Class: Date

Inherits:
Object
  • Object
show all
Defined in:
lib/matching/similarity.rb

Overview

Adds fuzzy methods to standard classes for comparing two instances on a rules-based scale between 0.0 and 1.0.

Instance Method Summary collapse

Instance Method Details

#similarity_to(other_date, opts = {}) ⇒ Object

Calculates a score between 0.0 and 1.0 for all dates within :days_scale of each other.

Raises:

  • (ArgumentError) 


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# File 'lib/matching/similarity.rb', line 11

def similarity_to(other_date, opts={})
  days_scale = opts[:days_scale] || 30
  raise ArgumentError, 'days_scale must be numeric' unless days_scale.class == Fixnum
  days_scale = days_scale.to_f

  delta = (self - other_date).to_f.abs
  (delta < days_scale ? (days_scale - delta) / days_scale : 0.0)
end