ObjectP
From Director Online Wiki
objectP is one of the predicate functions in Lingo. objectP returns either true or false depending on whether the variable in question is a complex variable type such as an object created from a parent script, and Xtra or a Window. In addition objectP will return true if pass a list or property list.
Example
testScript = new (script"foo")
put objectP(testScript)
-- 1
testList = [1,2,3,4,5]
put objectP(testList)
-- 1
As such it is usually much safer to use the ilk function to determine the exact type of a variable.
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What is an object?
All the following are considered to be objects:
- scripts
- instances of scripts
- property and linear lists
- points and rects
- members
- sprites
- vectors
- colors
These data types all have properties, and are passed by reference rather than by value.
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