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NSNumberFormatter, NSDecimalNumber and Scientific Notation
-(void)setScientificNotationForTextField:(UITextField*)tf Text:(NSString*)text {

NSString* textBefore = text;

// use scientific notation, i.e. NSNumberFormatterScientificStyle
NSNumberFormatter* formatter = [[NSNumberFormatter alloc] init];
//[formatter setGeneratesDecimalNumbers:YES];
[formatter setNumberStyle:NSNumberFormatterScientificStyle];
NSDecimalNumber* number = (NSDecimalNumber*)[formatter numberFromString:text];
tf.text = [number descriptionWithLocale:[[Utilities sharedUtilities] USLocale]];

NSString* textAfter = tf.text;
// DEBUG
NSLog(@"setScientificNotation | text before = %@, text after = %@", textBefore, textAfter);

[formatter release];
}

NSDecimalNumber* number = [NSDecimalNumber decimalNumberWithString:text];