https://github.com/bagilevi/strategy_bag
Ruby DSL for making conditionals more readable by defining a set of strategies.
https://github.com/bagilevi/strategy_bag
Last synced: 3 months ago
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Ruby DSL for making conditionals more readable by defining a set of strategies.
- Host: GitHub
- URL: https://github.com/bagilevi/strategy_bag
- Owner: bagilevi
- License: mit
- Created: 2014-02-04T22:10:57.000Z (over 11 years ago)
- Default Branch: master
- Last Pushed: 2014-02-05T12:39:21.000Z (over 11 years ago)
- Last Synced: 2025-02-13T05:18:03.386Z (3 months ago)
- Language: Ruby
- Size: 148 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE.txt
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README
# StrategyBag
[](http://badge.fury.io/rb/strategy_bag)
[](https://travis-ci.org/bagilevi/strategy_bag)
[](https://codeclimate.com/github/bagilevi/strategy_bag)
Ruby DSL for making conditionals more readable by defining a set of strategies. Each strategy has a set of conditions and an action. The runner will select a strategy that meets the conditions and executes it.
## Installation
Add this line to your application's Gemfile:
gem 'strategy_bag'
And then execute:
$ bundle
Or install it yourself as:
$ gem install strategy_bag
## Example
Before:
```ruby
module Calc
extend self
def calc(a, b, c)
if a > 10
if b > 10
if c > 10
a + b - 2 * c
else
a + b + c
end
else
if c > 20
a + b - c
else
a + b + c
end
end
else
if b + c > 10
b + c - a
end
end
end
end
```
After:
```ruby
require 'strategy_bag'
module StrategicCalc
extend self
def calc(a, b, c)
Solver.new(a, b, c).run
end
class Solver < StrategyBag
params :a, :b, :c
condition(:a_high?, :a_low?) { a > 10 }
condition(:b_high?, :b_low?) { b > 10 }
condition(:c_high?, :c_low?) { c > 10 }
condition(:c_max?, :c_not_max?) { c > 20 }
condition(:bc_high?, :bc_low?) { b + c > 10 }
strategy do
condition :a_high?
condition :b_high?
condition :c_high?
action do
a + b - 2 * c
end
end
strategy do
condition :a_high?
condition :b_high?
condition :c_low?
action do
a + b + c
end
end
strategy do
condition :a_high?
condition :b_low?
condition :c_max?
action do
a + b - c
end
end
strategy do
condition :a_high?
condition :b_low?
condition :c_not_max?
action do
a + b + c
end
end
strategy do
condition :a_low?
condition :bc_high?
action do
b + c - a
end
end
default do
nil
end
end
end
```
## Contributing
1. Fork it ( http://github.com/bagilevi/strategy_bag/fork )
2. Create your feature branch (`git checkout -b my-new-feature`)
3. Commit your changes (`git commit -am 'Add some feature'`)
4. Push to the branch (`git push origin my-new-feature`)
5. Create new Pull Request