Convert javascript dot notation object to nested object

Question

I\'m trying to build a function that would expand an object like :

{
    \'ab.cd.e\' : \'foo\',
    \'ab.cd.f\' : \'bar\',
    \'ab.g\' : \'foo2\'
}
<         


        

Answer 1

You could split the key string as path and reduce it for assigning the value by using a default object for unvisited levels.

function setValue(object, path, value) {
    var keys = path.split('.'),
        last = keys.pop();

    keys.reduce((o, k) => o[k] = o[k] || {}, object)[last] = value;
    return object;
}

var source = { 'ab.cd.e': 'foo', 'ab.cd.f': 'bar', 'ab.g': 'foo2' },
    target = Object
        .entries(source)
        .reduce((o, [k, v]) => setValue(o, k, v), {});

console.log(target);