Difference between revisions of "Self"

Latest revision as of 20:38, 5 February 2016

The keyword Self is used in the definition of a Variable to refer to that variable.

Usually, a variable cannot refer to itself -- because it creates a cyclic dependency -- so you cannot use Self in common expressions. One exception is in the Dynamic function when referring to Self at a preceding Time period, e.g.

Variable X := Dynamic(10, Self[Time - 1]*(1 + growth))

The last parameter of Dynamic is an expression that can refer to Self, provided it is for a previous Time, as in this case.

The other exception is in IntraTable that allows cells of a table to refer to each other, using Self.

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-Self is used in the definition of a Variable to refer to that variable.  Usually, a variable cannot refer to itself -- because it creates a cyclic dependency -- so you cannot use Self in common expressions. One exceptions are in function [[Dynamic]]()  refer to Self at a preceding Time period, e.g.
+[[Category: Concepts]]
- Variable X := Dynamic(10, Self[Time-1] * (1 + growth))
-The last parameter of Dynamic is an expression that can refer to Self, provided it is for a previous Time, as in this case.
-The other exception is in [[IntraTable]], a new feature not officially released that allows cells of a table to refer to each other, using Self.
+The keyword [[Self]] is used in the definition of a Variable to refer to that variable.
+Usually, a variable cannot refer to itself -- because it creates a cyclic dependency -- so you cannot use [[Self]] in common expressions. One exception is in  the [[Dynamic]] function when referring to [[Self]] at a preceding [[Time]] period, e.g.
+:<code>Variable X := Dynamic(10, Self[Time - 1]*(1 + growth))</code>
+The last parameter of [[Dynamic]] is an expression that can refer to [[Self]], provided it is for a previous [[Time]], as in this case.
+The other exception is in [[IntraTable]] that allows cells of a table to refer to each other, using [[Self]].
+==See Also==
+* [[Self-Indexed Arrays]]
+* [[Dynamic]]
+* [[Time]]