More on Smalltalk Productivity

Along the lines of this post, a reader submits this example:

Problem: I have a list of objects. I want to create another list containing the 'id' property of those objects.

Solutions:

Ruby

     list.map { |i| i.id }

Java

     List ids = new ArrayList();
	for (Iterator i = list.iterator(); i.hasNext(); ) 
		{    
			ids.add(new Long(((Thingy)i.next()).getId()));
		}

Java w/ 1.5-style Generics and For Loop

     List ids = new ArrayList();
	for (Thingy x :list) 
		{    ids.add(new Long(x.getId()));
		}



And the Smalltalk for that:

list collect: [[:each | each id]


I think that all speaks for itself...

Yes, it certainly does. Just in sheer time at the keyboard, Java loses...