A Net Promoter Score (NPS) calculator; does exactly as it says on the tin.
Add this line to your application's Gemfile:
gem 'nps'
And then execute:
$ bundle
Or install it yourself as:
$ gem install nps
Firstly, create a new survey:
require 'nps'
survey = Nps::Survey.new
Voting is simply achieved by:
# Promoter vote
survey.vote!(10)
# Passive vote
survey.vote!(8)
# Detractor vote
survey.vote!(6)
The NPS score can be calculated by:
# Calculate the NPS score
survey.score
It is also useful to know the percentage of votes in each category:
# Show the percentage of promoters, passives and detractors
survey.percentage_of_promoters
survey.percentage_of_passives
survey.percentage_of_detractors
By default NPS comes with an in-memory adapter NPS::Ballot for storing NPS votes. You can also optionally configure NPS to use a different adapter to store your votes in a database or another persistance store:
Nps.configure do |config|
config.ballot_adaptor = YourBallotAdapter
end
To use a different adapter you must implement the same API as NPS::Ballot.
class YourBallotAdaptor
# Public: Initialize a Net Promoter Score ballot to store votes cast
# on a survey.
def initialize
end
# Public: Cast a vote with a given NPS value.
#
# value - The value of the vote on the NPS scale.
# opts - A hash of meta data associated with the vote (default: {})
def vote!(value, opts = {})
end
# Public: Whether any votes have been cast.
def any_votes?
end
# Public: The total number of votes that have been cast.
def total_votes
end
# Public: Find the votes that have been cast with a
# NPS value in the range.
#
# range - The range of NPS values.
def find_votes(range)
end
# Public: Count the votes that have been cast with a
# NPS value in the range.
#
# range - The range of NPS values.
def count_votes(range)
end
end
- 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
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