Hi!

You can use type() function to see if variable already exists. If variable exists, use type("MyArray[1]") == "U" to see if it is array.

However, indeed, type() function works slowly. In usual case in some kind of the algorithm it is much better to add a logical flag that will become .T. as soon as array defined. Example:


local llArrayCreated
....
if llArrayCreated AND len(MyArray,1)=nSomeValue && note that len() will not be evaluated when
&& llArrayCreated is .F. - VFP do not continue to calculate logical expression
&& when its result is alredy determined for sure. This could be not true for
&& some other programming languages, for example, for VB
...
dimension MyArray(...)
llArrayCreated = .T.
...
endif


Above is much more clear and more natural way of programming for all programming languages.

HTH.

>I am using an array in a program and on the first pass through a method, it is possible that the array hasn't been created yet (the routine is primarily for subsequent passes). Of course I get an error when I do a ALEN on the non-existant array. I have tried various commands to see if I can check for it but they all generate an error. Is there a command that can tell if an array (or variable of anytype), exists without generating an error?