tabulate

Make a sequence by performing a function on the index.

This function makes a sequence of type type whose i-th element is func(i) for 0 <= i < length. Type must be a subtype of <mutable-sequence>.

For example, I want a vector of the annual worth of an account of $10000 earning 10 percent annually. The below code creates that vector:

tabulate(10, method(x) 10000 * exp(x * .1) end, type: <vector>)

Or, to create a list of factorials, one could write this:

define function factorial(x :: limited(<integer>, min: 0))
=> (y :: <integer>)
  if(x == 0)
    1;
  else
    reduce1(\*, tabulate(x, curry(\+, 1)));
  end if;
end function factorial;

tabulate(6, factorial);

Exported from

Module sequence-utilities

Arguments

length	An instance of <integer>.
func	An instance of <function>. The signature of func is (<integer>) => (<object>).
type:	An instance of <type>, a subclass of <mutable-sequence>. The default is <list>.

Values

list	An instance of <mutable-sequence>.