This post originated from an RSS feed registered with Agile Buzz by James Robertson. Original Post: More on Smalltalk Productivity Feed Title: Cincom Smalltalk Blog - Smalltalk with Rants Feed URL: http://www.cincomsmalltalk.com/rssBlog/rssBlogView.xml Feed Description: James Robertson comments on Cincom Smalltalk, the Smalltalk development community, and IT trends and issues in general. Latest Agile Buzz Posts Latest Agile Buzz Posts by James Robertson Latest Posts From Cincom Smalltalk Blog - Smalltalk with Rants

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...