Every assignment will release the old one,so no leak.
From My iPhone
在 2012-10-29，下午7:34，Mike Abdullah <cocoa...@mikeabdullah.net> 写道：
>
> On 29 Oct 2012, at 10:06, Vincent Habchi <vi...@macports.org> wrote:
>
>> Hi folks,
>>
>> before aught else, all my thoughts to those of you in the Eastern coast that
>> are preparing themselves for a bunch of bleak days…
>>
>> I’ve just a silly question (I know, I don’t post very often and I apologize
>> for that): I need to convert a HTML style string, with “& escapes” to normal
>> UTF-8. So I wrote this:
>>
>> -(NSString *)convertHTMLtoUTF8:(NSString *)aString {
>>
>> NSString * convertedString = [aString copy];
>> for (NSString * pattern in [HTMLtoUTF keyEnumerator]) {
>> convertedString = [convertedString
>> stringByReplacingOccurrencesOfString:pattern
>> withString:HTMLtoUTF [pattern]];
>> }
>>
>> return convertedString;
>> }
>>
>> where HTMLtoUTF is a dictionary of pairs {@"&…;" :
>> @"<corresponding_UTF8_char>"}.
>>
>> Now, my question is: is that scheme going to work correctly with ARC? Is it
>> not going to leak each intermediate version of ‘convertedString’?
>
> The code is a fairly inefficient to start with, but no, it's not going to
> leak.
>
>
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