iterable modifier

iterable-modifier.js

'use strict';

const util = require('util');
const dump = (obj) => console.log.call(null, util.inspect(obj));
const change = (obj, path, newValue) => {

    const iterable = path
        .split('.')
        [Symbol.iterator]();

    for (let iter = iterable.next(), modifier = null; obj !== undefined; iter = iterable.next()) {

        if (!iter.done) {
            modifier = ((obj) => (value) => obj[iter.value] = value)(obj);
            obj = obj[iter.value]
            continue;
        }

        modifier(newValue);
        return true;
    }

    return false;
}

const example = {
    foo: {
        bar: {
            value: 1,
        },
    },
};

dump(example);
change(example, 'foo.bar.value', 2);
dump(example);