A very simple lazy evaluation for Ruby
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README.markdown

Lazyeval

Build Status Code Climate

Homepage: http://github.com/vitaly/lazyeval/

This GEM allows to call methods lazily. The actual work will not be performed until the result is used. There's no promise/force semantics, just a single call (or block) is stored and executed the first time the (lazy) result is accessed.

USAGE

simple lazy call

user = User.lazy.find(:first) # will not access a db
puts user.name # this will actually perform the find and then get the name from
			   # the result

example for a lazy block

user_name = User.lazy { |user| user.find(:first).user_name } # no db access
puts user_name # db will be accessed here

Contributing

  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Add tests for it. This is important so I don't break it in a future version unintentionally.
  4. Commit your changes (git commit -am 'Add some feature')
  5. Push to the branch (git push origin my-new-feature)
  6. Create new Pull Request

NOTE: do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)

Copyright

Copyright (c) 2009-2013 Vitaly Kushner. See LICENSE.txt for details.