Fundamentals of NewtonScript
func(parameterFirst, ..., parameterLast)
begin
code
end
Max
, that returns the larger of two values:
aFrame := { Max: func(a, b) begin if b > a then return b else return a; end, };A function always returns a value. If an executing function has a
return
statement, then that is the function's value. If the executing function does not have a formal return
statement, then the last executing statement is the function's value. A couple of examples should make this clear. You could rewrite the above Max
function in this way:
func(a, b) begin if b > a then b else a; end;The
return
statements can be removed because the value of the if
statement is either the value of b
or the value of a
(see "if/then/else Statements" on page 71). You can produce an even more minimal Max
:
func(a, b) if b > a then b else a;With one-statement functions, the
begin
and end
are unnecessary. Since the if
/else
is now only one statement, you can snip the begin
and end
.
While this last form of Max
is the smallest, it is not necessarily the best. Most people find the original Max
easier to read.
An online version of Programming for the Newton using Macintosh, 2nd ed. ©1996, 1994, Julie McKeehan and Neil Rhodes.
Last modified: 1 DEC 1996