Using Enumerable#select to create a specific array

Revision: 2236

at January 20, 2007 19:43 by vanne

Initial Code

#Instead of using:
books  = Book.find(:all, :order => 'id desc', :limit => 20)
comics = []
books.each do |book|
  comics << book if book.item_type == 'Comic'
end

#OR
comics  = Book.find(:all, :order => 'id desc', :limit => 20).map {|book| [book] unless book.item_type == 'Comic'}.flatten!

#Use this:
books  = Book.find(:all, :order => 'id desc', :limit => 20)
comics = books.select { |i| i.item_type == 'Comic' }

Initial URL

http://errtheblog.com/post/608

Initial Description

Useful for when you need to do a find and map specific results to an array for use later

Initial Title

Using Enumerable#select to create a specific array

Initial Tags

rails, ruby

Initial Language

Ruby

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