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• Existent js libs for tileset / map loading and rendering?

  - by ylluminate

  I'm building an rts style overhead tileset game with JavaScript (particularly using Ember.js framework as a base). The map is so large that I'd very much like to be able to load and render the board and layered items in a Google Maps'esque. I'm curious as to whether there are existing libs that would be helpful and already well thought out in these regards vs trying to reinvent the wheel. Are there any such libraries or code examples that would be useful in this area of board / map management?

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• Building AJAX Based Navigation list in ASP.NET MVC and LINQ

  In this article we are going to learn how to develop a custom HTML navigation helper for ASP.NET MVC. The navigation helper also demonstrates the use of ASP.NET MVC AJAX. The navigation from one set of result to another is done using AJAX. I have used VS 2008 and ASP.NET MVC 1.0.

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• An Overview of the SQL Server xml Data Type

  XML is, it seems, everywhere. SQL Server has ever-improving functionality that helps us peek into, shred, store, manipulate and otherwise utilize XML. This article covers XML variables, XML columns, typed vs. untyped XML, and the xml data type methods.

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• Cloud just for hosting big files?

  - by yes123

  I need a solution to store my big files (50MB+ each). Currently I am using an european dedicated server (100MBits) with 8000GB/motnh at 60USD. I would like to use a cloud service that autmatically fetches my files from my server the first time users request it (like a classic cdn) (So I can have all files stored within 1 server) I was looking at Amazon CloudFront and, to get the same bandwidth 8'000 GB/month, I have to pay like 2000 USD vs my 60 USD of my dedicated server. Is there a cheaper alternative?

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• Calculate Quantity Available for POS - Inventory [closed]

  - by tunmise fasipe

  From what I have read Quantity on Hand is the physical number of Items in stock http://www.businessdictionary.com/definition/quantity-on-hand.html Quantity Available is Quantity On Hand minus outbound items (e.g Ordered Quantity) http://community.intuit.com/posts/quantity-on-hand-vs-quantity-available-2 Does this still hold for POS? Can there be outbound items in POS system since items are picked up immediately? If not does that mean QtyOnHand = QtyAvailable for POS?

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• Virtualization Technologies for Network Application Delivery Can Work

  A panel of vendors debate the merits of virtualization technology for networking gear vs. having physical hardware.

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• How to Use the New Visual Studio 2010 Multi-Targeting

  Working on code for projects created in different releases of Visual Studio used to be a big hassle. Visual Studio 2010 improves this and lets you specify the version of the .NET framework and work in its interface while you’re developing in the VS IDE. Click now!

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• ASP.NET and Visual Studio 2010 Service Pack 1

  Want to have a say in what goes into the ASP.NET bits of service pack 1 for VS 2010? Well, spend a few minutes filling out the online survey posted by the ASP.NET team: http://www.surveymonkey.com/s/MLCDPN7 If your most urgent fix doesnt make it into...(read more)...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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• What's so useful about closures (in JS)?

  - by Mark Bubel

  In my quest to understand closures in the context of JS, I find myself asking why do you even need to use closures? What's so great about having an inner function be able to access the parent function's variables even after the parent function returns? I'm not even sure I asked that question correctly because I don't understand how to use them. Can someone give a real world example in JS where a closure is more beneficial vs. the alternative, whatever that may be?

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• Nuget Commands

  - by kasi

  .Net Packages can be installed/uinstalled through the "Package Manager console" or through the VS 2010 option  "Tools" > "Library Package Manager" > "Add Library package reference" : CodePlex under getting started section http://nuget.codeplex.com/documentation?title=Package%20Manager%20Console%20Command%20Reference lists all the commands that are available for execution in package manager console.

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• Des smartphones sous Android... mais avec Bing, Motorola proposera l'OS de Google en Chine avec le m

  Mise à jour du 11/03/10 [NB : Les commentaires sur cette mise à jour commencent ici dans le topic] Chine vs Google : des smartphones sous Android, mais avec Bing L'OS de Google sera proposé avec le moteur de recherche de Microsoft sur les modèles de Motorola Motorola vient de signer un accord pour le moins curieux avec Microsoft. Sur le marché Chinois, le constructeur proposera Bing, le moteur de recherche de Redmond, sur ses smartphones sous Android. Ironique quand on sait...

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• Is there a problem in having same product with different names in different pages?

  - by guisasso

  When ot comes to structured data, schema.org for products, Is there a problem in having the same product with 2 different names in 2 different pages for layout reasons? Example: Category page with many products. Objects appear in smaller divs that don't fit complete name vs product page totally dedicated to one product that fits all the information. Category Page: <span itemprop="name">Dell 30" Monitor</span> Product Page: <span itemprop="name">Dell UltraSharp 30" LCD Monitor</span> Thanks

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• How many java, c# companies in the US? [closed]

  - by bharal

  I was sitting around wondering - is there some way to get a reasonable estimate of the number of java-based companies in, say, the US? And then rolling with that, what about c#? (and so on) let's argue that a company can be both java and c# based - in fact, let's modify it to read "companies that could reasonably hire an xyz developer" Finally, would it be possible to organise this answer in terms of rough size of the companies? "startups" vs established?

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• How to find virtualization performance bottlenecks?

  - by Martin

  We have recently started moving our C++ build server(s) from real machines into VMs. (MS Hyper-V) We have some performance issues that I've currently no idea how to address. We have: Test-Box - this is a piece of desktop workstation hardware my co-worker used to set up the VM before we moved it to the actual server hardware Srv-Box - this is the server hardware Test-Box-Real - This is Windows running directly on the Test-Box HW Test-Box-VM - This is Windows in a Hyper-V VM on the Test-Box HW Srv-Box-Real- This is Server2008R2 running on the Srv-Box HW. Srv-Box-VM- This is Windows running in a Hyper-V VM on the Srv-Box HW, i.e. on Srv-Box-Real. Now, the problem is that we compared Build times between Test-Box-Real and Test-Box-VM and they were basically equal (within about 2%). Then we moved the VM to the Srv-Box machine and what we saw there is that we have a significant performance degradation between Srv-Box-Real and Srv-Box-VM, that is, where we saw no differences on the Test HW we now do see major differences in performance on the actual Server HW. (Builds about ~~ 50% slower inside the VM.) I should add that both the Test-Box and the Srv-Box are only running this one single VM and doing nothing else. I should also note that the "Real" OS is Win2008R2(64bit) and the VM hosted OS is Wind2003R2(32bit). Hardware specs: Srv-Box: Intel XEON E5640 @ 2.67Ghz (This means 8 cores with hyperthreading on the Real system and "only" 4 cores on the VM, since Hyper-V doesn't allow for hyperthreading, but number of cores doesn't seem to explain the problem here.) 16GB RAM (we have 4GB assigned to the VM) Virtual DELL RAID 1 (2x 450GB HUS156045VLS600 Hitachi 15k SAS drives) Test-Box: Intel XEON E31245 @ 3.3GHz 16GB RAM WD VelociRaptor 600GB 10k RPM SATA Note again that I'm only concerned with the differences between Srv-Box-Real and Srv-Box-VM (high) vs. the differences seen btw. Test-Box-Real and Test-Box-VM (low). Why would one machine have parity when comparing VM vs Real performance and the other (server grade HW no less) would have a large disparity? (Both being XEON CPUs ...)

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• Visual Studio 2012 Very Slow Typing

  - by DaoCacao

  I have a problem. After SP1 update, passing some time, VS 2012 becomes very-very slow when typing text. Solution size is not big, PC is quite powerful, it has 16GB of RAM, SSD drive, and i7-2600. I have attached using another VS and I see in debugger a lot of exceptions: First-chance exception at 0x753BB9BC in devenv.exe: Microsoft C++ exception: CVcsException at memory location 0x0027DF0C. First-chance exception at 0x753BB9BC in devenv.exe: Microsoft C++ exception: CVcsException at memory location 0x0027DF0C. First-chance exception at 0x753BB9BC (KernelBase.dll) in devenv.exe: 0xE0434352 (parameters: 0x80131509, 0x00000000, 0x00000000, 0x00000000, 0x64BF0000). First-chance exception at 0x753BB9BC in devenv.exe: Microsoft C++ exception: CVcsException at memory location 0x0027DF0C. First-chance exception at 0x753BB9BC in devenv.exe: Microsoft C++ exception: CVcsException at memory location 0x0027DF0C. First-chance exception at 0x753BB9BC (KernelBase.dll) in devenv.exe: 0xE0434352 (parameters: 0x80131509, 0x00000000, 0x00000000, 0x00000000, 0x64BF0000). The thread 0x288c has exited with code 0 (0x0). Anyone have any ideas on what CVcsException is? Googling it gives almost nothing. How do I get rid of this problem?

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• Setting up Splunk/IronPort WSA

  - by Ciddan

  I recently stumbled across Splunk 4 (by way of an advert on this very site...) and found that it had an "App" that's designed to work with Cisco IronPort WebSecurity and E-Mail Appliances! That's really awesome, because good IronPort reporting is something our IT-dept. is looking for. Anyways - I'm totally lost on how to configure this thing. I've googled like a mad-man to find a guide or such like - but I haven't found anything. Has anyone here set up IP / Splunk? Any tips/pointers?

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• Setting up Splunk/IronPort WSA

  - by Ciddan

  Hello everyone! I recently stumbled across Splunk 4 (by way of an advert on this very site...) and found that it had an "App" that's designed to work with Cisco IronPort WebSecurity and E-Mail Appliances! That's really awesome, because good IronPort reporting is something our IT-dept. is looking for. Anyways - I'm totally lost on how to configure this thing. I've googled like a mad-man to find a guide or such like - but I haven't found anything. Has anyone here set up IP / Splunk? Any tips/pointers? Regards, Mikael Selander

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• PCs using certain IP addresses cannot ping out

  - by Steve McCall

  I'm having a very strange problem which I just can't get past. The way our network is set up, we have 2 locations. The main office with all our PCs, and servers/ We are then joined to a local ISP via microwave link and they provide our internet gateway and house an additional storage server for us. All of the network infrastructure is within our office The problem is... When some PCs (and servers) are assigned IP addresses, they cannot ping the gateway or remote server however the remote server can ping the PC. Most of our internal IP addresses work fine but specific ones (e.g. .29) has this problem all the time. There is nothing else using the ip address and no other network problems. When we switch the IP on the PC, it works fine. Please help, I'm going mad. Thanks, Steve

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• Amazon EC2 Reserved Instances: "Heavy Utilization" clarification

  - by gravyface

  Should be another easy one here, but I need clarification on what they define as "heavy utilization" for Reserved Instance types. From their Website: Heavy Utilization RIs – Heavy Utilization RIs offer the most absolute savings of any Reserved Instance type. They’re most appropriate for steady-state workloads where you’re willing to commit to always running these instances in exchange for our lowest hourly usage fee. With this RI, you pay a little higher upfront payment than Medium Utilization RIs, a significantly lower hourly usage fee, and you’re charged that lower hourly rate for every hour in the Reserved Instance term you purchase. Using Heavy Utilization RIs, you can save up to 41% for a 1-year term and 58% for a 3-year term vs. running On-Demand Instances. If you’re trying to find a break-even utilization, you’re economically advantaged using Heavy Utilization RIs (vs. On-Demand Instances) if you plan to use your instance more than 43% of a 1-year term or 79% of a 3-year term. I'm assuming that, if I'm planning on running a 24/7 Web Server, then regardless of how many resources I consume (bandwidth, cpu cycles, memory), I would want to go with a Heavy Utilization Reserved Instance? This one Web Server in particular will likely barely budge the cpu, but it needs to be up and running 24/7. Not 100% on what they're defining as "heavy".

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• please explain my fio results - is O_SYNC|O_DIRECT misbehaving on linux?

  - by Zoltan

  I'm going mad over figuring out what the problem could be with one of our storage boxes. With a simple fio script I'm testing random writes using bs=1M and direct=1. The SSD is a Samsung 840pro attached to an LSI HBA (3Gbit/s ports). This is the result I'm getting under FreeBSD 9.1: WRITE: io=13169MB, aggrb=224743KB/s, minb=224743KB/s, maxb=224743KB/s, mint=60002msec, maxt=60002msec This is regardless of sync being set to 0 or 1. On linux, this is the result with sync=0: WRITE: io=14828MB, aggrb=253060KB/s, minb=253060KB/s, maxb=253060KB/s, mint=60001msec, maxt=60001msec and with sync=1: WRITE: io=6360.0MB, aggrb=108542KB/s, minb=108542KB/s, maxb=108542KB/s, mint=60001msec, maxt=60001msec My understanding is that since I'm operating on the raw block device, O_SYNC should not make any difference - there's no filesystem, any barrier, anything between the writes and the drive itself. Especially with O_DIRECT|O_SYNC set. Any ideas? For reference, here's the fio script I'm testing with: [global] bs=1M ioengine=sync iodepth=4 size=16g direct=1 runtime=60 filename=/dev/sdh sync=1 [rand-write] rw=randwrite stonewall

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• Volume key occassionally changes relative volume in mixer

  - by bobobobo

  I find this a bit of a nuisance but I usually use the "volume up/down" key on my Microsoft ergo 4000 to change the volume of my system. The problem I'm experiencing is every so often, the volume of Winamp goes way down relative to the other apps in the mixer: So I don't always notice this right away, suddenly I can't hear Brandy warbling. And that makes me sad. Or mad. Or both. But it's a nuisance - is there a special key combination I need to avoid pressing to stop the mixer from imbalancing? Is there a way to disable this "app specific" mixer, because it is completely useless to me.

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• ffmpeg trimming video

  - by Dori

  I am having a problem using ffmpeg which is driving me a little mad, so I hope someone can help me out. I have a 13 MPEG-4 .mp4 video of which I am attempting to trim the first two seconds off using ffmpeg and display in an Android app. From the numerous tuts online i am excecuting the following on the command line ffmpeg -i untrimmed_video.mp4 -vcodec copy -ss 2 trimmed_video.mp4 with no luck as it outputs a video of 4-seconds length (i have no idea where its getting 4 from), if i change this to 3 i still get a 4 second video, if i set it to 10 i get unplayable output. if i move the -ss arg to ffmpeg -vcodec copy -i untrimmed_video.mp4 -ss 2 trimmed_video.mp4 i get output the same length as the input, same as if i move to the end. I have tried lots of variations as orders and nothing seems to work, is this a bug, am i doing something wrong?! please help!!!

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• MySQL Master-Master w/ multiple read slave cost effective setup in AWS

  - by Ross

  I've been evaluating Amazon Web Services RDS for MySQL and costing out potential scenarios involving a simple multi-AZ deployment read/write setup vs. a multi-AZ deployment mysql master (hot-standby) with additional read-only slaves. the issue I'm trying to cost-optimize includes their reserved instance vs on-demand instances. Situation 1: purchase reserved multi-az setup for Extra-large-hi-mem(17GB RAM) instance for $5200/yr and have my application query the master all the time. the problem is, if I don't need all the resources of the (17GB RAM) all the time and therefore, especially not a hot-standby, what alternatives for savings can a better topology create, like potentially situation 2 below: Situation 2: purchase reserved multi-az setup using smaller master instances than above for the master-master hot-standby to receive the writes only. Then create and load balance several read-only slaves off the master and add/remove and/or scale up/down the read slaves based on demand. This might only cost $1000 + the on-demand usage of the read slaves. My thinking is, if I have a variable read-intensive application load, with low write load, the single level topology in situation 1 means I'm paying for a lot of resources at the write level of topology when I don't need them there. My hope is that situation 2 can yield cost savings from smaller reserved instances on the master-master resource level allowing me to scale up and down and/or out on the read-level according to demand as needed. Does anyone see a downside to doing this or know of some reason this isn't possible with RDS? Any other thoughts or advice always welcome of course. Thanks in advance, R

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• Notebook fan spinning at max after trying Linux

  - by Igor Kulman

  I have a Thinkpad T420 (4178-BSG) I use with Windows. The fan (cpu) was always very quiet and I was completely satisfied with it. A few days ago I booted Backtrack Linux from a flashdrive and the fan started to spin at maximum and was very loud. The problem is that this state persists. When I start the Thinkpad and boot Windows as usual the fan start spining at max and never stops. It drives me mad. It looks like somehow the Linux change some settings and I have to suffer. I tried reseting BIOS, updating BIOS, nothing helpes. I even removed the keyboard, looked at the fan but there is no dust.

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• How to remove a virus that trigger the internet explorer every some minutes?

  - by Hoang

  Some days ago, I got a file in Windows Live Messenger by an account of my friend, I thought it was a normal file because he normally sent me some files as well. But this time, I had no luck, he got the virus from someone else. I don't know what happens in my computer excepts that my computer hard disk runs as mad and every some minutes it trigger the internet explorer to launch some ads page, includes doubleclick, cam4, motor, etc.... How do I remove this virus from my computer? I don't have any virus program installed yet. My computer os: Windows Vista, the Windows Firewall is disabled somehow that I could not reenable it.

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