Texas Instruments TI-89 - Last_Element_Index

676
Appendix A: System Routines — Lists and Matrices
TI
-
89 / TI
-
92 Plus Developer Guide
Not for Distribution
Beta Version January 26, 2001
last_element_index
Declaration:
EStackIndex
last_element_index
(EStackIndex
i
)
Category(ies):
Lists and Matrices
Description:
Returns an index to the last element of the expression indexed by
i
.
Inputs:
i
— Index of the top tag of a tail of expressions.
Outputs:
Returns
i
if
i
indexes an END_TAG. Otherwise returns the index of the last
element of a nonempty tail indexed by
i
.
Assumptions:
None
Side Effects:
None
Availability:
On AMS 1.05 and higher.
TI
-
89 / TI
-
92 Plus
Differences:
None
See Also: remaining_element_count
Example:
push_quantum (END_TAG);
last_element_index (top_estack); /* Returns top_estack */
push_Float (3.7);
foo = top_estack;
push_Float (5.4);
last_element_index (top_estack); /* Returns foo */