index_values()

List function that returns the list of the index values that satisfy the given test.

Synopsis

index_values(list-expression, operator, expression)

List function that returns the list of the index values that satisfy the given test.

list-expression: list the funciton is applied to.
operator: mathematical comparison operator: <, <=, >, >=, ==, or !=.
expression: expression that <op> is applied to in relation to <list_expr>.

Sub-list of the index values that satisfy the given test.

The following results in index_list equal to list(1,2,4):

old_list = list(2,10,8,4,6)
index_list = index_values(old_list, >, old_list[0] + 3)

Use of the prefix form, such as gt rather than infix form >, for <op> results in an error.