Re: Reversing a String
Re: Reversing a String
- Subject: Re: Reversing a String
- From: "Adam R. Maxwell" <email@hidden>
- Date: Tue, 30 Dec 2008 21:59:00 -0800
On Dec 31, 2008, at 4:23 PM, Ron Fleckner wrote:
const int stringLength = [aString length];
char reverseChars[stringLength];
for (i = stringLength - 1, j = 0; i >= 0; i--, j++)
{
char c = [aString characterAtIndex:i];
reverseChars[j] = c;
}
Unfortunately, this is not correct; -[NSString characterAtIndex:]
returns a unichar, which is not a char. In addition, it will give odd
results for composed characters. Depending on what you want, you
might be able to use rangeOfComposedCharacterAtIndex:.
I'd also use NSMutableString instead of a stack buffer of chars, since
this looks like a buffer overflow (unless I'm missing something):
reverseChars[j] = '\0';// create a C (UTF8) string by adding a null
char
--
Adam
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