There are two way to check.first is you can directly check whether key contain A or not in binding like this:-. but i think this is not the better way so instead of this you can use ko.computed to check.
Check for operating system information in Windows 7. 1  Click the Start button , enter Computer in the search box, right-click Computer, and then click Properties. 2  Look under Windows edition for the version and edition of Windows that your PC is running.
Get the latest version of iTunes. Learn how to update to the latest version of iTunes. If you have iTunes installed on your computer, follow the directions below to update to the latest version of iTunes. If you don't have iTunes installed on your computer, download it here.et the latest version of iTunes. Learn how to update to the latest version of iTunes. If you have iTunes installed on your computer, follow the directions below to update to the latest version of iTunes. If you don't have iTunes installed on your computer, download it here.