Scala学习-分割字符串中的单词

Posted 2021-06-18 Mr.zhou_Zxy

package FOP

object GroupBy{
    def main(args: Array[String]): Unit = {
        /**定义一个字符串数组*/
        val array = Array("I love you", "I love Basketball", "I love PS5")
        test_groupBy(array)
    }
    def test_groupBy(array:Array[String]): Unit ={

        /**对数据中的单词进行切割，并将切割后的数组存放在array1中*/
        val array1 = array.flatMap(_.split("\\\\s+"))
        println(array1.mkString("[",",","]"))
        /**在array1中按单词分组*/
        val map = array1.groupBy(word => word)
        /**遍历查询map中的k,v*/
        map.foreach(t => println(s"key = ${t._1}",s"${t._2.mkString("[",",","]")}"))
        /**查询map中v的长度，即为k的出现的次数*/
        val map1 = map.map(t => (t._1,t._2.length))
        /**foreach打印map1中的元素*/
        map1.foreach(println)
        println("----------------------------实现统计array数组中单词出现的次数-------------------------------------------")
        array.flatMap(_.split("\\\\s+")).groupBy(word => word).map(t => (t._1,t._2.length)).foreach(println)
    }
}