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2014/10/15 ¤U¤È 10:03:33
iphone Programming Glossary: algorithmsIs there any zip decompression for iPhone? http://stackoverflow.com/questions/1230351/is-there-any-zip-decompression-for-iphone there any zip decompression for iPhone I found the zlib and gzip decompression algorithms but I need to compress a whole directory and download it from the server. Would rather not go file at a time. Thanks. iphone..
How to implement Blowfish algorithm in iOS http://stackoverflow.com/questions/13507384/how-to-implement-blowfish-algorithm-in-ios
Do you know a good and efficient FFT? [closed] http://stackoverflow.com/questions/1592345/do-you-know-a-good-and-efficient-fft your data to power of 2 lengths then many libraries will offer reasonable performance. Check out this list of FFT algorithms that FFTW used for comparison many are free and some may be adequate. I'd probably start with good old numerical recipes..
Fastest cross-platform A* implementation? http://stackoverflow.com/questions/2107601/fastest-cross-platform-a-implementation is better suited or that the fastest implementations are not fast enough. I appreciate the suggestions of alternative algorithms however the question is not Should I roll my own A Joel on Software Not Invented Here Syndrome Coding Horror Don't Reinvent.. the Not Invented Here Syndrome c iphone algorithm a star share improve this question Look at other path finding algorithms like Breath First Depth First Minimax Negmax etc. and weigh the positives and negatives for your scenario. Boost also has..
Does my application “contain encryption”? http://stackoverflow.com/questions/2135081/does-my-application-contain-encryption and Reporting ERN process If your app uses accesses implements or incorporates industry standard encryption algorithms for purposes other than those listed as exemptions under question 2 you need to submit for an ERN authorization . Examples.. curve iv your app is a mass market product with key lengths not exceeding 64 bits symmetric or if no symmetric algorithms not exceeding 768 bits asymmetric and or 128 bits elliptic curve. Please review Note 3 in Category 5 Part 2 to understand..
How i count red color pixel from the UIImage using objective-C in iphone? http://stackoverflow.com/questions/2342327/how-i-count-red-color-pixel-from-the-uiimage-using-objective-c-in-iphone UIImage and then counts the number of pure red pixels. It is an example and you can use it and modify it for your own algorithms Structure to keep one pixel in RRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA format struct pixel unsigned char r g b a Process the image..
http://stackoverflow.com/questions/2394236/objective-c-and-android the components are different. In the end what you might be able to share is data object classes possibly some algorithms. It's not even like you could realistically end up sharing network code as in the old days because you aren't directly using..
How to encrypt an NSString in Objective C with DES in ECB-Mode? http://stackoverflow.com/questions/2512184/how-to-encrypt-an-nsstring-in-objective-c-with-des-in-ecb-mode
How to do a natural sort on an NSArray? http://stackoverflow.com/questions/2846301/how-to-do-a-natural-sort-on-an-nsarray the NSArray sorting functionality to get this natural sorting as opposed to the alphabetical sort I found some generic algorithms but I was hoping for something built in... iphone objective c cocoa sorting share improve this question NSString s..
Determining the magnitude of a certain frequency on the iPhone http://stackoverflow.com/questions/2921674/determining-the-magnitude-of-a-certain-frequency-on-the-iphone the output samples instead of calculating just the output samples you need using the DFT. The reason is that most FFT algorithms are heavily optimized so even though you may be theoretically doing less work it may take longer than the FFT. You would..
Practical rules for premature optimization [closed] http://stackoverflow.com/questions/2978460/practical-rules-for-premature-optimization to disciplined computer science. But it has occurred to me that maybe considering the complexity and performance of algorithms is going the way of assembly loop unrolling and other optimization techniques that are now considered unnecessary. What..
C/C++/Obj-C Real-time algorithm to ascertain Note (not Pitch) from Vocal Input http://stackoverflow.com/questions/4062099/c-c-obj-c-real-time-algorithm-to-ascertain-note-not-pitch-from-vocal-input are also plenty of academic papers on the subject of pitch estimation. There is another long list of pitch estimation algorithms here . Edited addition Apple's SpeakHere and aurioTouch sample apps available from their iOS dev center contain example..
iphone - core motion range of yaw, pitch and roll http://stackoverflow.com/questions/5004548/iphone-core-motion-range-of-yaw-pitch-and-roll display is tilting upward away from gravity and positive if the display is facing down toward gravity Note that the algorithms used by CMDeviceMotion are pretty good at separating gravity from user acceleration but under certain kinds of motion there..
What h.264 format loads on android AND IOS? http://stackoverflow.com/questions/6364190/what-h-264-format-loads-on-android-and-ios CABAC bf 0 Turns off B frames not supported on Android or other h.264 Baseline Profile devices subq 6 Determines what algorithms are used for subpixel motion searching. 7 applies to B frames not supported on Android. refs 5 Determines how many frames..
http://stackoverflow.com/questions/6604356/ios-icon-jiggle-algorithm home screen when you tap and hold on them on both the iPhone and iPad. I've searched the Internet and have found a few algorithms but they just cause the view to rock back and forth which is not at all like the Apple jiggle. It seems there is some randomness..
FFT on iPhone to ignore background noise and find lower pitches http://stackoverflow.com/questions/7181630/fft-on-iphone-to-ignore-background-noise-and-find-lower-pitches functions. I'm also not sure how to improve the accuracy of the code in the lower frequencies. There seem to be other algorithms to determine the dominant frequency but again looking for a kick in the right direction when using the data returned by.. autocorrelation methods AMDF ASDF Cepstrum Cepstral analysis harmonic product spectrum phase vocoder and or composite algorithms such as RAPT Robust Algorithm for Pitch Tracking and YAAPT. An FFT is useful as only a sub part of some of the above methods...
iPhone - Moving a CLLocation by x meters http://stackoverflow.com/questions/7278094/iphone-moving-a-cllocation-by-x-meters double lon1 double distanceMeters double bearing double lat2 double lon2 If you can't use that take a look at the algorithms that it was derived from here and here and perhaps you can modify it or those sites might have something closer to your..
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