Posted over 7 years ago. Visible to the public.

Ruby: Enumerable#partition

If you want to sort values from an enumerable into two arrays based on whether they match a certain criteria or not, Enumerable#partition Archive can come in handy.

# Enumerable#partition returns two arrays, # the first containing the elements of enum # for which the block evaluates to true, # the second containing the rest. (1..6).partition { |v| n.even? } #=> [[2, 4, 6], [1, 3, 5]]

Works well with destructuring assignment, too.

even, odd = (1..6).partition { |n| n.even? } even #=> [2, 4, 6] odd #=> [1, 3, 5]

Does your version of Ruby on Rails still receive security updates?
Rails LTS provides security patches for unsupported versions of Ruby on Rails (2.3, 3.2, 4.2 and 5.2).

Owner of this card:

Thomas Klemm
Last edit:
over 7 years ago
by Thomas Klemm
About this deck:
We are makandra and do test-driven, agile Ruby on Rails software development.
License for source code
Posted by Thomas Klemm to makandra dev
This website uses short-lived cookies to improve usability.
Accept or learn more