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.
Youtuber Gear Command Block 1.9.1/1.9. Youtuber Gear with only one command block. Be a Youtuber in Minecraft with this only one command block creation. You will be able to craft Computers, mouses, cameras, speakers, gaming chairs and YouTube silver play buttons. This command is 100% survival friendly, meaning that all the items are craftable in survival. 1  To add any one-command creation to your world, first give yourself a command block with /give @p minecraft:command_block.  Next, place it and paste the following command inside it.