Control of input parameters in prgms./fns.

[John P]

Is there any way, inside a program/function in HP Prime, to tell haw many input parameters were passed and modify the prgm./fn. behavior accordingly. As far as I know if you declared 3 parameters and enter while running the prgm./fn. two or one you will get error.
Thanks.

[eried]

No way, there is no http://en.wikipedia.org/wiki/Polymorphis...r_science)

[Han]

(12-27-2013 02:26 AM)John P Wrote:  Is there any way, inside a program/function in HP Prime, to tell haw many input parameters were passed and modify the prgm./fn. behavior accordingly. As far as I know if you declared 3 parameters and enter while running the prgm./fn. two or one you will get error.
Thanks.

One idea would be to pass a single input -- a list. The list itself can contain however many objects (parameters) you want. You just need to add code to parse the list according to your needs.

[eried]

Other option is if TW adds optional parameters

Code:

EXPORT Name(required_var, required_var, optional_var=default, optional_var=default)
BEGIN
...

[John P]

Thank you all. I was thinking about adding one more real number parameter and the prgm. would check. If it would be for ex. 2 the program would use the two parameters I want and if it would be 1 prgm. would use one parameter etc.

[John P]

(12-27-2013 04:34 AM)Han Wrote:  

(12-27-2013 02:26 AM)John P Wrote:  Is there any way, inside a program/function in HP Prime, to tell haw many input parameters were passed and modify the prgm./fn. behavior accordingly. As far as I know if you declared 3 parameters and enter while running the prgm./fn. two or one you will get error.
Thanks.

One idea would be to pass a single input -- a list. The list itself can contain however many objects (parameters) you want. You just need to add code to parse the list according to your needs.

I am re-asking the same question for the newest firmware. I dreamed that it changed. Did my dream come true or it is back to the same old reality.
Thanks for replays.

[cyrille de brébisson]

hello,

Nope, sorry, no changes there...
using a list is still the only solution.
or having multiple functions, with slightly different names and different number of parameters.


PPL does not yet implement default parameters, nor var-args, not overloading...

Cyrille

[John P]

(06-06-2014 08:11 AM)cyrille de brébisson Wrote:  hello,

Nope, sorry, no changes there...
using a list is still the only solution.
or having multiple functions, with slightly different names and different number of parameters.


PPL does not yet implement default parameters, nor var-args, not overloading...

Cyrille

Thank you.