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.
Accessing Command Blocks. 1  1. Open Minecraft on a PC or Mac. Only the computer edition of Minecraft has command blocks. 2  2. Enter a world where you have console access. Command blocks are in-game items that give access to the Minecraft console. 3  3. Switch to creative mode. Now that you have console access, you can switch to creative mode.