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28 lines
712 B
Swift
28 lines
712 B
Swift
//
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// File.swift
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// Readability
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//
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// Created by Shibo Lyu on 2022/5/19.
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//
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import Foundation
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public struct RAFleschReadingEaseScorer: RAScorer {
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static let requiresCommonMetrics: Set<RACommonMetric>? = [
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.avgWordsPerSentence,
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.avgSyllablesPerWord
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]
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static let meta = RAScorerMeta(
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name: "Flesch Reading Ease",
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creator: "Rudolf Flesch",
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citation: "Flesch, R. (1948). A new readability yardstick. Journal of applied psychology, 32(3), 221."
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)
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func score(_ text: String, metrics: RACommonMetricsCalculator.Results?) -> Double {
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let asl = metrics![.avgWordsPerSentence]!
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let asw = metrics![.avgSyllablesPerWord]!
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return 206.835 - (1.015 * asl) - (84.6 * asw)
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}
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}
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