Right, all the uses of eval were unnecessary.
I came up with a quick utility along these lines, that allows you to pass in
an object like:
{"a.b.c": 1, "a.b.d":2, "a.b.e[0].f": 3, "a.b.e[1].g": 4}
Which you might get from a Prototype form utility function, and get back an
exploded object like:
{"a": {"b": {"c":1, "d":2, "e": [{"f": 3}, {"g": 4}]}}}
Which is suitable for passing to Object.toJSON(). It basically just handles
intermediate objects that can be ordinary values or arrays, but that handles
all the cases I can think of. Let me know what you think.
function to_exploded_object(object) {
var root = {};
$H(object).each(function(property) {
var current = root,
path = property.key.split("."),
last = path.pop();
function set_and_advance_key(key, value) {
var match = key.match(/^(\w+)(?:\[(\d+)\])?/),
name = match[1],
index = match[2];
if (index) {
index = parseInt(index);
current[name] = current[name] || [];
current[name][index] = current[name][index] || value;
current = current[name][index];
} else {
current[name] = current[name] || value;
current = current[name];
}
}
path.each(function(key) { set_and_advance_key(key, {}); });
set_and_advance_key(last, property.value);
});
return root;
}
-Fred
On Wed, Jun 11, 2008 at 4:43 PM, kangax <[EMAIL PROTECTED]> wrote:
>
> Fair enough, but still makes little sense to use eval:
>
> function toObject(str) {
> var result = { };
> str.split('.').inject(result, function(parent, child) {
> return parent[child] = parent[child] || { };
> });
> return result;
> };
>
> toObject('foo.bar.baz'); // { foo: { bar: baz: { }}}
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