How to check if an array key exists

[fairfax]

If I use a variable argument list is there a way to check how many of the variable arguments are set. For example:

public Object method Name(Object req_input, Object... add_inp)

I would like to know if add_input[0] is set, and also the number of add_inp[] entries that are set. Thanks.

[Fou-Lu]

Its an array. Use add_inp.length to determine if an offset is available (length is size + 1, so if its 0, you have no data). Try/catch can be used as well, but I would recommend using an if check instead.