Re: [sc-users] detect / detectIndex

[Julian Rohrhuber <rohrhuber@xxxxxxxxxxxxxx>]

> Will there ever be a parallel to detect and detectIndex that will 
> start at a user-supplied index? Any reason the current methods 
> couldn't be modified to do this?
>
> It's a pain... if I want to start at the beginning of a collection, 
> fine, but otherwise I have to write the while loop myself. Waste of 
> effort.
> hjh


I'd also suggest to always hand in a starting index, like in Order-detect
but this cannot be implemented in Collection (as Collection is not 
indexeable necessarily.) So SequenceableCollection-detect should 
probably be:


+SequenceableCollection {
	detect { | function, offset=0 |
			var size, elem;
			size = this.size;
			while {
				offset < size
			} {
				elem = this[offset];
				if (function.value(elem, offset)) { ^elem };
				offset = offset + 1
			};
			^nil
	}

	detectIndex { | function, offset=0 |
			var size, elem;
			size = this.size;
			while {
				offset < size
			} {
				elem = this[offset];
				if (function.value(elem, offset)) { ^offset };
				offset = offset + 1
			};
			^nil
		}
}
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