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.
1 For example: /give Steve minecraft:command_block 5. â / 2 setblock x y z minecraft:command_block â â The setblock command changes a particular block into a command block using its location. 3  To determine the location of a block, press F3 on your keyboard and look at the block you wish to change.. Set command block actions. In the text box at the top of the menu, type in a command in the same way you would in the chat box. The command block functions just like the chat; however, it can be attached to a button or a circuit to execute commands automatically.