In brief: allow Symbol's to be constructed with a single parameter, with
the following behavior:

> var obj = {};
undefined
> new Symbol({}) === new Symbol({})
false
> new Symbol(obj) === new Symbol(obj)
true

Motivation: the ability to construct equal Symbols gives us the necessary
building blocks to build custom maps with semantics very similar to Simple
Maps[1]:

function ObjectMap() {
    this.map = {};
}

SimpleMap.prototype.set = function(objKey, val) {
    this.map[new Symbol(objKey)] = val;
};

SimpleMap.prototype.get = function(objKey) {
    return this.map[new Symbol(objKey)];
};

At a surface level, this seems more novelty than anything else, but I think
it's a useful primitive for building more complex and robust features on
top of Symbols.  Thoughts?

[1] http://wiki.ecmascript.org/doku.php?id=harmony:simple_maps_and_sets

-- 
Jeremy Martin
661.312.3853
http://devsmash.com
@jmar777
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In brief: allow Symbol's to be constructed with a single parameter, with
the following behavior:

```
> var obj = {};
undefined

> new Symbol({}) === new Symbol({})
false

> new Symbol(obj) === new Symbol(obj)
true
```

Motivation: the ability to construct equal Symbols gives us the necessary
building blocks to build custom maps with semantics very similar to [Simple Maps][1]:

```js
function ObjectMap() {
    this.map = {};
}

SimpleMap.prototype.set = function(objKey, val) {
    this.map[new Symbol(objKey)] = val;
};

SimpleMap.prototype.get = function(objKey) {
    return this.map[new Symbol(objKey)];
};
```

At a surface level, this seems more novelty than anything else, but I think
it's a useful primitive for building more complex and robust features on
top of Symbols.  Thoughts?

[1]: http://wiki.ecmascript.org/doku.php?id=harmony:simple_maps_and_sets