【SCALA】2、驼峰，下划线互转

package spark

/**
  * @ProjectName: cutter-point
  * @Package: spark
  * @ClassName: Demo1
  * @Author: xiaof
  * @Description: ${description}
  * @Date: 2019/5/30 9:27
  * @Version: 1.0
  */

object Hello {

  //定义下滑转驼峰
  def underlineToHump(str : String) : String = {
    var spStr : Array[String] = str.split("_")
    //循环这个数组
    var result = ""
    var index = 0
    for(i <- 0 to str.length - 1) {
      if(str.charAt(i) == ‘_‘) {
        index = 1 + i
      } else {
        if(i == index && i != 0) {
          result += str.charAt(i).toUpper
        } else {
          result += str.charAt(i)
        }
      }
    }
    result
  }

  /**
    * 驼峰转下滑
    * @param str
    * @return
    */
  def humpToUnderLine(str : String) : String = {
    var result = ""

    for(char <- str) {
      if(char.isUpper) {
        result += "_" + char
      } else {
        result += char
      }
    }

    result
  }

  def main(args: Array[String]): Unit = {
    println("hello world scala");

    println(underlineToHump("hell_iii"))

    println(humpToUnderLine(underlineToHump("hell_iii")))

  }
}