Here's a little code snippet that I wrote recently to convert a namespaced string, value into an JavaScript object. i.e. if passed a value ("foo.bar.baz", 10) the function will return an JavaScript object {foo:{bar:{baz:10}}}.
// @input key = "foo.bar.baz", value = 10
// @output {foo:{bar:{baz:10}}}
function toHash(key, value){
var parts = key.split('.').reverse(),
i, foo = {}, bar = {};
foo[parts.shift()] = value;
bar = foo;
for(i=0; i<parts.length; i++){
bar = {};
bar[parts[i]] = foo;
foo = bar;
}
return bar;
}
Run this code in JSFiddle: http://jsfiddle.net/z89jr0k3/
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