On Wed, Aug 6, 2008 at 7:41 AM, Negm-Awad Amin <[EMAIL PROTECTED]>wrote:
>
> Am Mi,06.08.2008 um 16:27 schrieb Wayne Shao:
>
> Hi
>
> Please see the question in the comments of the following code.
>
> NSMutableDictionary* aDictionary = (initialized with some objects)
>
> for (id theKey in aDictionary) {
> id anObject = [[aDictionary objectForKey:theKey] retain];
>
> [aDictionary removeObjectForKey:theKey];
> // Question: will this removal break or corrupt the loop of enumerating the
> elements?
>
> [anObject someMessage];
> }
>
> in java, Iterators allow the caller to remove elements from the underlying
> collection during the iteration. is there similar semantics in objective-c?
>
>
> http://developer.apple.com/documentation/Cocoa/Conceptual/ObjectiveC/Articles/chapter_8_section_1.html#/
> /apple_ref/doc/uid/TP30001163-CH18-SW1
>
> Enumeration is "safe"—the enumerator has a mutation guard so that *if you
> a**ttempt to modify the collection during enumeration, an exception is
> raised*.
>
Oh. thanks for the info. Is there an alternative method to remove during a
loop? (besides the option to remove elements outside of the loop).
>
> Amin
>
> BTW: This looks like a memory leak …
>
fixed?
for (id theKey in aDictionary) {
id anObject = [[aDictionary objectForKey:theKey] retain];
[aDictionary removeObjectForKey:theKey];
// Question: will this removal break or corrupt the loop of enumerating the
elements?
[anObject someMessage];
[anObject release];
}
>
>
> --
> Wayne Shao
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>
>
> Amin Negm-Awad
> [EMAIL PROTECTED]
>
>
>
>
>
--
Wayne Shao
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