Re: NSMutableString appendString: "appending self" allowed?

• Subject: Re: NSMutableString appendString: "appending self" allowed?
• From: Ali Ozer <email@hidden>
• Date: Thu, 30 Aug 2007 09:51:09 -0700
• Delivered-to: email@hidden
• Delivered-to: email@hidden

Ali

On Aug 29, 2007, at 21:46 , Manfred Schwind wrote:

Hi,

is the following call allowed?

[someMutableString appendString:someMutableString];

It effectively appends a given string to itself, so that it gets doubled. (E.g. "Oh" will become "OhOh" etc.)

It works at least on 10.4.10, but it's not documented wether I can use the receiver as parameter in the appendString selector for NSMutableString. Can someone (maybe from Apple) approve that this works also for older system versions?
I can think of strange side effects when appending a string to itself, depending on the internal implementation.

Or should I better use this:

[someMutableString appendString:[[someMutableString copy] autorelease]];

or

[someMutableString appendString:[someMutableString subStringToIndex: [someMutableString length]]];

or something like that?

Regards,
Mani
--
http://www.mani.de
iVolume - Loudness adjustment for iTunes.
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