OpenEuphoria

Re: another newbie question

• Posted by bytebrain <bytebrain at MINDSPRING.COM> Aug 30, 1999
• 473 views

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Hi Kat, you wrote on 8/30/99 1:27:32 PM:
>. . .but for now, how do i avoid the following error msg with a
>test
>preceeding the print statement=3F
>
>printf(1,"%s\n", {sentword[2]} )
>-- prints: sequence found inside character string

What about using this function to test beforehand:

function simpleSequence(object x)
-- returns 1 if x is sequence w/ no subsequences
--         0 otherwise
    if atom(x) then
        return 0
    else
        for element =3D 1 to length(x) do
            if not atom(x[element]) then
                return 0
            end if
        end for
    end if
return 1
end function


> . . . It seems to me i need
>another sequence (or another field inside {sentword}.) to
>record what in
>{sentword} is a sequence and what is a nested sequence.

Try mapping it with something like this:

global function objectOverview(object x)
-- if x is an atom, the return sequence will be an atom (0),
-- else it will be a sequence of one letter codes corresponding
-- to the top level elements of sequence x:
-- 0 =3D element is an atom
-- 1 =3D element is a simple sequence
-- 2 =3D element is a sequence containing further sequences
-- The first element of the map returned will be the length of the
-- sequence x, so that you have:
--  { <length>, <first element category>, <second element category>, . . . }
--
-- EX: objectOverview( {5, "hi!", 78, { 9, {5} }, {}, {{}} } )
--    should return {6, 0,   1,    0,     2,       1,   2}
--
object map
integer subElement
    if atom(x) then
        map =3D 0
    else
        map =3D {length(x)}
        for element =3D 1 to length(x) do
            if atom(x[element]) then
                map &=3D 0
            else
                map &=3D 1
                subElement =3D 1
                while subElement <=3D length(x[element]) do
                    if sequence(x[element][subElement]) then
                        map[length(map)] =3D 2
                        exit
                    end if
                    subElement +=3D 1
                end while
            end if
        end for
    end if

return map
end function
--------------------------------------------------------------
--------------------------------------------------------------
If the above is overkill or going off on a tangent (or both),
my apologies.  If the above is underkill, you could alter
objectOverview() to recurse into the object and create a
map complete to whatever level you wanted.  Parsing that sort
of map, however, might be just about as complex as parsing the
sequence to begin with.

Craig
-------bytebrain at mindspring.com--------
"Obvious" is the most dangerous word in
mathematics.
--Eric Temple Bell

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