Question

I have a function like this:

Session.get = function(key) {
    if (!window["_SESSION"] || typeof key == 'undefined') {
        return window["_SESSION"] || {};
    }

    if (key.indexOf('.') === -1) {
        return window["_SESSION"][key] || {};
    }

    var keyArr = key.split('.'), val = window["_SESSION"];

    for ( var i = 0; i < keyArr.length; i++) {
        if (typeof val[keyArr[i]] === 'undefined') {
            return null;
        }
        val = val[keyArr[i]];
    }

    return val;
}

This function allows me to get nested values without temporary variable outside of the function. Example Session.get('var.nestedvar') is returns value of window[_SESSION']['var']['nestedvar'].

Bat how can I (un)set variables like so? Tried to delete val; but didn’t work.. How do the javascript references work? Does anybody know any alternative to accomplish similiar functionality?

Answer 1

You can delete by parent like this:

[10:00:00.380] a = {'root': {'home':'~'}}
[10:00:00.385] ({root:{home:"~"}})
--
[10:00:09.625] b = a['root']
[10:00:09.631] ({home:"~"})
--
[10:00:20.569] delete b['home']
[10:00:20.573] true
[10:00:21.684] a
[10:00:21.688] ({root:{}})