From: "Peña, Botp" <botp@...>
Date: 2008-10-13T12:43:26+09:00
Subject: Re: Sorting help

From: Binh Ly [mailto:binh@pigbaby.net] 
# Given an array with values like this ["10.1", "7.4", "10.9", "10.11",
# "10.10"]
# when I sort it i get something like ["10.1", "10.10", "10.11", "10.9", "7.4"]
# What is the best way to sort such an array of strings?
# What if the string was extended to "10.1.25".

others have shown split+map 

you can also do it w the humble scanf (yes, like c's scanf)

eg,

a.sort_by{|x| x.scanf "%d.%d"}
#=> ["7.4", "10.1", "10.9", "10.10", "10.11"]