2014/10/15 下午 10:16:10

iphone Programming Glossary: zeros

http://stackoverflow.com/questions/11520815/nscache-is-not-evicting-data

low memory situations or I am doing something wrong void viewDidLoad _testCache NSCache alloc init Allocate 600 MB of zeros and save to NSCache NSMutableData largeData NSMutableData alloc init largeData setLength 1024 1024 600 _testCache setObject..

how to add echo effect on audio file using objective-c

http://stackoverflow.com/questions/11793310/how-to-add-echo-effect-on-audio-file-using-objective-c

float x buffer writeIndex x writeIndex if writeIndex LENGTH writeIndex 0 Don't forget to initialize the buffer to all zeros. So that's your delay line. Basic usage would be this float singleDelay float x delayLine.writeNext x return delayLine.readNext..

UIPickerView: last value followed by first value

http://stackoverflow.com/questions/1291426/uipickerview-last-value-followed-by-first-value

NSInteger component usually return pickerData count return kRowsInPicker 10 000 is good if you add a few more zeros there seems to be problems. #pragma mark #pragma mark UIPickerViewDelegate methods NSString pickerView UIPickerView pickerView..

adjust corners and crop the image openCV

http://stackoverflow.com/questions/13098073/adjust-corners-and-crop-the-image-opencv

contours findContours img1 contours CV_RETR_EXTERNAL CV_CHAIN_APPROX_NONE you could also reuse img1 here Mat mask Mat zeros img1.rows img1.cols CV_8UC1 CV_FILLED fills the connected components found drawContours mask contours 1 Scalar 255 CV_FILLED..

How to reduce the size of an sqlite3 database for iphone?

http://stackoverflow.com/questions/401467/how-to-reduce-the-size-of-an-sqlite3-database-for-iphone

to encode the letter frequencies more efficiently e.g. binary encode them as a blob perhaps with RLE as there are many zeros . Any ideas for how best to achieve this or other ideas to reduce the size I am building the DB in ruby and reading it on..

Limit a double to two decimal places without trailing zeros

http://stackoverflow.com/questions/4026135/limit-a-double-to-two-decimal-places-without-trailing-zeros

a double to two decimal places without trailing zeros I read this and that . I want this exactly 1.4324 1.43 9.4000 9.4 43.000 43 9.4 9.40 wrong 43.000 43.00 wrong In both questions..

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

input signal something like ySmoothedNew ySmoothedLast 0.9 newY 0.1 ySmoothedLast ySmoothedNew then calculating zeros. of course I expect each wave to comprise several crossings but provided each wave contains the same number of crossings..

How To Populate UIPicker with Current Day of week + Date,

http://stackoverflow.com/questions/4611431/how-to-populate-uipicker-with-current-day-of-week-date

r if lastChar isEqual @ 0 TRUE replace it with nothing else not a zero at the end so we are good to remove all zeros currentDay currentDay stringByReplacingOccurrencesOfString @ 0 withString @ used later for date formatting NSUInteger count2..

implemeting a text field input like an atm machines input

http://stackoverflow.com/questions/5042901/implemeting-a-text-field-input-like-an-atm-machines-input

happy with the details in this other SO post describing how to use NSNumberFormatter to display leading and trailing zeros. Pulled and tweaked from that post NSNumberFormatter formatter NSNumberFormatter alloc init formatter setNumberStyle NSNumberFormatterDecimalStyle..

iOS5 show numeric keypad by default without using type=“number” or type=“tel”

http://stackoverflow.com/questions/8222528/ios5-show-numeric-keypad-by-default-without-using-type-number-or-type-tel

is causing some issues see this question below which sums it up Input type 'number' new validation removes leading zeros and formats number in Safari for iPhone iOS5 and latest Safari for Mac Although input type tel works to bring up a numeric..

Padding string to left with objective c

http://stackoverflow.com/questions/964322/padding-string-to-left-with-objective-c

appreciated. objective c iphone xcode share improve this question NSString formatValue int value forDigits int zeros NSString format NSString stringWithFormat @ 0 dd zeros return NSString stringWithFormat format value share improve this..