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  • More Than a Map - Computerlogy

    More Than a Map - Computerlogy In Bangkok, Thailand we met with the co-founder of Computerlogy, Vachara Aemavat. Computerlogy is a Google Maps API development shop. Among their many great projects, they have built a great store locator for Siam Commercial Bank and a viral maps app that helps people find high ground during the Thai flood seasons. Read more on morethanamap.com #morethanamap From: GoogleDevelopers Views: 60 4 ratings Time: 02:04 More in Science & Technology

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  • SMBfs mounting OK, listing OK, Read KO, smbclient OK

    - by Kwaio
    I've tried to make the title the most meaningfull I could but it still looks ugly. The premises. We are using RHEL3-U8 as OS on most servers here, don't ask me why or suggest to upgrade, it's not on today's schedule. That means kernel used is 2.4.21 I have no access to the remote server, but I know it is a netApp NAS rack. $> smbclient --version Version 3.0.9-1.3E.9 Here is the /etc/fstab line : //NASHOSTNAME/share /mnt/mydir smbfs ro,uid=123,gid=123,workgroup=XXXX,credentials=/somefile 0 0 Here is the following mount output line //NASHOSTNAME/share on /mnt/mydir type smbfs (0) The symptoms. I can list the share without problems, even cd in there. The issue appears if I try to read any file : $> cat /mnt/mydir/fileX.txt cat: /mnt/mydir/fileX.txt: Input/output error In the system logs (/var/log/kernel for example) the following errors appear. Jul 30 15:40:02 hostname kernel: smb_errno: class ERRHRD, code 31 from command 0x2 Jul 30 15:40:02 hostname kernel: smb_errno: class ERRHRD, code 31 from command 0x2 Jul 30 15:40:02 hostname kernel: smb_open: fileX.txt open failed, result=-5 Jul 30 15:40:02 hostname kernel: smb_errno: class ERRHRD, code 31 from command 0x2 Jul 30 15:40:02 hostname kernel: smb_errno: class ERRHRD, code 31 from command 0x2 Jul 30 15:40:02 hostname kernel: smb_open: fileX.txt open failed, result=-5 Jul 30 15:40:02 hostname kernel: smb_readpage_sync: fileX.txt open failed, error=-5 The ERRHRD code 0x001F error is "General hardware failure" although it seems samba sometimes uses it for a different purpose, see http://www.ubiqx.org/cifs/SMB.html [Strange behaviour Alert] Additionnal informations : There is another SMB mountpoint on the system pointing to a (linux) host using samba and this one works. What I have tried. I have tried adding debug=4 to the mounting options and remounting the share and the logs still look the same. I have tried to mount the share with smbclient and I am able to fetch files with the get command. Both targets are in the same subnet, so network problem should be out, even if the LAN goes through a VPN with optimizers, MTU has already been decreased to 1450. I can also mount the share through NFS but then the files are all root.root 700 and I need to read them with another user...

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  • A tale of two (and more) apps

    Robert Cooper gave a great lightning talk at our recent Atlanta GTUG meetup, where he discussed using a single codebase to target multiple mediums (e.g. Android, Facebook, Wave...

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  • June 2013 release of SSDT contains a minor bug that you should be aware of

    - by jamiet
    I have discovered what seems, to me, like a bug in the June 2013 release of SSDT and given the problems that it created yesterday on my current gig I thought it prudent to write this blog post to inform people of it. I’ve built a very simple SSDT project to reproduce the problem that has just two tables, [Table1] and [Table2], and also a procedure [Procedure1]: The two tables have exactly the same definition, both a have a single column called [Id] of type integer. CREATE TABLE [dbo].[Table1] (     [Id] INT NOT NULL PRIMARY KEY ) My stored procedure simply joins the two together, orders them by the column used in the join predicate, and returns the results: CREATE PROCEDURE [dbo].[Procedure1] AS     SELECT t1.*     FROM    Table1 t1     INNER JOIN Table2 t2         ON    t1.Id = t2.Id     ORDER BY Id Now if I create those three objects manually and then execute the stored procedure, it works fine: So we know that the code works. Unfortunately, SSDT thinks that there is an error here: The text of that error is: Procedure: [dbo].[Procedure1] contains an unresolved reference to an object. Either the object does not exist or the reference is ambiguous because it could refer to any of the following objects: [dbo].[Table1].[Id] or [dbo].[Table2].[Id]. Its complaining that the [Id] field in the ORDER BY clause is ambiguous. Now you may well be thinking at this point “OK, just stick a table alias into the ORDER BY predicate and everything will be fine!” Well that’s true, but there’s a bigger problem here. One of the developers at my current client installed this drop of SSDT and all of a sudden all the builds started failing on his machine – he had errors left right and centre because, as it transpires, we have a fair bit of code that exhibits this scenario.  Worse, previous installations of SSDT do not flag this code as erroneous and therein lies the rub. We immediately had a mass panic where we had to run around the department to our developers (of which there are many) ensuring that none of them should upgrade their SSDT installation if they wanted to carry on being productive for the rest of the day. Also bear in mind that as soon as a new drop of SSDT comes out then the previous version is instantly unavailable so rolling back is going to be impossible unless you have created an administrative install of SSDT for that previous version. Just thought you should know! In the grand schema of things this isn’t a big deal as the bug can be worked around with a simple code modification but forewarned is forearmed so they say! Last thing to say, if you want to know which version of SSDT you are running check my blog post Which version of SSDT Database Projects do I have installed? @Jamiet

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  • Google I/O 2012 - How we Make JavaScript Widgets Scream

    Google I/O 2012 - How we Make JavaScript Widgets Scream Malte Ubl, John Hjelmstad When loading websites every millisecond counts. Social widgets should enhance a website experience and they should definitely not slow it down. We'll walk through the unique challenges of loading social widgets such as the +1 button and how we made sure that they load as fast as possible -- yes, there will be war stories! While we'll focus on widget performance, many of the techniques we used have wider applicability and we'll show how they can make your website faster, too. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 734 3 ratings Time: 51:44 More in Science & Technology

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  • Announcing the Drive Installation Scope

    Announcing the Drive Installation Scope On September 12, Google Drive released a new feature of great interest to many Drive web app developers: the installation scope. In this session we'll discuss the benefits of the installation scope, walk through the related documentation, and do a brief demo of how it works. From: GoogleDevelopers Views: 0 0 ratings Time: 00:00 More in Science & Technology

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  • More Than a Map - Ubilabs

    More Than a Map - Ubilabs In Hamburg, Germany we met with certified Google Maps API development partner Ubilabs. Ubilabs founders Michael Pletziger and Martin Kleppe showed us some of the Google Maps API driven projects they have built for Germany's largest brands such as Deutsche Telekom, Blitzer.de, and BMW. Read more on morethanamap.com #morethanamap From: GoogleDevelopers Views: 6 0 ratings Time: 01:48 More in Science & Technology

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  • What should I aware of , when preparing a document of website for later maintenance use?

    - by user782104
    The development team has finished a website and my duty is to prepare a document so that other programmer can maintain the website with ease . As I am inexperience of that, I would like to ask what should be mentioned (document structure) in that report? So far my idea is only prepare a ERD diagarm for database and flow chart for each function. Any other suggestions, eg. what cookies stored ? Thanks

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  • Google+ Platform Office Hours (EMEA Edition): Devfest London & Hangouts

    Google+ Platform Office Hours (EMEA Edition): Devfest London & Hangouts For those who couldn't make it to this weekend's #devfestlondon at +Campus London, Google+ Platform Office Hours in Europe continues on Wednesday with a roundup of some of +Silvano Luciani, +Ian Barber and +Lee Denison's favourite moments from the event. +Silvano Luciani will be showing us how we too can Be +Paul Irish with the Hangout app he presented during the weekend, and we'll be talking about how to build Google Analytics into Hangout apps to make it easier to measure usage. From: GoogleDevelopers Views: 49 6 ratings Time: 19:29 More in Science & Technology

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  • Google I/O 2012 - Navigation in Android

    Google I/O 2012 - Navigation in Android Adam Powell, Richard Fulcher An app is useless if people can't find their way around it. Android introduced big navigation-support changes in 3.0 and 4.0. The Action Bar offers a convenient control for Up navigation, the Back key's behavior became more consistent within tasks, and the Recent Tasks UI got an overhaul. In this talk, we discuss how and why we got where we are today, how to think about navigation when designing your app's user experience, and how to write apps that offer effortless navigation in multiple Android versions. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 31 0 ratings Time: 01:01:53 More in Science & Technology

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  • Accounting for waves when doing planar reflections

    - by CloseReflector
    I've been studying Nvidia's examples from the SDK, in particular the Island11 project and I've found something curious about a piece of HLSL code which corrects the reflections up and down depending on the state of the wave's height. Naturally, after examining the brief paragraph of code: // calculating correction that shifts reflection up/down according to water wave Y position float4 projected_waveheight = mul(float4(input.positionWS.x,input.positionWS.y,input.positionWS.z,1),g_ModelViewProjectionMatrix); float waveheight_correction=-0.5*projected_waveheight.y/projected_waveheight.w; projected_waveheight = mul(float4(input.positionWS.x,-0.8,input.positionWS.z,1),g_ModelViewProjectionMatrix); waveheight_correction+=0.5*projected_waveheight.y/projected_waveheight.w; reflection_disturbance.y=max(-0.15,waveheight_correction+reflection_disturbance.y); My first guess was that it compensates for the planar reflection when it is subjected to vertical perturbation (the waves), shifting the reflected geometry to a point where is nothing and the water is just rendered as if there is nothing there or just the sky: Now, that's the sky reflecting where we should see the terrain's green/grey/yellowish reflection lerped with the water's baseline. My problem is now that I cannot really pinpoint what is the logic behind it. Projecting the actual world space position of a point of the wave/water geometry and then multiplying by -.5f, only to take another projection of the same point, this time with its y coordinate changed to -0.8 (why -0.8?). Clues in the code seem to indicate it was derived with trial and error because there is redundancy. For example, the author takes the negative half of the projected y coordinate (after the w divide): float waveheight_correction=-0.5*projected_waveheight.y/projected_waveheight.w; And then does the same for the second point (only positive, to get a difference of some sort, I presume) and combines them: waveheight_correction+=0.5*projected_waveheight.y/projected_waveheight.w; By removing the divide by 2, I see no difference in quality improvement (if someone cares to correct me, please do). The crux of it seems to be the difference in the projected y, why is that? This redundancy and the seemingly arbitrary selection of -.8f and -0.15f lead me to conclude that this might be a combination of heuristics/guess work. Is there a logical underpinning to this or is it just a desperate hack? Here is an exaggeration of the initial problem which the code fragment fixes, observe on the lowest tessellation level. Hopefully, it might spark an idea I'm missing. The -.8f might be a reference height from which to deduce how much to disturb the texture coordinate sampling the planarly reflected geometry render and -.15f might be the lower bound, a security measure.

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