string - 使用替换映射替换字符串上的多个单词

Question

我有替换 map
val replacements = Map( "aaa" -> "d", "bbb" -> "x", "ccc" -> "mx")
我想用相应的值替换字符串中每个映射键的所有出现。

val str = "This aaa is very bbb and I would love to cccc"
val result = cleanString(str, replacements)
result = "This d is very x and I would love to mx"

我已经做好了

val sb = new StringBuilder(str)
for(repl <- replacements.keySet) yield {
  sb.replaceAllLiterally(repl, replacement.get(repl))
}

但是我想要更多的功能，例如 map或 fold，其中我应用于字符串的函数将返回另一个字符串，而不需要在循环内修改可变变量。

Answer 1

一种选择:在foldLeft上使用Map并将str作为初始参数:

replacements.foldLeft(str)((a, b) => a.replaceAllLiterally(b._1, b._2))
// res8: String = This d is very x and I would love to mxc