RE: counting characters
RE: counting characters
- Subject: RE: counting characters
- From: "Jonathan E. Jackel" <email@hidden>
- Date: Thu, 15 Apr 2004 16:24:51 -0400
>
On 15. Apr 2004, at 20:09, Jonathan E. Jackel wrote:
>
>
> Of course, you can put your code in a category on NSString call it the
>
> Cocoa
>
> way:
>
>
>
> int occurrences = [theString numberOfOccurrences:searchString];
>
>
Unfortunately if we need to count the characters in an
>
NSAttributedString instead (or perhaps count objects in an NSArray)
>
then we cannot re-use your implementation, which we can with
>
std::count.
Is there something wrong with [[theAttributedString string]
numberOfOccurrences:searchString]?
If your point is that you can't hand an arbitrary object to the method and
count stuff, yes, that's true. So what? We have a -count method for arrays
and a -length method for strings and people don't complain about that.
Doesn't seem like that big a deal to me, at least in this instance.
If it's important to deal with multiple kinds of objects (which the original
poster did not mention as a requirement), you can create a generic method
that tests self for -isKindOfClass: or -respondsToSelector: and put it in a
category on NSObject. You don't HAVE to resort to CocoaSTL to be able to
reuse your code, although I can see why that might be useful.
Jonathan
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