用命令取代函數

refactorgram

  function score(candidate, medicalExam, scoringGuide) {
    let result = 0;
    let healthLevel = 0;
    // long body code
  }

class Scorer {
  constructor(candidate, medicalExam, scoringGuide) {
    this._candidate = candidate;
    this._medicalExam = medicalExam;
    this._scoringGuide = scoringGuide;
  }

  execute() {
    this._result = 0;
    this._healthLevel = 0;
    // long body code
  }
}

用函數取代命令的反向操作

別名用方法物件取代方法