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Why historically do people use 255 not 256 for database field magnitudes?
...nagement likes powers of 2. see: stackoverflow.com/questions/3190146/… Allocating char foo[257] will either fragment memory or take up 512 bytes.
– ebyrob
Jan 26 '17 at 17:11
4...
How to check if an NSDictionary or NSMutableDictionary contains a key?
...to a doesContain.
NSMutableDictionary* keysByName = [[NSMutableDictionary alloc] init];
keysByName[@"fred"] = @1;
NSString* test = @"fred";
if ([keysByName objectForKey:test] != nil)
NSLog(@"\nit works for key lookups"); // OK
else
NSLog(@"\nsod it");
if (keysByName[test] != nil)
NSL...
Convert between UIImage and Base64 string
...)decodeBase64ToImage:(NSString *)strEncodeData {
NSData *data = [[NSData alloc]initWithBase64EncodedString:strEncodeData options:NSDataBase64DecodingIgnoreUnknownCharacters];
return [UIImage imageWithData:data];
}
iOS 6.1 and < version
First Option : Use this link to encode and decode image...
How do I make a UITableViewCell appear disabled?
...:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
// Configure the cell...
if(indexPath.row==0)
{
cell.userInteractionEnabled=FALSE;
UIImageVi...
Java dynamic array sizes?
...
No you can't change the size of an array once created. You either have to allocate it bigger than you think you'll need or accept the overhead of having to reallocate it needs to grow in size. When it does you'll have to allocate a new one and copy the data from the old to the new:
int[] oldItems ...
Label Alignment in iOS 6 - UITextAlignment deprecated
...fine ALIGN_CENTER UITextAlignmentCenter
#endif
UILabel* label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 50, 30)];
label.text = @"There is no spoon";
label.textAlignment = ALIGN_CENTER;
[self addSubview:label];
shar...
How do you crash a JVM?
... as blowing the stack via recursion, running out of heap memory via object allocations, or simply throwing RuntimeException. But this just causes the JRE to exit with a StackOverflowError or similar exception, which, again is not really a crash.
So what's left? I'd really love to hear what the auth...
How to convert NSDate into unix timestamp iphone sdk?
...TimeStamp
{
NSDateFormatter *objDateformat = [[NSDateFormatter alloc] init];
[objDateformat setDateFormat:@"yyyy-MM-dd"];
NSString *strTime = [objDateformat stringFromDate:[NSDate date]];
NSString *strUTCTime = [self GetUTCDateTimeFromLocalTime:strTime];//Yo...
How can I concatenate NSAttributedStrings?
...
NSMutableAttributedString *mutableAttString = [[NSMutableAttributedString alloc] init];
NSString *plainString = // ...
NSDictionary *attributes = // ... a dictionary with your attributes.
NSAttributedString *newAttString = [[NSAttributedString alloc] initWithString:plainString attributes:attribute...
Super slow lag/delay on initial keyboard animation of UITextField
...n initial keyboard appearance.
UITextField *lagFreeField = [[UITextField alloc] init];
[self.window addSubview:lagFreeField];
[lagFreeField becomeFirstResponder];
[lagFreeField resignFirstResponder];
[lagFreeField removeFromSuperview];
}
...