, 49.7%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 2053996k total, 1992600k used, 61396k free, 81680k buffers Swap: 4092924k total, 10740k used, 4082184k free, 1338636k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1042 deb 20 0 21468 1412 1000 R 1 0.1 0:00.03 top 1 root 20 0 24188 1952 1152 S 0 0.1 0:01.44 init 2 root 20 0 0 0 0 S 0 0.0 0:00.05 kthreadd Update: dmesg shows the printer driver misbehaving: [28858.561847] cnijnetprn[1503]: segfault at 29 ip 00007f56cf3480f7 sp 00007fffb964ec30 error 4 in libcnnet.so.1.2.0[7f56cf345000+9000] [68851.187802] cnijnetprn[9180]: segfault at 29 ip 00007ffe7636a0f7 sp 00007fff9a8b1990 error 4 in libcnnet.so.1.2.0[7ffe76367000+9000] [155412.107826] cnijnetprn[19966]: segfault at 29 ip 00007fc31de770f7 sp 00007fffc03aa8e0 error 4 in libcnnet.so.1.2.0[7fc31de74000+9000] and also some issue with cp: [248041.172067] INFO: task cp:27488 blocked for more than 120 seconds. [248041.172071] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [248041.172075] cp D ffffffff81805120 0 27488 27345 0x00000004 [248041.172080] ffff880078d57a38 0000000000000046 ffff880078d579d8 ffffffff81032a79 [248041.172085] ffff880078d57fd8 ffff880078d57fd8 ffff880078d57fd8 0000000000012a40 [248041.172090] ffff88007b818000 ffff880069acc560 ffff880078d57a18 ffff88007f8532c0 [248041.172095] Call Trace: [248041.172104] [<ffffffff81032a79>] ? default_spin_lock_flags+0x9/0x10 [248041.172109] [<ffffffff8110a360>] ? __lock_page+0x70/0x70 [248041.172114] [<ffffffff815f0ecf>] schedule+0x3f/0x60 I did try copying something to the USB stick that's plugged into the router and mounted onto this computer using mount.cifs. That almost always causes everything to lock up, so I'm guessing that's the problem. I'll reboot and stop using mount.cifs.

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• How do I use depth testing and texture transparency together in my 2.5D world?

  - by nbolton

  Note: I've already found an answer (which I will post after this question) - I was just wondering if I was doing it right, or if there is a better way. I'm making a "2.5D" isometric game using OpenGL ES (JOGL). By "2.5D", I mean that the world is 3D, but it is rendered using 2D isometric tiles. The original problem I had to solve was that my textures had to be rendered in order (from back to front), so that the tiles overlapped properly to create the proper effect. After some reading, I quickly realised that this is the "old hat" 2D approach. This became difficult to do efficiently, since the 3D world can be modified by the player (so stuff can appear anywhere in 3D space) - so it seemed logical that I take advantage of the depth buffer. This meant that I didn't have to worry about rendering stuff in the correct order. However, I faced a problem. If you use GL_DEPTH_TEST and GL_BLEND together, it creates an effect where objects are blended with the background before they are "sorted" by z order (meaning that you get a weird kind of overlap where the transparency should be). Here's some pseudo code that should illustrate the problem (incidentally, I'm using libgdx for Android). create() { // ... // some other code here // ... Gdx.gl.glEnable(GL10.GL_DEPTH_TEST); Gdx.gl.glEnable(GL10.GL_BLEND); } render() { Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT); Gdx.gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA); // ... // bind texture and create vertices // ... } So the question is: How do I solve the transparency overlap problem?

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• Automatic Appointment Conflict Resolution

  - by Thomas

  I'm trying to figure out an algorithm for resolving appointment times. I currently have a naive algorithm that pushes down conflicting appointments repeatedly, until there are no more appointments. # The appointment list is always sorted on start time appointment_list = [ <Appointment: 10:00 -> 12:00>, <Appointment: 11:00 -> 12:30>, <Appointment: 13:00 -> 14:00>, <Appointment: 13:30 -> 14:30>, ] Constraints are that appointments: cannot be after 15:00 cannot be before 9:00 This is the naive algorithm for i, app in enumerate(appointment_list): for possible_conflict in appointment_list[i+1:]: if possible_conflict.start < app.end: difference = app.end - possible_conflict.start possible_conflict.end += difference possible_conflict.start += difference else: break This results in the following resolution, which obviously breaks those constraints, and the last appointment will have to be pushed to the following day. appointment_list = [ <Appointment: 10:00 -> 12:00>, <Appointment: 12:00 -> 13:30>, <Appointment: 13:30 -> 14:30>, <Appointment: 14:30 -> 15:30>, ] Obviously this is sub-optimal, It performs 3 appointment moves when the confict could have been resolved with one: if we were able to push the first appointment backwards, we could avoid moving all the subsequent appointments down. I'm thinking that there should be a sort of edit-distance approach that would calculate the least number of appointments that should be moved in order to resolve the scheduling conflict, but I can't get the a handle on the methodology. Should it be breadth-first or depth first solution search. When do I know if the solution is "good enough"?

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• Split a 2D scene in layers or have a z coordinate

  - by Bane

  I am in the process of writing a 2D game engine, and a dilemma emerged. Let me explain the situation... I have a Scene class, to which various objects can be added (Drawable, ParticleEmitter, Light2D, etc), and as this is a 2D scene, things will obviously be drawn over each other. My first thought was that I could have basic add and remove methods, but I soon realized that then there would be no way for the programmer to control the order in which things were drawn. So I can up with two options, each with its pros and cons. A) Would be to split the scene in layers. By that I mean instead of having the scene be a container of objects, have it be a container of layers, which are in turn the containers of objects. B) Would require to have some kind of z-coordinate, and then have the scene sorted so objects with lower z get drawn first. Option A is pretty solid, but the problem is with the lights. In what layer do I add it? Does it work cross-layer? On all bottom layers? And I still need the Z coordinate to calculate the shadow! Option B would require me to change all my code from having Vector2D positions, to some kind of class that inherits from Vector2D and adds a z coordinate to it (I don't want it to be a Vector3D because I still need all the same methods the 2D kind has, just with .z clamped on). Am I missing something? Is there an alternative to these methods? I'm working in Javascript, if that makes a difference.

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• Evaluating a Programmer for Startup

  - by HelpJ

  Hi, I have sorted through the previous questions and couldn't find a specific answer to the following (and thank you in advance): I have fully developed my idea on paper and am looking to move forward with it, create it, and grow it. Since I am non-technical, I am looking to either partner or employ (I would pay for his/her services) for a very talented and well-rounded programmer to help create and develop the project. I am looking for someone that can act as a IT manager/CTO and get the job done while I use my resources to develop and deploy the strategy, deal with the business side of things, raise capital, grow, etc. However, due to my lack of IT knowledge, it is always hard for me to differentiate between a good and bad programmer and therefore only find out if he/she is good or not when it is too late. So my question that I have been asking everyone around me is "How do I assess whether the programmer is good or not if I cannot evaluate them myself?" and "Is there any website that reviews and rates programmers?" I have asked many to refer me to talented programmers but all are either not local (important for me to work side by side with them), happily employed or working on their own startup. I have also asked these programmers to help me find others but none seem to be able to help. Any help would be extremely appreciated. Thank you so much, HelpJ

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• Can non-IT people handle a wiki?

  - by Andrew Heath

  (I'm hoping that some of you will have encountered this issue before and can offer some insights...) My company is looking to improve their market research data management. Current data management style: "Hey Jimbo, where's that picture of our WhatZit 2.0? "yeah I remember that email about that company from that guy, gimme a few minutes to search my Outlook" "who has the newest copy of the Important Competitor's product catalogue? Mine is from '09." ... "Colleen does, and she's on maternity leave. You'll have to call her to get her workstation password..." Desired data management style: data organized neatly by topic (legal, economic, industrial, competitor) for each topic, multiple media types stored together (company product images, press releases, contact info) but still neatly sorted by type data editing histories communal access (no data silos) I was thinking about setting up a department wiki for all users to access. It seems to satisfy the four criteria above, but I'm a little concerned about how user-friendly (read: decipherable to non-technical people) it is for the more advanced features like image galleries, article formatting, and the like. Has anyone here setup a wiki for non-IT people and had it not catch on fire//become a ghost town//look like Geocities? Bonus question: can you see any obvious drawbacks to my choice of MediaWiki (or any other wiki) for solving this problem? Thank you.

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• Ideal data structure/techniques for storing generic scheduler data in C#

  - by GraemeMiller

  I am trying to implement a generic scheduler object in C# 4 which will output a table in HTML. Basic aim is to show some object along with various attributes, and whether it was doing something in a given time period. The scheduler will output a table displaying the headers: Detail Field 1 ....N| Date1.........N I want to initialise the table with a start date and an end date to create the date range (ideally could also do other time periods e.g. hours but that isn't vital). I then want to provide a generic object which will have associated events. Where an object has events within the period I want a table cell to be marked E.g. Name Height Weight 1/1/2011 2/1/2011 3/1/20011...... 31/1/2011 Ben 5.11 75 X X X Bill 5.7 83 X X So I created scheduler with Start Date=1/1/2011 and end date 31/1/2011 I'd like to give it my person object (already sorted) and tell it which fields I want displayed (Name, Height, Weight) Each person has events which have a start date and end date. Some events will start and end outwith but they should still be shown on the relevant date etc. Ideally I'd like to have been able to provide it with say a class booking object as well. So I'm trying to keep it generic. I have seen Javasript implementations etc of similar. What would a good data structure be for this? Any thoughts on techniques I could use to make it generic. I am not great with generics so any tips appreciated.

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• Character movement on a 2D tile map

  - by Chris Morris

  I'm working at making a HTML5 game. Top down, closest thing I can equate it to is the gameboy zeldas, but open world and no rooms. What I have so far is a procedurally generated map in a multi dimensional array. And a starting position on the map. Along with this I have an array of movable and non movable tile ID's. I also have a class for my player and have him being rendered out in the center of the starting tile. My problem however is getting the movement sorted out for the player. I want to be able to have the character free move around the map (pixel by pixel essentially) ontop of this 2D generated world. Ideally this would allow the user to move around the walk able area of the canvas. this is simple enough for me to do, but I am having problems now moving the world. If the user is 20% from the edge of the screen i want the world to start panning in the direction the player is heading. But I'm rather lacking in ideas of how to do this. I've looked around for some tutorials, but am coming up blank on ideas of how to generate the playable area (zoomed in) and to then move this generated area under the player when they reach near the end of the screen. My current idea was to generate a certain amount of tiles full size to fill the screen and place the player i the middle. Then when the user approaches the edge of the screen start generating the tiles offset by the distance moved and the direction. I can kind of see this working but I really have no idea if this is the best or easiest to code of methods for generating the world. sorry for the lack of code but I'm still just in the theory stages of working this all out.

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• Configure Unity Lenses and what they search

  - by Sindre

  I'm using Ubuntu 12.10. I've read about a lense (ppa:pydave/unity-lenses) that you can replace with the original files and folders lense, so you can search all your files. Instead of the current which only search used/recently used files and programs. I couldn't get this to work with 12.10, got a bunch of errors when I tried adding the ppa. I would like to set up a lens that can search all my files and folders (from all of my 3 hdd's), one that search through my videos (ability to specify which folders) and the same for music. So basically I would like to set up three specific lenses that each get a set of specified folders that they search through. If this is not possible, is there atleast a way to configure the current Files and Folders lense to ignore certain folders? I don't like when my dash shows files that I don't want to be shown. I should add that I'm completely new to Ubuntu and I apologize beforehand if this information could easily be found. But I wasn't able to find something like this. Edit: I found out how I can use the Privacy application to ignore what I want, so that's sorted now. Sorry for not researching it more. But my question regarding the lenses still stand. All help is greatly appreciated.

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• SQL Server DBA - How to get a good one!

  - by ETFairfax

  I'm a lone developer. I am currently developing an application which is seeing me get way way way out of my depth when it comes to SQL DBA'ing, and have come to realise that I should hire a DBA to help me (which has full support from the company). Problem is - who? This SO thread sees someone hire a DBA only to realise that they will probably cause more harm then good! Also, I have just had a bad experience with a ASP.NET/C# contractor that has let us down. So, can anyone out there on SO either... a) Offer their services. b) Forward me onto someone that could help. c) Give some tips on vetting a DBA. I know this isn't a recruitment site, so maybe some good answers for c) would be a benefit for other readers!! BTW: The database is SQL Server 2008. I'm running into performance issues (mainly timeouts) which I think would be sorted out by some proper indexing. I would also need the DBA to provide some sort of maintenance plan, and to review how our database will deal what we intend at throwing at it in the future!

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• How to make it so units don't stack up in one location?

  - by Daggio

  So I'm making a game in AS3, it's a strategy DotA-like game (for flash game equivalent, there's UDE) so far so good, I have the A* pathfinding algorithm all sorted out and the minion units move to the desired location as I want them to be. The problem a rise when a unit stops in a node that has already occupied by another friendly unit. Both (or more than two) of them stacks up in one location, it looks like they're one unit. I want to add collision detection so when they collide they don't stack up together. But now they stop when they collide on they way to a node. This isn't good because they won't move at all midway (they won't respond to enemy attacks like that). I've added a deltatime so they only stopped for 2 seconds before they move again to their designated designation. This moves them again but they flicker. Not how I want it. So, like the title said. How to make more than one units don't stack up in a node? And if possible, how to make them not flicker while moving (it's good if they can tell other friendly units on the way and avoid them accordingly)?

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• What You Said: How You Organize a Messy Music Collection

  - by Jason Fitzpatrick

  Earlier this week we asked you to share your tips, tricks, and tools, for managing a messy music collection. Now we’re back to share so great reader tips; read on to find ways to tame your mountain of music. Several readers were, despite having tried various techniques over the years, fans of doing things largely the manual way. Aurora900 explains: I spent a weekend sorting everything myself once. Took a while, but now I have folders sorted by artist, and within the artist folders are folders for their albums. With my collection at about 260gb, it can be a daunting task, but it’s well worth it in the end. I don’t have the tagging issue as I make sure anything I have is properly tagged to begin with… If I’m ripping a CD I use Easy CD-DA Extractor, which automatically searches a database on the internet for the tags. If I’m downloading something, if its from a reputable source its going to be properly tagged already. Bilbo Baggins would love to automate, but eclectic music tastes make it hard: How to Own Your Own Website (Even If You Can’t Build One) Pt 3 How to Sync Your Media Across Your Entire House with XBMC How to Own Your Own Website (Even If You Can’t Build One) Pt 2

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• Working with documents and SharePoint - Best practices

  - by KunaalKapoor

  Follow these simple guidelines to make collaboration using SharePoint easier:1. File Name:While it is allowed to use spaces in your filename (and maybe it seems even logical to do so), don’t use them if your file will end up (or is born on) SharePoint. When you use the “download a copy” functionality, SharePoint will replace the spaces with an “_”. This might (will) result in inconsistency when you upload the “same” file again, since SharePoint will see this as a different file (since the filename is different). I recommend using a filename with Capitalization style naming guideline. For instance: the document “Overall governance model.docx” would be named “OverallGovernanceModel.docx”Use the TITLE field in the office applications to give your document a title (and subtitle and keywords, .) The title column can be used in a view in a library. You can get to the document properties by clicking on 'Office Button/Prepare/Properties'. (Office 2007). This is metadata that is stored with the document, and will remain in the document (even if you exchange this document via e-mail, via an external hard drive). The filename cannot be longer than 128 characters. (and that is IMHO far beyond reasonable) You cannot use any of these characters: ” # % & * : < > ? \ / { | } ~ 2. Versioning:SharePoint has a built-in versioning system. You can work with major (published) versions, and minor (draft) versions. Of each of these two document types, you can store a numbers of versions that are kept. Watch out, each version is saved, not only the delta between 2 versions, and this counts to your Site Collection Quota. (Example: you have a Word document with a size of 2 MB. When you keep 5 Drafts this will result in storing (and consuming) 10 MB.So, don’t call your document “NewUserAccountProcessDRAFTv1.docx”, but “NewUserAccountProcess.docx” and use versioning setting in your library.You can enable views on your library to display the version number.You can enable the version number to be displayed in a Word document.3. Use MetadataUse metadata to assign other properties to documents, so it can be easily identified, sorted- or grouped by.

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• Why is Ubuntu One slow to sync in 11.10, either backup or any sub-folder contents?

  - by pst007x

  I have been trying to sync my documents folder of 1.4GB, it still hasn't worked and it has been syncing for a month. The top level syncs, files and folders in the Document folders, but contents of sub-folders just hang. (Gave up and stopped syncing this folder) However,I have tried using the backup facility in 11.10, to backup to Ubuntu One.... I upgraded my HDD space in Ubuntu One. It has been going now for 24hours-ish and only backed up what looks like a couple of percent. (By the way what an excellent idea to backup to Ubuntu One, if only we could get it to actually work! :-o) The odd thing is I can sync to drop box within hours, rather than months. This is bad, and has been an issue since Ubuntu One's release. I have reported this problem and there were promises in later releases this would be fixed, but it hasn't. Canonical cannot help either... I posted on several blogs, a lot of people have the same problem but no fixes. So do I use dropbox or another service, until it is sorted, as Ubuntu does not seem to see this as an issue, I think a fix will be a long time in coming. (However,I love the potential of Ubuntu One and the integration with the OS) Yes my internet speeds are fine, etc... :-) No firewall (sudo ufw status: STATUS: INACTIVE), No Proxy, etc NB: I have raised this as a separate question to others posted here, because my question relates to Ubuntu 11.10, though I have commented elsewhere for help. Plus my question also relates to deja-dup backup to Ubuntu One. Thanks

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• How to store prices that have effective dates?

  - by lal00

  I have a list of products. Each of them is offered by N providers. Each providers quotes us a price for a specific date. That price is effective until that provider decides to set a new price. In that case, the provider will give the new price with a new date. The MySQL table header currently looks like: provider_id, product_id, price, date_price_effective Every other day, we compile a list of products/prices that are effective for the current day. For each product, the list contains a sorted list of the providers that have that particular product. In that way, we can order certain products from whoever happens to offer the best price. To get the effective prices, I have a SQL statement that returns all rows that have date_price_effective >= NOW(). That result set is processed with a ruby script that does the sorting and filtering necessary to obtain a file that looks like this: product_id_1,provider_1,provider_3,provider8,provider_10... product_id_2,provider_3,provider_2,provider1,provider_10... This works fine for our purposes, but I still have an itch that a SQL table is probably not the best way to store this kind of information. I have that feeling that this kind of problema has been solved previously in other more creative ways. Is there a better way to store this information other than in SQL? or, if using SQL, is there a better approach than the one I'm using?

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• Problem with wake after suspend using USB remote.

  - by Bod

  Hi, I'm a linux newbie looking for some help. I'm currently setting up an XBMC HTPC using a laptop and 10.10 and all works great except for waking from resume using the power button on the remote. The suspend works from remote works fine as does the resume using the power button on the laptop. I've checked /proc/acpi/wakeup which initially showed the following. Device S-state Status Sysfs node C096 S5 *disabled pci:0000:00:1e.0 C0F1 S3 *disabled pci:0000:00:1d.0 C0F8 S3 *disabled pci:0000:00:1d.1 C0F9 S3 *disabled pci:0000:00:1d.2 C0FA S3 *disabled pci:0000:00:1d.3 C0FB S3 *disabled pci:0000:00:1d.7 C102 S5 *disabled pci:0000:00:1c.0 C22B S5 *disabled pci:0000:08:00.0 C115 S5 *disabled pci:0000:00:1c.2 C22C S5 *disabled C118 S5 *disabled pci:0000:00:1c.3 C22C S5 *disabled I've since configured the above so that the S3 devices above are enabled. I've confirmed that they are the correct devices using lspci 00:1d.0 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #1 (rev 01) 00:1d.1 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 (rev 01) 00:1d.2 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 (rev 01) 00:1d.3 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 (rev 01) 00:1d.7 USB Controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller (rev 01) None of this has worked unfortunately and I'm now stuck. It simply refuses to wakeup from the remote. The USB receiver shows no activity LED while suspended. Suspend/resume from the remote works fine from Windows 7 so I know the laptop is ok with it. Any ideas? I need to get this sorted to gain Wife Approval for this system. Thanks, Bod.

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