How can I *unpack* an object into a function's scope?

Question

I have this code...

function a(options) {
    for (var item in options) {
       if ( ! options.hasOwnProperty(item)) {
          continue;
       }
       t         


        

Answer 1

You can access the function from inside itself using the callee property:

function a(options) {
    var thiz = arguments.callee;
    for (var item in options) {
        if (!options.hasOwnProperty(item)) {
            continue;
        }
        thiz[item] = options[item];
    }
}

a({
    'abc': 'def'
});

alert(a.abc);

Alternatively, you can set the scope when you call it:

function a(options) {
    for (var item in options) {
        if (!options.hasOwnProperty(item)) {
            continue;
        }
        this[item] = options[item];
    }
}

a.call(a, {
    'abc': 'def'
});
alert(a.abc);