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.. Open the Set Actions mention. Right-click the command block to open the menu that allows the user to set actions. 3. 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.