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  • Size of a sharepoint web application

    - by Indra
    How do you figure out the current size of the sharepoint web application? Better yet, the size of a site collection or a subsite. I am planning to move a site collection from one farm to another. I need to plan the storage capacity first.

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  • Rule of thumb in RAM estimate for static pages? [closed]

    - by IMB
    Possible Duplicate: How do you do Load Testing and Capacity Planning for Web Sites I've seen tutorials saying they can run decent websites on 64MB RAM (Debian/Lighttpd/PHP/MySQL) however it's not clearly defined how much hits/traffic a "decent" site gets. Is there a rule of thumb on how much RAM a web server needs? To keep things simple, let's say you're running a site with static content and it's averaging at 100,000 hits per hour (HTML + images combined, no MySQL). How much RAM is the minimum requirement for that?

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  • Detection of battery status totally messed up

    - by Faabiioo
    I already posted this question in the Ubuntu forum and stackOverflow. I forward it here with the hope to find some different opinions about the problem. I have an Acer TravelMate 5730, which is 3 y.o., running Ubuntu 10.04 LTS. One year ago I changed the battery because the old one died. Since then, everything worked like a charm. A week ago I was using my laptop running on battery; it was charged up to 60%. Suddenly it shut down and for about 24h it was like the battery was totally broken: it didn't charge anymore and the 'upower --dump' said state: critical. I was kind of resigned to buy a new battery, when suddenly the orange light became green: battery was charged and actually working; strangely the battery indicator was stuck to 100%, even after 2 hours running. I tried again with 'upower --dump' or 'acpi -b' commands and it kept saying battery is discharging, though maintaining the percentage to 100%. Thus, battery working fine up to 3 hours, without any warning when it was almost empty, likely to result in a brute shut down. Today something different. the 'upower --dump' command says: ... present: yes rechargeable: yes state: fully-charged energy: 0 Wh energy-empty: 0 Wh energy-full: 65.12 Wh energy-full-design: 65.12 Wh energy-rate: 0 W voltage: 14.481 V percentage: 0% capacity: 100% technology: lithium-ion I tried to boot WinXP and the problem is pretty much the same, with the battery fully-charged, percentage equal to 0% and no way to fix it. While writing, the situation has changed again: present: yes rechargeable: yes state: charging energy: 0 Wh energy-empty: 0 Wh energy-full: 65.12 Wh energy-full-design: 65.12 Wh energy-rate: 0 W voltage: 14.474 V percentage: 0% capacity: 100% technology: lithium-ion ...charging, but it does not charge up. (Recall, the battery lasted 3 hours until yesterday!). So, the big question is: is it an hardware issue, like a dedicated internal circuit is broken? or maybe it is just the battery that must be changed. Or, rather, some BIOS problem that could be fixed in some way. I'd appreciate every help that can shed some light on this annoying problem thanks

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  • Increase/refresh the size of the FreeBSD's main partition

    - by Lucas
    I am using VirtualBox and have my FreeBSD mounted on a virtual drive, which recently ran out of space (10 GB) so I have increased the Virtual Drive size up to the 15 GB - started my FreeBSD and its still out of space, because it doesnt "refresh" the main partition size: # df -h Filesystem Size Used Avail Capacity Mounted on /dev/ada0p2 9.3G 9.3G -711M 108% / devfs 1.0k 1.0k 0B 100% /dev How can I set the partition size to the virtual drive size?

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  • RAM upgrade, what options are suitable?

    - by user55150
    I have a Dell GX520 optiplex model (mini tower), and I want to upgrade its RAM. I currently have 1GB RAM and I want to upgrade to 2GB. All I know about RAM is its capacity, and I've heard about speeds lately like 400mhz, 533mhz, 800mhz, 1333mhz. I want to know what are the differences among them and can my PC support all those types of speeds or not? And what is the most suitable one for my Dell PC, to avoid any problems or limitations.

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  • My external HD turned to RAW - How to recover my data?

    - by Matan Eldan
    I have an external HD (WD MyBook Essentials) with all of my backups (1TB) for some unknown reason, when I try to connect the drive (Tried several interfaces: eSATA/plugged it into my PC/USB) I get this message: "You need to format the disk in drive M: before you can use it" I've looked in disk management at the drive, and its listed in there - with the same full capacity. The file system under disk management now says RAW and that its healthy

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  • determining server config

    - by tristan625
    I have recently set up a Linux server for my college which also hosts the college website and other downloadables. This server is linked to outside world using a leased line connection of 1mbps capacity. My problem is that the users complain that the downloads from the server are very slow, how can I imporve this? What things should I be looking at. My current server config: Dell vostro260s with 4Gb of ram and i3 processor.

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  • Including Overestimates in MSF Agile Burndown Report

    After using the MSF Agile Burndown report for a few weeks in our new TFS 2010 environment, I have to say I am a huge fan.  I especially find the assignment of Work (hours) portion to be very useful in motivating the team to keep their tasks up to date every day.  Here is a view of the report that you get out of the box. However, I have one problem.  Id like the top line to have some more meaning.  Specifically, when it is changing is that an indication of scope creep, mis-estimation or a combination of the two.  So, today I decided to try to build in a view that would show overestimated time.  This would give me a more consistent top line.  My idea was to add another visual area on top of the graph whenever my originally estimated time was greater than the sum of completed and remaining.  This will effectively show me at least when the top line goes down whether it was scope change or over-estimation. Here is the final result. How did I do it?  Step 1: Add Cumulative_Original_Estimate field to the dsBurndown My approach was to follow the pattern where the completed time is included in the burndown chart and add my Overestimated hours.  First I added a field to the dsBurndown to hold the estimated time.         <Field Name="Cumulative_Original_Estimate">           <DataField><?xml version="1.0" encoding="utf-8"?><Field xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xsi:type="Measure" UniqueName="[Measures].[Microsoft_VSTS_Scheduling_OriginalEstimate]" /></DataField>           <rd:TypeName>System.Int32</rd:TypeName>         </Field> Step 2: Add a column to the query SELECT {     [Measures].[DateValue],     [Measures].[Work Item Count],     [Measures].[Microsoft_VSTS_Scheduling_RemainingWork],     [Measures].[Microsoft_VSTS_Scheduling_CompletedWork],     [Measures].[Microsoft_VSTS_Scheduling_OriginalEstimate],     [Measures].[RemainingWorkLine],     [Measures].[CountLine] Step 3: Add a new Item to the QueryDefinition <Item> <ID xsi:type="Measure"> <MeasureName>Microsoft_VSTS_Scheduling_OriginalEstimate</MeasureName> <UniqueName>[Measures].[Microsoft_VSTS_Scheduling_OriginalEstimate]</UniqueName> </ID> <ItemCaption>Cumulative Original Estimate</ItemCaption> <FormattedValue>true</FormattedValue> </Item> Step 4: Add a new ChartMember to DundasChartControl1 The burndown chart is called DundasChartControl1.  I need to add a ChartMember for the estimated time. <ChartMember>   <Label>Cumulative Original Estimate</Label> </ChartMember> Step 5: Add a ChartSeries to show the Overestimated Time <ChartSeries Name="OriginalEstimate">   <Hidden>=IIF(Parameters!YAxis.Value="count",True,False)</Hidden>   <ChartDataPoints>     <ChartDataPoint>       <ChartDataPointValues>         <Y>=IIF(Parameters!YAxis.Value = "hours", IIF(SUM(Fields!Cumulative_Original_Estimate.Value)>SUM(Fields!Cumulative_Completed_Work.Value+Fields!Cumulative_Remaining_Work.Value), SUM(Fields!Cumulative_Original_Estimate.Value-(Fields!Cumulative_Completed_Work.Value+Fields!Cumulative_Remaining_Work.Value)),Nothing),Nothing)</Y>       </ChartDataPointValues>       <ChartDataLabel>         <Style>           <FontFamily>Microsoft Sans Serif</FontFamily>           <FontSize>8pt</FontSize>         </Style>       </ChartDataLabel>       <Style>         <Border>           <Color>#9bdb00</Color>           <Width>0.75pt</Width>         </Border>         <Color>#666666</Color>         <BackgroundGradientEndColor>#666666</BackgroundGradientEndColor>       </Style>       <ChartMarker>         <Style />       </ChartMarker>       <CustomProperties>         <CustomProperty>           <Name>LabelStyle</Name>           <Value>Top</Value>         </CustomProperty>       </CustomProperties>     </ChartDataPoint>   </ChartDataPoints>   <Type>Area</Type>   <Subtype>Stacked</Subtype>   <Style />   <ChartEmptyPoints>     <Style>       <Color>#00ffffff</Color>     </Style>     <ChartMarker>       <Style />     </ChartMarker>     <ChartDataLabel>       <Style />     </ChartDataLabel>   </ChartEmptyPoints>   <LegendName>Default</LegendName>   <ChartItemInLegend>     <LegendText>Overestimated Hours</LegendText>   </ChartItemInLegend>   <ChartAreaName>Default</ChartAreaName>   <ValueAxisName>Primary</ValueAxisName>   <CategoryAxisName>Primary</CategoryAxisName>   <ChartSmartLabel>     <Disabled>true</Disabled>     <MaxMovingDistance>22.5pt</MaxMovingDistance>   </ChartSmartLabel> </ChartSeries> Thats it.  I find the improved report to add some value over the out of the box version.  You can download the updated rdl for the report here.  Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • SonicAgile 2.0 with a Real-Time Backlog and Kanban

    - by Stephen.Walther
    I’m excited to announce the launch of SonicAgile 2.0 which is a free Agile Project Management tool.  You can start using it right now (for free) by visiting the following address: http://sonicagile.com/ What’s special about SonicAgile?  SonicAgile supports a real-time backlog and kanban. When you make changes to the backlog or kanban then those changes appear on every browser in real-time. For example, if multiple people open the Kanban in their browser, and you move a card on the backlog from the To Do column to the Done column then the card moves in every browser in real-time. This makes SonicAgile a great tool to use with distributed teams. SonicAgile has all of the features that you need in an Agile Project Management tool including: Real-time Backlog – Prioritize all of your stories using drag-and-drop. Real-time Kanban – Move stories from To Do, In Progress, to Done Burndown Charts – Track the progress of your team as your work burns down over time. Iterations – Group work into iterations (sprints). Tasks – Break long stories into tasks. Acceptance Criteria – Create a checklist of requirements for a story to be done. Agile Estimation – Estimate the amount of work required to complete a story using Points, Shirt Sizes, or Coffee Cup sizes. Time-Tracking – Track how long it takes to complete each story and task. Roadmap – Do release planning by creating epics and organizing the epics into releases. Discussions – Discuss each story or epic by email. Watch the following video for a quick 3 minute introduction: http://sonicagile.com/ Read the following guide for a more in-depth overview of the features included in SonicAgile: http://sonicagile.com/guide-agile-project-management-using-sonicagile/ I’d love to hear your feedback!  Let me know what you think by posting a comment.

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  • SQL SERVER – How to Change Compatibility of Database to SQL Server 2014

    - by Pinal Dave
    Yesterday I wrote about how we can install SQL Server 2014. Right after the blog post was live, I received a question from the developer that he has installed SQL Server 2014 and attached a database file from previous version of SQL Server. Right after attaching database, he was not able to work with the latest features of Cardinality Estimation. As soon as he sent me email I realize what has happened exactly. When he attached database, the database compatibility was set to still of the earlier version of SQL Server. To use most of the latest features of SQL Server 2014, one has to change the compatibility level of the database to the latest version (i.e. 120). Here are two different ways how we can change the compatibility of database to SQL Server 2014′s version. 1) Using Management Studio For this method first to go database and right click over it. Now select properties. On this screen user can change the compatibility level to 120. 2) Using T-SQL Script. You can execute following script and change the compatibility settings to 120. USE [master] GO ALTER DATABASE [AdventureWorks2012] SET COMPATIBILITY_LEVEL = 120 GO   Well, it is that easy :-) Reference: Pinal Dave (http://blog.SQLAuthority.com)Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL

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  • Stereo images rectification and disparity: which algorithms?

    - by alessandro.francesconi
    I'm trying to figure out what are currently the two most efficent algorithms that permit, starting from a L/R pair of stereo images created using a traditional camera (so affected by some epipolar lines misalignment), to produce a pair of adjusted images plus their depth information by looking at their disparity. Actually I've found lots of papers about these two methods, like: "Computing Rectifying Homographies for Stereo Vision" (Zhang - seems one of the best for rectification only) "Three-step image recti?cation" (Monasse) "Rectification and Disparity" (slideshow by Navab) "A fast area-based stereo matching algorithm" (Di Stefano - seems a bit inaccurate) "Computing Visual Correspondence with Occlusions via Graph Cuts" (Kolmogorov - this one produces a very good disparity map, with also occlusion informations, but is it efficient?) "Dense Disparity Map Estimation Respecting Image Discontinuities" (Alvarez - toooo long for a first review) Anyone could please give me some advices for orienting into this wide topic? What kind of algorithm/method should I treat first, considering that I'll work on a very simple input: a pair of left and right images and nothing else, no more information (some papers are based on additional, pre-taken, calibration infos)? Speaking about working implementations, the only interesting results I've seen so far belongs to this piece of software, but only for automatic rectification, not disparity: http://stereo.jpn.org/eng/stphmkr/index.html I tried the "auto-adjustment" feature and seems really effective. Too bad there is no source code...

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  • Inheriting projects - General Rules? [closed]

    - by pspahn
    Possible Duplicate: When is a BIG Rewrite the answer? Software rewriting alternatives Are there any actual case studies on rewrites of software success/failure rates? When should you rewrite? We're not a software company. Is a complete re-write still a bad idea? Have you ever been involved in a BIG Rewrite? This is an area of discussion I have long been curious about, but overall, I generally lack the experience to give myself an answer that I would fully trust. We've all been there, a new client shows up with a half-complete project they are looking to finish and launch. For whatever reason, they fired their previous developer, and it's now up to you to save the day. I am just finishing up a code review for a new client, and in my estimation is would be better to scrap what the previous developers built since and start from scratch. There's a ton of reasons why I am leaning toward this way, but it still makes me nervous since the client isn't going to want to hear "those last guys built you a big turd, and I can either polish it, or throw it in the trash". What are your general rules for accepting these projects? How do you determine whether it will be better to start from scratch or continue with the existing code base? What other extra steps might you take to help control client expectations, since the previous developer may have inflated those expectations beyond a reasonable level? Any other general advice?

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  • Inheriting projects - General Rules?

    - by pspahn
    This is an area of discussion I have long been curious about, but overall, I generally lack the experience to give myself an answer that I would fully trust. We've all been there, a new client shows up with a half-complete project they are looking to finish and launch. For whatever reason, they fired their previous developer, and it's now up to you to save the day. I am just finishing up a code review for a new client, and in my estimation is would be better to scrap what the previous developers built since and start from scratch. There's a ton of reasons why I am leaning toward this way, but it still makes me nervous since the client isn't going to want to hear "those last guys built you a big turd, and I can either polish it, or throw it in the trash". What are your general rules for accepting these projects? How do you determine whether it will be better to start from scratch or continue with the existing code base? What other extra steps might you take to help control client expectations, since the previous developer may have inflated those expectations beyond a reasonable level? Any other general advice?

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  • Standard ratio of cookies to "visitors"?

    - by Jeff Atwood
    As noted in a recent blog post, We see a large discrepancy between Google Analytics "visitors" and Quantcast "visitors". Also, for reasons we have never figured out, Google Analytics just gets larger numbers than Quantcast. Right now GA is showing more visitors (15 million) on stackoverflow.com alone than Quantcast sees on the whole network (14 million): Why? I don’t know. Either Google Analytics loses cookies sometimes, or Quantcast misses visitors. Counting is an inexact science. We think this is because Quantcast uses a more conservative ratio of cookies-to-visitors. Whereas Google Analytics might consider every cookie a "visitor", Quantcast will only consider every 1.24 cookies a "visitor". This makes sense to me, as people may access our sites from multiple computers, multiple browsers, etcetera. I have two closely related questions: Is there an accepted standard ratio of cookies to visitors? This is obviously an inexact science, but is there any emerging rule of thumb? Is there any more accurate way to count "visitors" to a website other than relying on browser cookies? Or is this just always going to be kind of a best-effort estimation crapshoot no matter how you measure it?

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  • How to represent an agile project to people focused on waterfall [closed]

    - by ahsteele
    Our team has been asked to represent our development efforts in a project plan. No one is unhappy with our work or questioning our ability to deliver, we are just participating in an IT cattle call for project plans. Trouble is we are an agile team and haven't thought about our work in terms of a formal project plan. While we have a general idea of what we are working on next we aren't 100% sure until we plan an iteration. Until now our team has largely operated in a vacuum and has not been required to present our methodology or metrics to outside parties. We follow most of the practices espoused in Extreme Programming. We hold quarterly planning meetings to have a general idea of the stories we are going to work on for a quarter. That said, our stories are documented on 3x5 cards and are only estimated at the beginning of the iteration in which they are going to be worked. After estimation we document the story in Team Foundation Sever. During an iteration, we attach code to stories and mark stories as completed once finished. From this data we are able to generate burn down and velocity charts. Most importantly we know our average velocity for an iteration keeping us from biting off more than we can chew. I am not looking to modify the way we do development but want to present our development activities in a report that someone only familiar with waterfall will understand. In What Does an Agile Project Plan Look Like, Kent McDonald does a good job laying out the differences between agile and waterfall project plans. He specifies the differences in consumable bullets: An agile project plan is feature based An Agile Project Plan is organized into iterations An Agile Project Plan has different levels of detail depending on the time frame An Agile Project Plan is owned by the Team Being able to explain the differences is great, but how best to present the data?

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  • Complexity of defense AI

    - by Fredrik Johansson
    I have a non-released game, and currently it's only possible to play with another human being. As the game rules are made up by me, I think it would be great if new players could learn basic game play by playing against an AI opponent. I mean it's not like Tennis, where the majority knows at least the fundamental rules. On the other hand, I'm a bit concerned that this AI implementation can be quite complex. I hope you can help me with an complexity estimation. I've tried to summarize the gameplay below. Is this defense AI very hard to do? Basic Defense Game Play Player Defender can move within his land, i.e. inside a random, non-convex, polygon. This land will also contain obstacles modeled as polygons, that Defender has to move around. Player Attacker has also a land, modeled as another such polygon. Assume that Defender shall defend against Attacker. Attacker will then throw a thingy towards Defender's land. To be rewarded, Attacker wants to hit Defender's land, and Defender will want to strike away the thingy from his land before it stops to prevent Attacker from scoring. To feint Defender, Attacker might run around within his land before the throw, and based on these attacker movements Defender shall then continuously move to the best defense position within his land.

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  • Advice on developing a social network [on hold]

    - by Siraj Mansour
    I am doing research on assembling a team, using the right tools, and the cost to develop a highly responsive social network that is capable of dealing with a lot of users. Similar to the Facebook concept but using the basics package for now. Profile, friends, posts, updates, media upload/download, streaming, chat and Inbox messaging are all in the package. We certainly do not expect it to be as popular as Facebook or handle the same number of users and requests, but in its own game it has to be a monster, and expandable for later on. Neglecting the hosting, and servers part, i am looking for technical advise and opinions, on what kind of team i need ? how many developers ? their expertise ? What are the right tools ? languages ? frameworks ? environments ? Any random ideas about the infrastructure ? Quick thoughts on the development process ? Please use references, if you have any to support your ideas. Development cost mere estimation ? NEGLECTING THE COST OF SERVERS I know my question is too broad but my knowledge is very limited and i need detailed help, for any help you can offer i thank you in advance.

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  • Execution plan warnings–All that glitters is not gold

    - by Dave Ballantyne
    In a previous post, I showed you the new execution plan warnings related to implicit and explicit warnings.  Pretty much as soon as i hit ’post’,  I noticed something rather odd happening. This statement : select top(10) SalesOrderHeader.SalesOrderID, SalesOrderNumberfrom Sales.SalesOrderHeaderjoin Sales.SalesOrderDetail on SalesOrderHeader.SalesOrderID = SalesOrderDetail.SalesOrderID   Throws the “Type conversion may affect cardinality estimation” warning.     Ive done no such conversion in my statement why would that be ?  Well, SalesOrderNumber is a computed column , “(isnull(N'SO'+CONVERT([nvarchar](23),[SalesOrderID],0),N'*** ERROR ***'))”,  so thats where the conversion is.   Wait!!! Am i saying that every type conversion will throw the warning ?  Thankfully, no.  It only appears for columns that are used in predicates ,even if the predicate / join condition is fine ,  and the column is indexed ( and/or , presumably has statistics).    Hopefully , this wont lead to to many wild goose chases, but is definitely something to bear in mind.  If you want to see this fixed then upvote my connect item here.

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  • How to manage and estimate unstructured requirements received from customers

    - by user20358
    A lot of the times I receive a software system's requirements from our customers in a very unstructured format. It is usually a bunch of "product development" guys from the customer's who come up with these "proposed solutions" to the business problems they have. While they are the experts at the business domain, a lot of the times they don't have the solutions right. This results in multiple versions of the same requirement mixing up of two requirements into one a few versions of the requirement later down the line, the requirements which were combined together get separated out again, each taking with it some of the new additions How do you work with such requirements coming in and sort them out into proper use cases and before development begins? What tools can we use to track a particular requirement's history, from the first time it was conceived till the time it gets crystallized into a proper use case? Estimating work against requirements received in such a fashion is a nightmare which ends up in making mistakes in understanding the requirement correctly and estimating the effort against it correctly. Any tips, tools, tricks to make this activity more manageable? I'm just trying to get some insights from someone more experienced than I am in requirements management and effort estimation.

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  • Are there design patterns or generalised approaches for particle simulations?

    - by romeovs
    I'm working on a project (for college) in C++. The goal is to write a program that can more or less simulate a beam of particles flying trough the LHC synchrotron. Not wanting to rush into things, me and my team are thinking about how to implement this and I was wondering if there are general design patterns that are used to solve this kind of problem. The general approach we came up with so far is the following: there is a World that holds all objects you can add objects to this world such as Particle, Dipole and Quadrupole time is cut up into discrete steps, and at each point in time, for each Particle the magnetic and electric forces that each object in the World generates are calculated and summed up (luckily electro-magnetism is linear). each Particle moves accordingly (using a simple estimation approach to solve the differential movement equations) save the Particle positions repeat This seems a good approach but, for instance, it is hard to take into account symmetries that might be present (such as the magnetic field of each Quadrupole) and is this thus suboptimal. To take into account such symmetries as that of the Quadrupole field, it would be much easier to (also) make space discrete and somehow store form of the Quadrupole field somewhere. (Since 2532 or so Quadrupoles are stored this should lead to a massive gain of performance, not having to recalculate each Quadrupole field) So, are there any design patterns? Is the World-approach feasible or is it old-fashioned, bad programming? What about symmetry, how is that generally taken into acount?

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  • Alternatives to time tracking methodologies [closed]

    - by Brandon Wamboldt
    Question first: What are some feasible alternatives to time tracking for employees in a web/software development company, and why are they better options Explanation: I work at a company where we work like this. Everybody is paid salary. We have 3 types of work, Contract, Adhoc and Internal (Non billable). Adhoc is just small changes that take a few hours and we just bill the client at the end of the month. Contracts are signed and we have this big long process, the usual. We figure out how much to charge by getting an estimation of the time involved (From the design and the developers), multiplying it by our hourly rate and that's it. So say we estimate 50 hours for a website. We have time tracking software and have to record the time in 15 we spend on it (7:00 to 7:15 for example), the project name, and give it some comments. Now if we go over the 50 hours, we are both losing money and are inefficient. Now that I've explained how the system works, my question is how else can it be done if a better method exists (Which I'm sure one must). Nobody here likes the current system, we just can't find an alternative. I'd be more than willing to work after hours longer hours on a project to get it done in time, but I'm much inclined to do so with the current system. I'd love to be able to sum up (Or link) to this post for my manager to show them why we should use abc system instead of this system.

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  • Day in the Life of Agile - The Forge Michigan November 27, 2012

    - by csmith18119
    Went to training at The Forge yesterday and did a Day in the life of Agile with Pillar.  It was pretty good. Check them out at: http://pillartechnology.com/ Abstract: A single-day agile project simulation that is engaging, educational, provocative, and fun. This simulation introduces concepts like time-boxed iterations, User Stories, collective estimation, commitment to a product owner for iteration scope, formal verification ritual at iteration conclusion, tracking velocity, and making results big and visible through charts. The exercise is designed to simulate not only how agile teams and practices work, but the inevitable challenges that arise as teams attempt to adopt such practices. One of the best parts of this training was getting some hands on experience with agile.  We used a program called Scratch to create an arcade video game.  Our team chose Frogger.  We had 3 iterations at 20 minutes each.  I think we did pretty good but in the panic of trying to get a bunch done in only 20 minutes made it interesting. To check out our project, I uploaded it to my CodePlex site Download Source Code (Under Scratch/Frogger) Cool class! I highly recommend if you get the opportunity.

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  • SortList duplicated key, but it shouldn't

    - by Luca
    I have a class which implements IList interface. I requires a "sorted view" of this list, but without modifying it (I cannot sort directly the IList class). These view shall be updated when the original list is modified, keeping items sorted. So, I've introduced a SortList creation method which create a SortList which has a comparer for the specific object contained in the original list. Here is the snippet of code: public class MyList<T> : ICollection, IList<T> { ... public SortedList CreateSortView(string property) { try { Lock(); SortListView sortView; if (mSortListViews.ContainsKey(property) == false) { // Create sorted view sortView = new SortListView(property, Count); mSortListViews.Add(property, sortView); foreach (T item in Items) sortView.Add(item); } else sortView = mSortListViews[property]; sortView.ReferenceCount++; return (sortView); } finally { Unlock(); } } public void DeleteSortView(string property) { try { Lock(); // Unreference sorted view mSortListViews[property].ReferenceCount--; // Remove sorted view if (mSortListViews[property].ReferenceCount == 0) mSortListViews.Remove(property); } finally { Unlock(); } } protected class SortListView : SortedList { /// <summary> /// /// </summary> /// <param name="property"></param> /// <param name="capacity"></param> public SortListView(string property, int capacity) : base(new GenericPropertyComparer(typeof(T).GetProperty(property, BindingFlags.Instance | BindingFlags.Public)), capacity) { } /// <summary> /// Reference count. /// </summary> public int ReferenceCount = 0; /// <summary> /// /// </summary> /// <param name="item"></param> public void Add(T item) { Add(item, item); } /// <summary> /// /// </summary> /// <param name="item"></param> public void Remove(T item) { // Base implementation base.Remove(item); } /// <summary> /// Compare object on a generic property. /// </summary> class GenericPropertyComparer : IComparer { #region Constructors /// <summary> /// Construct a GenericPropertyComparer specifying the property to compare. /// </summary> /// <param name="property"> /// A <see cref="PropertyInfo"/> which specify the property to be compared. /// </param> /// <remarks> /// The <paramref name="property"/> parameter imply that the compared objects have the specified property. The property /// must be readable, and its type must implement the IComparable interface. /// </remarks> public GenericPropertyComparer(PropertyInfo property) { if (property == null) throw new ArgumentException("property doesn't specify a valid property"); if (property.CanRead == false) throw new ArgumentException("property specify a write-only property"); if (property.PropertyType.GetInterface("IComparable") == null) throw new ArgumentException("property type doesn't IComparable"); mSortingProperty = property; } #endregion #region IComparer Implementation public int Compare(object x, object y) { IComparable propX = (IComparable)mSortingProperty.GetValue(x, null); IComparable propY = (IComparable)mSortingProperty.GetValue(y, null); return (propX.CompareTo(propY)); } /// <summary> /// Sorting property. /// </summary> private PropertyInfo mSortingProperty = null; #endregion } } /// <summary> /// Sorted views of this ReactList. /// </summary> private Dictionary<string, SortListView> mSortListViews = new Dictionary<string, SortListView>(); } Practically, class users request to create a SortListView specifying the name of property which determine the sorting, and using the reflection each SortListView defined a IComparer which keep sorted the items. Whenever an item is added or removed from the original list, every created SortListView will be updated with the same operation. This seems good at first chance, but it creates me problems since it give me the following exception when adding items to the SortList: System.ArgumentException: Item has already been added. Key in dictionary: 'PowerShell_ISE [C:\Windows\sysWOW64\WindowsPowerShell\v1.0\PowerShell_ISE.exe]' Key being added: 'PowerShell_ISE [C:\Windows\system32\WindowsPowerShell\v1.0\PowerShell_ISE.exe]' As you can see from the exception message, thrown by SortedListView.Add(object), the string representation of the key (the list item object) is different (note the path of the executable). Why SortList give me that exception? To solve this I tried to implement a GetHashCode implementation for the underlying object, but without success: public override int GetHashCode() { return ( base.GetHashCode() ^ mApplicationName.GetHashCode() ^ mApplicationPath.GetHashCode() ^ mCommandLine.GetHashCode() ^ mWorkingDirectory.GetHashCode() ); }

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  • Windows 8 RTM ‘Keyboard Shortcuts’ Super List

    - by Asian Angel
    Now that Windows 8 RTM has been out for a bit you may be wondering about all of the new keyboard shortcuts associated with the system. Yash Tolia from the MSDN blog has put together a super list of all the keyboard shortcuts you could ever want into one awesome post. A quick copy, paste, and save/print using your favorite word processing program will help keep this terrific list on hand for easy reference whenever you need it! List of Windows 8 Shortcuts [Nirmal TV] HTG Explains: What The Windows Event Viewer Is and How You Can Use It HTG Explains: How Windows Uses The Task Scheduler for System Tasks HTG Explains: Why Do Hard Drives Show the Wrong Capacity in Windows?

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