var dict = {};

var path = 'a.b.c';

var path2 = 'a#b#c';

var valueToObject = 55;

​

​

// Estendendo o objeto JSON para incluir o método toObject

JSON.stringPathToObject = function(path, value, separator) {

  const separatorValue = separator || ".";

  return path.split(separatorValue).reduceRight((acc, key) => ({ [key]: acc }), value);

};

​

// Usando o novo método JSON.toObject

let result = JSON.stringPathToObject(path, valueToObject);

console.log(JSON.stringify(result, null, 2));

​

let result2 = JSON.stringPathToObject(path2, valueToObject, "#");

console.log(JSON.stringify(result2, null, 2));