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package co.ifwe.antelope.feature
import co.ifwe.antelope._
import co.ifwe.antelope.util._
* Term popularity gives the frequency with which the document is selected
* when the term is present.
* @param ide
* @param t
* @param s
* @tparam T context type in which we will be scoring this feature
class TermPopularityFeature[T <: ProductSearchScoringContext](ide: IdExtractor, t: Terms)(implicit val s: State[T])
extends Feature[ProductSearchScoringContext] {
val ct = s.counter(t.termsFromUpdate, ide)
override def score(implicit ctx: ProductSearchScoringContext) = {
val queryTerms = t.termsFromQueryContext(ctx)
id: Long => => {
ct(term, id) div ct(term)
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