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.
Command block GUI. To enter or modify the command in a command block, use the Use Item control on the command block to open the command block GUI (graphical user interface). The GUI will only open if the player is in creative mode, and has the proper permissions.In singleplayer, cheats must be enabled to edit command blocks.ctivation [edit | edit source]. Command blocks are redstone mechanisms and can be activated by: 1  An adjacent active power component: for example, a redstone torch (except that a redstone torch will not activate a command block it is attached to), a block of redstone, a daylight sensor, a button etc.