code: function deepSet(parent, key, value, mode) {
      // if(typeof value==='string') value = value.replace(/(\r\n|\r|\n)\s*$/, ''); // replace line endings and white spaces
      var parts = key.split('.');
      var current = parent;
      if(key==='this') {
          if(mode==='push') parent.push(value);
          else parent = value.toString();
      }
      else {
          for(var i=0; i<parts.length; i++) {
              if(i >= parts.length-1) {
                  if(mode==='push') current[parts[i]].push(value);
                  else current[parts[i]] = value;
              }
              else current[parts[i]] = current[parts[i]] || {};    
              current = current[parts[i]];
          }
      }
      return parent;
  }
docs: Define cascading props in objects in namespace separated by dot,
  if props are on lower level, it will create empty object
  @param {Object} parent base object where you want add props
  @param {String} namespace dot separated
  @param {Object} value value to add to object prop
  @param {String} mode if "push", it will add value to array
  @returns {Object}  parent object after properties are added