Module: Linguist::SHA256

Defined in:
lib/linguist/sha256.rb

Class Method Summary collapse

Class Method Details

.hexdigest(obj) ⇒ Object

Public: Create deep nested digest of value object.

Useful for object comparison.

obj - Object to digest.

Returns String hex digest



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# File 'lib/linguist/sha256.rb', line 12

def self.hexdigest(obj)
  digest = Digest::SHA256.new

  case obj
  when String, Symbol, Integer, Float
    digest.update "#{obj.class}"
    digest.update "#{obj}"
  when TrueClass, FalseClass, NilClass
    digest.update "#{obj.class}"
  when Array
    digest.update "#{obj.class}"
    for e in obj
      digest.update(hexdigest(e))
    end
  when Hash
    digest.update "#{obj.class}"
    for e in obj.map { |(k, v)| hexdigest([k, v]) }.sort
      digest.update(e)
    end
  else
    raise TypeError, "can't convert #{obj.inspect} into String"
  end

  digest.hexdigest
end