|
Determines
whether the given parameter is a reference syntax to an existing object.
Parameters
|
Parameter
|
Description
|
|
v
|
A valid reference syntax expression.
If
v
is
not a reference syntax, the function returns false (
0
).
|
Examples
The
following expressions are examples that use the
Exists
function:
|
Expression
|
Returns
|
|
Exists(Item)
|
True (
1
) if the object
Item
exists
and false (
0
) otherwise.
|
|
Exists("hello world")
|
False (
0
). The string is
not a reference syntax.
|
|
Exists(Invoice.Border.Edge[1].Color)
|
True (
1
) if the object
Invoice
exists
and has a
Border
property, which in turn has at
least one
Edge
property, which in turn has a
Color
property.
Otherwise, the function returns false (
0
).
|
|
|
|
