Re: Efficiently getting characters
Re: Efficiently getting characters
- Subject: Re: Efficiently getting characters
- From: Antonio Nunes <email@hidden>
- Date: Wed, 3 May 2006 10:31:03 +0100
On 3 May 2006, at 00:01, Douglas Davidson wrote:
This note is intended for those who are writing subclasses of
NSString. If you are not writing a subclass of NSString, you
should ignore it. If you are not writing a subclass of NSString,
you are not using the abstract implementation of
getCharacters:range:. Instead, you are using an efficient
implementation supplied by one of the standard concrete subclasses.
Maybe then it would gain clarity by being be rephrased thus:
The abstract implementation of this method uses characterAtIndex:
repeatedly,
correctly extracting the characters, though very
inefficiently. If you are writing a subclass you should
override it to provide a fast implementation.
António _______________________________________________
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