Comments on: List Manipulation in Java and Ruby

By: Julian Doherty

Julian Doherty — Wed, 02 May 2007 21:17:00 +0000

anon - that would work if we wanted to find the minimum Foo object, but this example is looking for the earliest start_date on a foo object.

The mapping step is the hard part to do in Java.

Anonymous — Wed, 02 May 2007 18:20:00 +0000

Or in Java:

startFoo = Collections.min(getFoos);

Julian Doherty — Tue, 01 May 2007 03:40:00 +0000

Yes, of course
Nice. Cheers robert.
*slaps head at how obvious it is*

It’s too easy for someone dumb like me to miss the simpler approach when doing a literal translation like that.

Robert — Fri, 27 Apr 2007 07:56:00 +0000

The difference is more striking if you use the built-in function min instead of custom injection:

get_foos.map{|f| f.start_date}.min

That’s all you need!