JsonHelper - convert a json to array with values and props i.e. {value: "ghi", prop: ".money.some.arr[2]", key: "2", name: "2", context: "context.money.some.arr[2]"} & dynamic key access by string selecter

JsonHelper.js

/**
  -- HOW TO USE --
  let data = {
    user: "Khizer",
    company: "Shopdesk",
    showName: "Eid",
    money: {
        amount: 1000,
        currency : "PKR",
        some: {
            more: 'Khizer',
            arr: [
                "abc",
                "def",
                "ghi"
            ]
        }
    },
    status: true,
    messgae: "Call successfull"
  }
  let tmp = JsonHelper;
  console.log(tmp.toArray(data)); // generate for selecter
  console.log(tmp.byString(data, ".money.some.arr[2]")) // access by string

*/

class JsonHelper {
  constructor () {
      this._result = Array();
  }
  camelCaseToWords(str){
      if(!isNaN(str)) return str;
      return str.match(/^[a-z]+|[A-Z][a-z]*/g).map(function(x){
          return x[0].toUpperCase() + x.substr(1).toLowerCase();
      }).join(' ');
  };
  toArr(obj, p="") {
      const result = [];
      for (const prop in obj) {
          const value = obj[prop];
          // let propD = "['"+prop+"']";
          let propD = prop;
          if(!isNaN(prop)) { // is number
              propD = "[" + parseInt(prop) + "]";
          }
          else {
              propD = "."+prop;
          }

          let tmp = p=="" ? propD : p + propD ;
          if (typeof value === 'object') {
              result.push(this.toArr(value, tmp)); // <- recursive call
          }
          else {
              result.push({
                  value,
                  prop: tmp,
                  key: prop,
                  name: this.camelCaseToWords(prop)
              });
          }
      }
      return result;
  }
  extractElements (obj) {
      obj.forEach(e=>{
          if(Array.isArray(e)) {
              this._result = this.extractElements(e);
          }
          else {
              this._result.push(e);
          }
      })
      return this._result;
  }
  toArray(d) {
      this._result = Array();
      let arrayTmp = this.extractElements(this.toArr(d));
      arrayTmp.forEach(e=>{
          e.context = "context"+e.prop;
      })
      return arrayTmp;
  }
  byString (o, s) { // obj , prop
      s = s.replace(/\[(\w+)\]/g, '.$1'); // convert indexes to properties
      s = s.replace(/^\./, '');           // strip a leading dot
      var a = s.split('.');
      for (var i = 0, n = a.length; i < n; ++i) {
          var k = a[i];
          if (k in o) {
              o = o[k];
          } else {
              return;
          }
      }
      return o;
  }
}