1. Re: we need official libs : Swap
Yeah, and we can write wrappers for functions like get_position().
But this only sounds like a hack for the problems we currently face.
global function get_position_x()
sequence temp
temp = get_position()
return temp[1]
end function
global function get_position_y()
sequence temp
temp = get_position()
return temp[2]
end function
Lucius L. Hilley III
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> ---------------------- Information from the mail
header -----------------------
> Poster: Lewis Townsend <keroltarr at HOTMAIL.COM>
> Subject: Re: we need official libs : Swap
> --------------------------------------------------------------------------
-----
>
> Lionel Wong wrote:
>
> >As mentioned in the reference manual, subscripting expressions is not
> >supported because that would wastefully discard some already calculated
> >values. There is a purpose for value() to return more than the result
> >called
> >for: error-handling. The correct use of value() would be--
> >
> >include get.e
> >sequence getval
> >atom num
> >getval = value("7")
> >if getval[1] = GET_SUCCESS
> > then num = getval[2]
> > else .... -- handle the invalid crap that obviously wasn't "7"
> >end if
> >
> >Lionel Wong
>
> Yes, and that is how I do it unless I'm wanting a
> quick sthortcut to get a number. Notice that the
> "correct" example you gave requires 2 variables and
> 2 instances of subscripting where as my suggested
> example would only requre one variable and only need
> to be subscripted once because it could be done at
> the function call. I suppose I can always make my
> own shortcut-value-function this way:
>
> function val (sequence s)
> sequence getval
> getval = value (s)
> return getval [2]
> end function
>
> or even one that does the error handling for me:
>
> function val (sequence s)
> sequence getval
> getval = value (s)
> if getval [1] = GET_SUCCESS then
> return getval [2]
> else
> puts (1, "\nError using value()")
> abort (1)
> end if
> end function
>
> Then all I have to do is something like:
> num = val("7")
>
> later
> Lewis Townsend
>
>
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