Module: Scripsi

Defined in:
lib/scripsi.rb

Defined Under Namespace

Classes: SortedSuffixIndexer

Constant Summary collapse

@@partition_size = 
10

Class Method Summary collapse

Class Method Details

.connect(options = {}) ⇒ Object

connect to a redis server



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# File 'lib/scripsi.rb', line 6

def self.connect(options = {})
  @@redis = Redis.new(options)
end

.find(id) ⇒ Object 



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# File 'lib/scripsi.rb', line 52

def self.find(id)
  indexer(id)
end

.indexer(id) ⇒ Object

get the indexer with the given id



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# File 'lib/scripsi.rb', line 44

def self.indexer(id)
  type = Scripsi.redis.hget "scripsi:used", id.to_s
  if type == "ssi"
    SortedSuffixIndexer.build(id)
  end
end

.partition_size ⇒ Object 



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# File 'lib/scripsi.rb', line 16

def self.partition_size
  @@partition_size
end

.redis ⇒ Object 



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# File 'lib/scripsi.rb', line 10

def self.redis
  @@redis
end

.score(str) ⇒ Number

generate a ‘score’ for a string used for storing it in a sorted set

This method effectively turns a string into a base 27 floating point number, where 0 corresponds to no letter, 1 to A, 2 to B, etc.

Parameters:

  • str (String) —

    the string we are computing a score for

Returns:

  • (Number) —

    the string’s score



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# File 'lib/scripsi.rb', line 28

def self.score(str)
  str = str.downcase
  scrs = []
  str.split('').each_slice(partition_size) do |s|
    mult = 1.0
    scr = 0.0
    s.each do |char|
      mult /= 27
      scr += (char.ord-'a'.ord+1)*mult if ('a'..'z').include? char
    end
    scrs << scr
  end
  scrs
end