Two open issues remain: On May 4, 2009, at 6:20 PM, Allen Wirfs-Brock wrote:
In the function defined for the example's invoke item the first argument to apply probably should be obj rather than peer.
Possibly, but in the example peer[id] may be a function that insists on |this| being bound to peer, not obj. If the function is pure, the arguments flow in and a result comes back, and the catchall delegates without mutating peer or obj. If the function mutates |this|, then the effects can be recovered by calling other methods, or by property access, which again is delegated without a wrapper.
I would be inclined to specify an additional argument (probably the first) for each handler function that would be passed the "this" value. Closure capture like is done in the example works but my intuition is that there will be situations where it would be handy to use the same catch-all descriptor for several objects.
Agreed, but why not use |this| instead of an extra (leading) parameter? /be _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
