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\'
}
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Answer 1

Function name is terrible and the code was quickly made, but it should work. Note that this modifies the original object, I am not sure if you wanted to create a new object that is expanded version of the old one.

(function(){

    function parseDotNotation( str, val, obj ){
    var currentObj = obj,
        keys = str.split("."), i, l = keys.length - 1, key;

        for( i = 0; i < l; ++i ) {
        key = keys[i];
        currentObj[key] = currentObj[key] || {};
        currentObj = currentObj[key];
        }

    currentObj[keys[i]] = val;
    delete obj[str];
    }

    Object.expand = function( obj ) {

        for( var key in obj ) {
        parseDotNotation( key, obj[key], obj );
        }
    return obj;
    };

})();



var expanded = Object.expand({
    'ab.cd.e' : 'foo',
        'ab.cd.f' : 'bar',
    'ab.g' : 'foo2'
});



JSON.stringify( expanded );  


//"{"ab":{"cd":{"e":"foo","f":"bar"},"g":"foo2"}}"