# FIXME: write some decent examples require "johnson" Johnson.evaluate("4 + 4") # => 8 Johnson.evaluate("4 + foo", :foo => 4) # => 8
We haven't rolled an official 1.0 for Johnson, though we plan to Real Soon Now. For the moment, follow the instructions in “Installing Development Versions”. Once we push a 1.0 to RubyForge, it'll be as easy as:
[sudo] gem install johnson
Installing Development Versions
We periodically update Johnson's gemspec on Github. Rather than installing the official releases (hosted on RubyForge), you can track the development version. Development versions will have a timestamped version number, like 184.108.40.206806232349.
# requires RubyGems 1.2! [sudo] gem sources -a http://gems.github.com [sudo] gem install jbarnette-johnson
Copyright 2008 John Barnette, Aaron Patterson, Yehuda Katz, Matthew Draper
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.