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.
Some Minecraft blocks. Blocks are a type of item in Minecraft. They make up the in-game environments, and they can be collected and utilized in different ways. Some blocks spawn naturally, such as Dirt or Stone, while others, such as Bricks or Redstone Lamps, must be crafted by the player.