How do I parse a string to number while destructuring?

Question

I am trying to experiment around destructuring assignment. Now I have a case which I trying to cop up with destructuring itself.

For example, I have an input like th

Answer 1

I would probably set things up so that each "object type" I cared about had a corresponding "parser type": an object with the same keys, but whose values are the appropriate parsing functions for each member.

Like so:

"use strict";

var arr = {
    latitude: "17.0009",
    longitude: "82.2108"
};

function Parser(propParsers)
{
    this.propParsers = propParsers;
    this.parse = function (obj) {
        var result = {};
        var propParsers = this.propParsers;
        Object.keys(obj).forEach(function (k) {
            result[k] = propParsers[k](obj[k]);
        });
        return result;
    };
}

var parser = new Parser({
    latitude: Number,
    longitude: Number
});

let {latitude,longitude} = parser.parse(arr);
console.log(latitude);
console.log(longitude);