comma separated numbers

        NSLocale *indiaLocale = [[[NSLocale alloc] initWithLocaleIdentifier:@"en_IN"] autorelease];

        double currency = 1000000000.00; 

        NSNumberFormatter *numberFormatter = [[[NSNumberFormatter alloc] init] autorelease];

        [numberFormatter setNumberStyle: NSNumberFormatterCurrencyStyle];

        [numberFormatter setLocale:indiaLocale];

        

        NSString *numberAsString = [numberFormatter stringFromNumber:[NSNumber numberWithInt:currency]];

        NSString *str2 = [NSString stringWithFormat:@"Converted:%@",numberAsString]; 

        

        NSLog(@"String:%@",str2);

Concatenate two strings in objective - C

NSString *hello = @"Hello";
NSString *world = @"World";
NSString *helloWorld = [hello stringByAppendingString:world];

set labels size as per string in iphone

-(float)getHeightByWidth:(NSString*)myString:(UIFont*)mySize:(int)myWidth

 {
  CGSize boundingSize = CGSizeMake(myWidth, CGFLOAT_MAX);
  CGSize requiredSize = [myString sizeWithFont:mySize constrainedToSize:boundingSize lineBreakMode:UILineBreakModeWordWrap];  
  return requiredSize.height;
 }

Remove .DS_Store & git File using Terminal

To Remove .DS_Store File:-

cd <ur path> 

find . -name '*.DS_Store' -type f -delete

To Remove Git File:-

cd <ur path> 

find . -name '*.git' -type f -delete

Remove .DS store Files from Document Directory

//clean documnt directory

NSString *folderPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]; 

NSError *error = nil;

NSMutableArray *dirArr = [NSMutableArray arrayWithArray:[[NSFileManager defaultManager] contentsOfDirectoryAtPath:folderPath error:&error]];

[dirArr removeObject:@".DS_Store"];

for (NSString *file in [[NSFileManager defaultManager] contentsOfDirectoryAtPath:folderPath error:&error]) 

{

     [[NSFileManager defaultManager] removeItemAtPath:[folderPath stringByAppendingPathComponent:file] error:&error];

}