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  • Effect of 'myObj = [[[[MyClass alloc] init] autorelease] retain];'?

    - by filipe
    I've just downloaded the Facebook iOS SDK and I noticed that in the sample code that comes with the SDK whenever it creates an instance of the Facebook class it does it like this: _facebook = [[[[Facebook alloc] init] autorelease] retain]; where _facebook is a member variable of the calling object (i.e. not a local variable). Can anyone explain exactly what's the point of autoreleasing and then retaining it?

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  • How to calculate required switch speed based on network usage?

    - by tobefound
    I have a 48 port HP Procurve Switch 2610 (J9088A) that can handle 13.0 million PPS (packets per second) and features wire speed switching capacity at 17.6Gbps. First off, what does that REALLY mean? Where do I start when trying to figure out if my office (with 70 employees) will be well setup with this switch? How to calculate through-put based on a user average load of X MB per day? 90% of the folks will only be sending email, access random websites, etc... the other 10% will be conducting heavier tasks like moving image files (10 MB) across network shares, constant external FTP streams through the switch to a server etc... Is this switch good enough?

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  • GetIDsOfNames implementation

    - by fearlesscoder
    Hi all, I need to implement GetIDsOfNames in my C++ application and I have no idea how to do that. I understand that I should implement GetTypeInfo, GetTypeInfoCount for that. I found a code sample which uses LIBID, but I don't have LIBID, and I don't know where to get one. What I really need is a good explanation of IDispatch interface internals...

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  • MySQL 5.1 - logging CREATE/ALTER statements

    - by pako
    Is it possible to log CREATE / ALTER statements issued on a MySQL server? I heard that it could be done with a trigger, but I can't seem to find suitable code anywhere. I would like to log these statements to a table, preferably with the timestamp of when they were issued. Can someone provide me with a sample trigger that would enable me to accomplish this? I would like to log these statements so I can easily synchronize the changes with another MySQL server.

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  • Efficient way in Python to remove an element from a comma-separated string

    - by ensnare
    I'm looking for the most efficient way to add an element to a comma-separated string while maintaining alphabetical order for the words: For example: string = 'Apples, Bananas, Grapes, Oranges' subtraction = 'Bananas' result = 'Apples, Grapes, Oranges' Also, a way to do this but while maintaining IDs: string = '1:Apples, 4:Bananas, 6:Grapes, 23:Oranges' subtraction = '4:Bananas' result = '1:Apples, 6:Grapes, 23:Oranges' Sample code is greatly appreciated. Thank you so much.

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  • Merging and sorting multiple files with "sort"

    - by NewbiZ
    Hello, I have a bunch of text logfiles in the following format: ID (17 characters) Timestamp (14 characters YYYYmmddHHMMSS e.g. "20060210100040" -> 2006/02/10 10:00:40) Random data (? characters) end of line The files are already sorted by timestamp. I need to get 1 log file with all the logs from multiple logs files, sorted by timestamp. Note that the log files are really huge, around 3-4G each (and there are dozens of them) I tried the following command: sort -s -m -t '|' -k1n,1n +17 -o data_sort.txt *.TXT Here is how I ended up with this command: -s : don't bother with tie results -m : merge all logs files -t '|' : there is no | in my logs, so the whole line should be field 1 -k1n,1n: sort on the first field as a numeric value +17 : the timestamp starts at index 17 -o : output file Actually... it fails miserably. The output file data_sort.txt is just the concatenation of all files, not sorted at all :( I would greatly appreciate if anyone could provide any help on this problem! Thanks

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  • Reverse engineering a bezier curve

    - by Martin
    Given a few sample points on a bézier curve, is it possible to work out the set of possible parameters of the curve? In my specific application there is a limited set of endpoints the curve may have, so I want to generate the set of possible curves, enumerate all of them and pick out all the ones which may end on a valid end point.

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  • how to enter manual time stamp in get date ()

    - by Arunachalam
    how to enter manual time stamp in get date () ? select conver(varchar(10),getdate(),120) returns 2010-06-07 now i want to enter my own time stamp in this like 2010-06-07 10.00.00.000 i m using this in select * from sample table where time_stamp ='2010-06-07 10.00.00.000' since i m trying to automate this query i need the current date but i need different time stamp can it be done .

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  • Are some .ogv/.ogv files possible to be corrupted, to make it not possible to loop?

    - by C15R
    I discovered by trial and error that my one .ogv video will not loop, but if I interchange a random .ogv video from wikipedia that one does loop, and they are both called .ogv. Why is this? Is the not-looping file corrupted? EDIT! I just had a breakthrough! I discovered if I view the webpage using my computer's version of the file (not-uploaded version), then it does loop! (I open index.html on my computer, and it is a relative URL) But! The version which is uploaded onto my web server does not loop. (I changed the relative URL to an absolute URL which points to the file on my server. I tried re-uploading it, but still does not loop. If someone has an answer to why this is and how I can fix it, I will be very grateful!

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  • Task queue java api

    - by user268515
    Hi i'm working in task queue concept.... First i struggled to program using task queue and i asked many doubts in stack overflow and Google app engine java. After a search i got a sample program for task queue. http://gaejexperiments.wordpress.com/2009/11/24/episode-10-using-the-task-queue-service/ It will very useful for beginners Like me. Regards, Sharun.

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  • Linux web server shared hosting file errors

    - by dfilkovi
    I'm using a shared hosting to host my website and have some problems with files from time to time. First, one of my file (php) was missing a part of code (nothing to do with hackers just a random piece of code was missing), then after some time a value inside a mysql table was also missing a part, then a whole table column disappeared, after that a whole file on my site disappeared and lastly again some code from a file disappeared, my hosting service says it has nothing to do with them, but this is stupid, how can this happen, no hacker attack could do such a thing, I believe it's some kind of a disk corruption or bad backup. Anyone have any ideas?

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  • In Opera 11, how can I set up shortcuts to switch to specific tabs?

    - by gphilip
    In Firefox on Linux, we can use Alt+1, Alt+2, etc. to switch to the first, second, etc. tabs, till the 9th tab. This is very useful to switch between tabs. In Opera 11 on Linux, I couldn't find a way to do this: the only way to switch among tabs seems to be to use Ctrl+Tab and then cycle till we reach the tab that we want. Needless to say, this "linear access" method is slower (and more annoying) than the random access available in FF. So my question is: How can I set up shortcuts in Opera 11 on Linux so that I can switch to one of the first nine tabs using a numbered shortcut?

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  • Mixing two wav music files of different size

    - by iphoneDev
    Hi, I want to mix audio files of different size into a one single .wav file. There is a sample through which we can mix files of same size [(http://www.modejong.com/iOS/#ex4 )(Example 4)]. I modified the code to get the mixed file as a .wav file. But I am not able to understand that how to modify this code for unequal sized files. If someone can help me out with some code snippet,i'll be really thankful.

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  • How do you load a view on top of another view in the iPad

    - by Magician Software
    How do you load a view on top of another view in the iPad like in the wordpress app when it asks you to setup your blog. Can you show or post me some sample code. I have an NSUSerdefaults setup so it will display this on the first launch. I would like this view to look like this http://uplr.me/files/p45064.png See how it has the shaddows and the view is darkened in the back. Thats what I am trying to do.

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  • Flash object wont load inside the application but loads in separated file.

    - by Taverneiro
    I have a Flash object that loads fine in a static sample HTML but doesnt inside the application. I saw something interesting in firebug. When the page loads the object is loaded two times. In the first one I get a Partial Response status but the content-type of the package is right. In the second time the whole package is transfered but the content-type is wrong! I am using apache 2.2.14.

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  • Simple Iphone XML Example

    - by dub
    Hi, I a bit overwhelmed with all of the sample code I've seen on the apple dev site. I'm looking for a simple example to show me how to load an xml file from a server into iphone. I would like to read url's from this xml file and load an image.

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  • Use OpenGL ES to create an iPhone painting tool?

    - by Jeff
    Is it feasible to use OpenGL ES to create an iPhone raster graphics editor like SketchBook Mobile(http://usa.autodesk.com/adsk/servlet/pc/item?siteID=123112&id=13872203)? Any related reference(tutorial, sample) you can recommend? Why I try to use OpenGL ES? Because it's hardware accelerated and cross-platform. Thanks in advance!

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