Bool isInitialised(var a x)
Arguments
x: A possibly initialised variable
Usage
Returns true if the value is initialised, or false if not (for example, an uninitialised array element)
arr = [];
arr[2] = 55;
b = isInitialised(arr); // true
b = isInitialised(arr[2]); // true
b = isInitialised(arr[1]); // false