Rudelo

Provides Rufus::Decision::Matchers::SetLogic, for use with rufus-decision

Requires ruby 1.9.3

Currently not working on 1.9.2 -- I will try to get this working at some point. I Probably won't get 1.8.7 working.

Installation

In Gemfile:

# until 1.4.0 is published
gem 'rufus-decision', git: 'https://github.com/jmettraux/rufus-decision.git'

gem 'rudelo', git: "git://github.com/lastobelus/rudelo.git"

And then execute:

$ bundle

Usage

TABLE = Rufus::Decision::Table.new(%{
    in:group, out:situation
    $(bob jeff mary alice ralph) & $in #= 2, company
    $(bob jeff mary alice ralph) & $in same-as $in #= 3, crowd
    $(bob jeff mary alice ralph) >= $in #> 3, exclusive-party
    $(bob jeff mary alice ralph) & $in < $in #> 5, PARTY!
    $(bob jeff mary alice ralph) & $in < $in #> 3, party
  })
TABLE.matchers.unshift Rudelo::Matchers::SetLogic.new

table.transform({'group' =>  "bob alice"})
#=> {'group' => "bob alice", 'situation' => "company"}

table.transform({'group' => "bob alice jeff"})
#=> {'group' => "bob alice jeff", 'situation' => "crowd"})

table.transform({'group' => "bob alice jeff ralph"})
#=> {'group' => "bob alice jeff ralph", 'situation' => "exclusive-party"}

table.transform({'group' => "bob alice jeff don"})
#=> {'group' => "bob alice jeff don", 'situation' => "party"}

table.transform({'group' => "bob alice jeff mary ralph don"})
#=> {'group' => "bob alice jeff mary ralph don", 'situation' => "PARTY!"}

table.transform({'group' => "bob alice jeff mary don bev"})
#=> {'group' => "bob alice jeff mary don bev", 'situation' => "PARTY!"}

Documentation

For a detailed description of the mini-language the set logic matcher uses, see SET_LOGIC_MATCHER.md

Short-Circuiting

By default, Set Logic matchers short-circuit. That is to-say, if a cell does not match, the set logic matcher tells rufus-decision not to try any more matchers if the cell was valid set logic syntax. You can change this behaviour by setting matcher.short_circuit = false

Force Parsing

By default Set Logic matchers return false for matches? if they cannot parse a cell. Set matcher.force = true to force parsing and raise errors if a cell cannot be parsed.

Contributing

Fork it
Create your feature branch (git checkout -b my-new-feature)
Commit your changes (git commit -am 'Add some feature')
Push to the branch (git push origin my-new-feature)
Create new Pull Request