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  • How to reduce UIImage size to a maximum as possible

    - by Tharindu Madushanka
    I am using following code to resize the image. Resize a UIImage Right Way And I use interpolation quality as kCGInterpolationLow. And then I use UIImageJPEGRepresentation(image,0.0) to get the NSData of that image. Still its a little bit high in size around 100kb. when I send it over the network. Can I reduce it further. If I am to reduce it more what could I do ? Thanks and Kind Regards,

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  • Good SMTP server on Windows for a production server

    - by Waleed Eissa
    I'm going to have my website hosted soon on a VPS or dedicated server (with Windows 2008), so I'm trying to plan ahead. I wonder whether the built-in SMTP server that comes with IIS7 is reliable enough for a production server or should I look for an alternative? I heard good things about hmailserver and best of all it's free, do you have any experience with using the bulit-in SMTP on a high traffic website. Thanks a lot for any suggestions

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  • How to determine values saved on the stack?

    - by Brian
    I'm doing some experimenting and would like to be able to see what is saved on the stack during a system call (the saved state of the user land process). According to http://lxr.linux.no/#linux+v2.6.30.1/arch/x86/kernel/entry_32.S it shows that the various values of registers are saved at those particular offsets to the stack pointer. Here is the code I have been trying to use to examine what is saved on the stack (this is in a custom system call I have created): asm("movl 0x1C(%esp), %ecx"); asm("movl %%ecx, %0" : "=r" (value)); where value is an unsigned long. As of right now, this value is not what is expected (it is showing a 0 is saved for the user value of ds). Am I correctly accessing the offset of the stack pointer? Another possibility might be could I use a debugger such as GDB to examine the stack contents while in the kernel? I don't have much extensive use with debugging and am not sure of how to debug code inside the kernel. Any help is much appreciated.

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  • Detecting I/O errors in a NON BLOCKING SOCKET

    - by ripunjay-tripathi-gmail-com
    I am writing a client - server system in which I used NON-BLOCKING sockets. My problem is to detect error { while performing send() or write() } that may occur while data transfer. Example lets say, while the data is being transferred the peer crashes. Another case there is some network problem, something like wire unplugged etc. As of now, I am using a high level ACK, that peer sends after receiving the complete data. Ripunjay Tripathi

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  • Does the order of columns matter in a group by clause?

    - by Jeff Meatball Yang
    If I have two columns, one with very high cardinality and one with very low cardinality (unique # of values), does it matter in which order I group by? Here's an example: select dimensionName, dimensionCategory, sum(someFact) from SomeFact f join SomeDim d on f.dimensionKey = d.dimensionKey group by d.dimensionName, -- large number of unique values d.dimensionCategory -- small number of unique values Are there situations where it matters?

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  • MongoDB query against geospatial index with maxDistance fails from node.js client

    - by user1735497
    I want to query against a geospatial index in mongo-db (designed after this tutorial http://www.mongodb.org/display/DOCS/Geospatial+Indexing). So when I execute this from the shell everything works fine: db.sellingpoints.find(( { location : { $near: [48.190120, 16.270895], $maxDistance: 7 / 111.2 } } ); but the same query from my nodejs application (using mongoskin or mongoose), won't return any results until i set the distance-value to a very high number (5690) db.collection('sellingpoints') .find({ location: { $near: [lat,lng], $maxDistance: distance / 111.2} }) .limit(limit) .toArray(callback); Has someone any idea how to fix that?

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  • ADO.NET Data Services for MySQL

    - by Shalan
    Hey! I've searched high and low for this, and no luck. Is there a way that CRUD methods for a MySQL install (Linux box) be exposed via ADO.NET WCF Data Services? I would really love to leverage this in my WPF app :) Thank u!

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  • Sorting a list of colors in one dimension?

    - by Ptah- Opener of the Mouth
    I would like to sort a one-dimensional list of colors so that colors that a typical human would perceive as "like" each other are near each other. Obviously this is a difficult or perhaps impossible problem to get "perfectly", since colors are typically described with three dimensions, but that doesn't mean that there aren't some sorting methods that look obviously more natural than others. For example, sorting by RGB doesn't work very well, as it will sort in the following order, for example: (1) R=254 G=0 B=0 (2) R=254 G=255 B=0 (3) R=255 G=0 B=0 (4) R=255 G=255 B=0 That is, it will alternate those colors red, yellow, red, yellow, with the two "reds" being essentially imperceivably different than each other, and the two yellows also being imperceivably different from each other. But sorting by HLS works much better, generally speaking, and I think HSL even better than that; with either, the reds will be next to each other, and the yellows will be next to each other. But HLS/HSL has some problems, too; things that people would perceive as "black" could be split far apart from each other, as could things that people would perceive as "white". Again, I understand that I pretty much have to accept that there will be some splits like this; I'm just wondering if anyone has found a better way than HLS/HSL. And I'm aware that "better" is somewhat arbitrary; I mean "more natural to a typical human". For example, a vague thought I've had, but have not yet tried, is perhaps "L is the most important thing if it is very high or very low", but otherwise it is the least important. Has anyone tried this? Has it worked well? What specifically did you decide "very low" and "very high" meant? And so on. Or has anyone found anything else that would improve upon HSL? I should also note that I am aware that I can define a space-filling curve through the cube of colors, and order them one-dimensionally as they would be encountered while travelling along that curve. That would eliminate perceived discontinuities. However, it's not really what I want; I want decent overall large-scale groupings more than I want perfect small-scale groupings. Thanks in advance for any help.

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  • Insert data into SQL server with best performance

    - by Incognito
    I have an application which intensively uses DB (SQL Server). As it must have high performance I would like to know the fastest way to insert record into DB.Fastest from the standpoint of execution time. What should I use ? As I know the fastest way is to create stored procedure and to call it from code (ADO.NET). Please let me know is there any better way or may be there are is some other practices to increase performance.

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  • Converting WAV to MP3 on Linux with low bitrates

    - by Olly
    I need to convert WAV files to MP3 files so they can be played on a website. I think that LAME would probably be the best tool. However the WAV files are low bitrate (around 8kbits recorded from a phone) and LAME's website states that it is the "best MP3 encoder at mid-high bitrates and at VBR". Is there is a better encoder for lower bitrates? If so can you define "better"?

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  • Cannot export a fusionchart with 'Embedding Charts Using <OBJECT>/<EMBED> Tags'

    - by zoom_pat277
    I am trying to export a fusion chart created using 'Embedding Charts Using / Tags'. Export works just perfect with the right click (on the chart) and chose a pdf to export. But I am not able to make this work via javascript. I have a button outside the chart which upon clicking calls the function below function myexport() { var object = getChartFromId('myChartid'); if( object.hasRendered() ) object.exportChart({exportFormat: 'PDF'}); } the object above returned is null and this fails on the next line here is the full prototype <html> <head> <title>My Chart</title> <script type="text/javascript" src="fusionCharts.debug.js"></script> <script type="text/javascript" src="fusionChartsExportComponent.js"></script> <script type="text/javascript"> function ExportMyChart() { var cObject = getChartFromId('Column3D'); if( cObject.hasRendered() ) cObject.exportChart({exportFormat: 'PDF'}); } </script> </head> <body> <object width="400" height="400" id="Column3D" classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0" > <param name="testname" value="Column3D.swf" /> <param name="FlashVars" value="&dataURL=testData.xml&chartWidth=400&chartHeight=300&DOMId=myChart1&registerWithJS=1&debugMode=0"> <param name="quality" value="high" /> <embed src="Column3D.swf" flashVars="&dataURL=testData.xml&chartWidth=400&chartHeight=300&DOMId=myChart1&registerWithJS=1&debugMode=0" width="400" height="300" name="Column3D" quality="high" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" /> </object> <!-- We also create a DIV to contain the FusionCharts client-side exporter component --> <div id="holderDiv" align="center">FusionCharts Export Handler Component</div> <script type="text/javascript"> var myExportComponent = new FusionChartsExportObject("testExporter1", "FCExporter.swf"); //Render the exporter SWF in our DIV fcexpDiv myExportComponent.Render("holderDiv"); </script> <input type="button" value="Export My Chart" onclick="ExportMyChart()" />

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  • Combining two UPDATE Commands - Performance ?

    - by Johannes
    If I want to update two rows in a MySQL table, using the following two command: UPDATE table SET Col = Value1 WHERE ID = ID1 UPDATE table SET Col = Value2 WHERE ID = ID2` I usually combine them into one command, so that I do not to have to contact the MySQL server twice from my C client: UPDATE table SET Col = IF( ID = ID1 , Value1 , Value2) WHERE ID=ID1 OR ID=ID2 Is this really a performance gain? Background Information: I am using a custom made fully C written high-performance heavily loaded webserver.

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  • How to shift pixels of a pixmap efficient in Qt4

    - by stanleyxu2005
    Hello, I have implemented a marquee text widget using Qt4. I painted the text content onto a pixmap first. And then paint a portion of this pixmap onto a paint device by calling painter.drawTiledPixmap(offsetX, offsetY, myPixmap) My Imagination is that, Qt will fill the whole marquee text rectangle with the content from myPixmap. Is there a ever faster way, to shift all existing content to left by 1px and than fill the newly exposed 1px wide and N-px high area with the content from myPixmap?

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  • Best of both worlds: browser and desktop game?

    - by Ricket
    When considering a platform for a game, I've decided on multi-platform (Win/Lin/Mac) but can't make up my mind as far as browser vs. desktop. As I'm not all too far in development, and now having second thoughts, I'd like your opinion! Browser-based games using Java applets: market penetration is reasonably high (for version 6, it's somewhere around 60% I believe?) using JOGL, 3D performance/quality is decent; certainly good enough to render the crappy 3D graphics that I make there's the (small?) possibility of porting something to Android great for an audience of gamers who switch computers often; can sit down at any computer, load a webpage and play it also great for casual gamers or less knowledgeable gamers who are quite happy with playing games in a browser but don't want to install more things to their computer written in a high-level language which I am more familiar with than C++ - but at the same time, I would like to improve my skills with C++ as it is probably where I am headed in the game industry once I get out of school... easier update process: reload the page. Desktop games using good ol' C++ and OpenGL 100% market penetration, assuming complete cross-platform; however, that number reduces when you consider how many people will go through downloading and installing an executable compared to just browsing to a webpage and hitting "yes" to a security warning. more trouble to maintain the cross-platform; but again, for learning purposes I would embrace the challenge and the knowledge I would gain better performance all around true full screen, whereas browser games often struggle with smooth full screen graphics (especially on Linux, in my experience) can take advantage of distribution platforms such as Steam more likely to be considered a "real" game, whereas browser and Java games are often dismissed as not being real games and therefore not played by "hardcore gamers" installer can be large; don't have to worry so much about download times Is there a way to have the best of both worlds? I love Java applets, but I also really like the reasons to write a desktop game. I don't want to constantly port everything between a Java applet project and a C++ project; that would be twice the work! Unity chose to write their own web player plugin. I don't like this, because I am one of the people that will not install their web player for anything, and I don't see myself being able to convince my audience to install a browser plugin. What are my options? Are there other examples out there besides Unity, of games that have browser and desktop versions? Did I leave out anything in the pro/con lists above?

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  • How to redirect an application's connection through a Socks5/SSH/HTTPS tunnel? Any recomendations of

    - by Pai Gaudêncio
    I need to tunnel the connections (mostly TCP) made by an application through Socks5, SSH or HTTPS. So far, I've found 3 ways to do this: api hooks, winsock lsp and a driver. I'm looking for advice on the best way to handle this, and any recommendations on SDK's that could abstract this task for me (free/open-source preferred, but commercial ones are welcome as long as the price is not high for a one-man-starting-company to afford). ps. I'm using .Net (C# and-or C++/CLI)

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  • Has the role of the Business Analyst become redundant on true Agile projects?

    - by Joanne
    On a truely agile project where the business is performing the role of the product owner, is there still a role for the Business Analyst? The product owner would do the functional testing as soon as the user story is developed and document and prioritise the user stories. In this case which I must add I haven't experienced yet and with high performing, self motivated developers I am struggling to see the role of the traditional business analyst?

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  • Does WCF use the ThreadPool to bring up new instances for a PerCall service?

    - by theburningmonk
    Hi, for a PerCall WCF service whose throttling has been set to be high (say, 200 max concurrent calls) would WCF bring up a new instance and invoke the request on a threadpool thread? If it does, then does this have an impact on the total number of concurrent calls allowed? I ask because I don't seem to ever hit the max number of concurrent calls I've set in the service throttling config but instead a fraction of that number - up to 50 on a 100 MaxConcurrentCalls setting and 160 on a 200 MaxConcurrentCalls setting. Thanks,

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  • Oracle : Identifying duplicates in a table without index

    - by user288031
    When I try to create a unique index on a large table, I get a unique contraint error. The unique index in this case is a composite key of 4 columns. Is there an efficient way to identify the duplicates other than : select col1, col2, col3, col4, count() from Table1 group by col1, col2, col3, col4 having count() 1 The explain plan above shows full table scan with extremely high cost, and just want to find if there is another way. Thanks !

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