I have an NSString that I modify several times (eg. trim, replace occurrences of string etc.). Is it assumed that I will end up with the exact number of autoreleased strings that is equal to the number of modifications? What if I use a huge string? Is there a better solution?

AGRegex regex = [[AGRegex alloc] initWithPattern:@”\<[a-zA-Z0-9="_ /]\>” options:AGRegexCaseInsensitive]; NSString *result=[regex replaceWithString:@” “ inString:testString]; [regex release]; regex=[[AGRegex alloc] initWithPattern:@” +” options:AGRegexCaseInsensitive]; result=[regex replaceWithString:@” “ inString:result]; [regex release]; result=[result stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

Will this code above produce memory leaks? (I think it won’t)

---

It won’t. You release regex for each alloc, and everything else is autoreleased (or should be). You might want to use a temp string in line 4, rather than altering result in place, but that’s mostly a style thing. Or make result a mutable string. I think AGRegex has NSMutableString category methods.