tag:www.refactormycode.com,2007:users81 bauser Sun Sep 30 16:29:08 -0700 2007 tag:www.refactormycode.com,2007:Refactor140 2007-09-30T16:29:08-07:00 [Ruby] On compound interest <p>I'm not sure what you are trying to do, but if you wanted to keep track of the values, you could do something like... </p> <pre>a = (0..8).inject([]) {|a, i| a &lt;&lt; (v += (v/100) * cap_growth)}</pre> bauser