Knockout includes a function called ko.isObservable() . You can call it like ko.isObservable(vm[key]) . Update from comment: Here is a function to determine if something is a computed observable: UPDATE: If you are using KO 2.1+ - then you can use ko.isComputed directly.
Command Block. The Command Block is a redstone-powered block that was made available in the 1.4 update for Minecraft. The Command Block will perform server Commands when attached to a redstone circuit. This block cannot be crafted, and only server operators are allowed to place and use them.
Warning: this wiki page is not completely up to date with the minecraft version 1.6.4 modpacks. Ore processors are not blocks but complex machines consisting of many blocks from one or more mods. They are typically able to be automated but some mods are easier to automate.