用命令替换函数

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
  }
}

反之用命令替换函数

别名用方法对象替换方法