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.
Trivia. 1  You can spawn in a command block with cheats enabled by typing /give (player name) 137 or /give (player name) minecraft:command_block. 2  You can spawn mobs that are in the game, but cannot be spawned naturally. For Example, /summon Giant ~2 ~ ~ will summon a Giant Zombie 2 blocks away from the command block.