assign_at — Assignment of one or several values to one or several tuple elements.
assign_at assigns a single value to one or several
elements of a tuple, or it assigns a number of values elementwise to the
specified elements of the output tuple.
All other elements of the output tuple keep their values.
If the passed indices are out of the current range of the output tuple,
the tuple is increased and the new values are initialized to a
default value.
In the full text editor an assign_at operation is simply entered
with the help of the assignment operator symbol := and the
index access operator symbol [ ] following the output
variable.
The Index parameter can be any expression that evaluates to any
number of positive integer values.
The Value parameter must evaluate to exactly one value or to
the same number of indices that are provided via the Index
parameter, e.g.:
Areas[Radius-1] := Area
Areas[0,4,|Rad|-1] := 0
FileNames[0,2,4] := ['f1','f2','f3']
The operator assign_at replaces and extends the modifying version
of the old insert operator.
Index (input_control) integer(-array) → (integer)
Indices of the elements that have to be replaced by the new value(s).
Default value: 0
Suggested values: 0, 1, 2, 3, 4, 5, 6
Minimum increment: 1
Value (input_control) tuple(-array) → (integer / real / string)
Value(s) that has to be assigned.
Default value: 1
Result (output_control) tuple(-array) → (real / integer / string)
Result tuple containing the assigned values.
If the expression is correct
assign_at returns 2 (H_MSG_TRUE). Otherwise an
exception is raised and an error code returned.
Foundation