lunr.Builder.prototype.calculateAverageFieldLengths = function()

in assets/js/lunr/lunr.js [2552:2578]

• 20 lines of code
• 5 McCabe index (conditional complexity)

lunr.Builder.prototype.calculateAverageFieldLengths = function () {

  var fieldRefs = Object.keys(this.fieldLengths),
      numberOfFields = fieldRefs.length,
      accumulator = {},
      documentsWithField = {}

  for (var i = 0; i < numberOfFields; i++) {
    var fieldRef = lunr.FieldRef.fromString(fieldRefs[i]),
        field = fieldRef.fieldName

    documentsWithField[field] || (documentsWithField[field] = 0)
    documentsWithField[field] += 1

    accumulator[field] || (accumulator[field] = 0)
    accumulator[field] += this.fieldLengths[fieldRef]
  }

  var fields = Object.keys(this._fields)

  for (var i = 0; i < fields.length; i++) {
    var fieldName = fields[i]
    accumulator[fieldName] = accumulator[fieldName] / documentsWithField[fieldName]
  }

  this.averageFieldLength = accumulator
}