在es6类内创建由静态方法递归使用的计数器变量

Question

having a static recursive method , where i need to have a counter that should be declared.

please see the below snippet what am i doing any wrong here

one static method extracts data and another static method formats the data into a proper format

class Method(){
  constructor(payload){
    this.data = Method.extractData(payload)
  }

  static recursiveFunction(list, object ={}, methods){
    // recursive logic at a point 
    if(condtionNotSatisfied){
      this.recursiveFunction([value])
    }else{
      // dont call recursive function
      console.log(this.counter) // giving some times 8, 24
      this.counter = this.counter + 1
    }
  }

  static extractData(payload){
    return this.recursiveFunction(payload.list, {}, payload.methods)
  }

  Method.counter = -1;

}

module.exports = Method

how can i declare a varibale outside which can be used recursiveFunction

Any help appreciated

Answer 1

class Method(){
  constructor(payload){
    this.data = Method.extractData(payload)
  }

  static recursiveFunction(list, object ={}, methods){
    if (Method.counter === undefined){
       Method.counter = 0; //initialize here
    }
    // recursive logic at a point 
    if(condtionNotSatisfied){
      this.recursiveFunction([value])
    }else{
      // dont call recursive function
      console.log(Method.counter) // giving some times 8, 24
      Method.counter = Method.counter + 1
    }
  }

  static extractData(payload){
    return this.recursiveFunction(payload.list, {}, payload.methods)
  }

  Method.counter = -1;

}

module.exports = Method