What's the best way to model recurring events in a calendar application?

What's the best way to model recurring events in a calendar application?

ruby algorithm calendar data-modeling recurrence

ruby

Sort an array according to the elements of another array

ruby arrays algorithm sorting

ruby

All factors of a given number

ruby algorithm math

ruby

Calculate 95th percentile in Ruby?

ruby ruby-on-rails-3 algorithm math

ruby

Generating unique, hard-to-guess "coupon" codes

ruby-on-rails ruby algorithm uniqueidentifier

ruby

Adjacency list and graph

ruby algorithm

ruby

Algorithm implemented in ruby to add one to a number represented as an array

arrays ruby algorithm

ruby

Solution for finding "duplicate" records involving STI and parent-child relationship

mysql sql ruby-on-rails ruby algorithm

ruby