algorithm - 基于算法的大小写匹配字符串。我应该使用哪种算法？

Question

我需要在我的代码中将电视收视率(针对电视节目)转换为该收视率的案例对象。因此我有一个这样的案例匹配:

def fromString(s: String): Option[TvRating] = s.toLowerCase match {
  case "tvy" | "tv-y" | "tv y" | "y" => Some(tvY)
  case "tvg" | "tv-g" | "tv g" | "g" => Some(tvG)
  case "tvpg" | "tv-pg" | "tv pg" | "pg" => Some(tvG)
  case "tv14" | "tv-14" | "tv 14" | "14" => Some(tv14)
  case "tvma" | "tv-ma" | "tv ma" | "ma" => Some(tvMA)
  case _ => Some(noTvRating)
}

如您所见，我正在尝试匹配每个评级的所有排列，这很麻烦，而且仍然没有考虑到“tv.14”或“成熟观众”等内容。

是否有像 soundX 这样的算法，但对于像这些评级这样的代码，我可以将其用作最后的手段。然后我的代码将如下所示:

def fromString(s: String): Option[TvRating] = s.toLowerCase match {
  case "tvy" | "tv-y" | fancyAlgo(s, "tv-y") => Some(tvY)
  case "tvg" | "tv-g" | fancyAlgo(s, "tv-g") => Some(tvG)
  case "tvpg" | "tv-pg" | fancyAlgo(s, "tv-pg") => Some(tvG)
  case "tv14" | "tv-14" | fancyAlgo(s, "tv-14") => Some(tv14)
  case "tvma" | "tv-ma" | fancyAlgo(s, "tv-ma") => Some(tvMA)
  case _ => Some(noTvRating)
}

或者我可以使这些匹配更可靠的任何其他建议。由于 tv-g 不是像“狗”或“马”这样的词，我不能根据音频或类似的发音词来判断。

这是评级的一个例子。还有其他比赛。这是另一个星级评级示例(如烂番茄的电影评级)

def fromString(s: String): Option[StarRating] = s.toLowerCase match {
  case "1" | "one star" | "one stars" => Some(oneStar)
  case "1.5" | "1.5 stars" | "one and a half stars" => Some(oneAndHalfStar)
  case "2" | "2 stars" | "two stars" => Some(twoStars)
  case "2.5" | "2.5 stars" | "two and a half stars" => Some(twoAndHalfStars)
  case "3" | "3 stars" | "three stars" => Some(threeStars)
  case "3.5" | "3.5 stars" | "three and a half stars" => Some(threeAndHalfStars)
  case "4" | "4 stars" | "four stars" => Some(fourStars)
  case _ => Some(noStars)
}

干杯!

Answer 1

数据驱动:

val ratings = scala.collection.mutable.Map[String, String]() withDefaultValue "noTVRating"

type TvRating = String

def addRatingStyle(base:String, result:String) = {
  val suffix = base.stripPrefix("tv")
  ratings += ("tv"+suffix->result)
  ratings += ("tv-"+suffix->result)
  ratings += ("tv "+suffix->result)
  ratings += (suffix->result)
}

addRatingStyle("tvy", "tvy")
addRatingStyle("tvg", "tvg")
addRatingStyle("tvpg", "tvpg")
addRatingStyle("tv14", "tv14")
addRatingStyle("tvma", "tvma")


def fromString(s: String): Option[TvRating] = Some(ratings(s.toLowerCase))