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.
Basic Controls. Before you can build anything in Minecraft, you must master the game's basic controls. This includes breaking and placing blocks, as well as scaling walls and structures to intricately place blocks in high places. To break blocks, hold the left mouse button until the block disintegrates.ether Portal. Once you master the overworld in Minecraft, you may wish to travel to The Nether for a more challenging experience. To travel to this realm, you will have to create a portal. To enter The Nether, collect 14 blocks of obsidian. Obsidian occurs deep underground where water pools and lava pools meet.