View source for Sorting by multiple columns in Ruby

In Ruby, it's quite easy to sort an array by a single column.  For example:

<geshi lang="ruby>
people.sort_by { |p| p.lastname }
</geshi>

However, it's not clear how to easily sort by more than one column.  Fortunately, there is a very easy way - simple put the columns you want into an array.

<geshi lang="ruby>
people.sort_by { |p| [p.lastname, p.firstname] }
</geshi>

This will handle nil values and any other corner cases perfectly.

[[Category:Ruby]]