Thanks for the suggestions, I am using this one from Raul for now: 3 :'X__y'"0 n
On Tue, Apr 21, 2009 at 8:01 PM, Oleg Kobchenko <[email protected]> wrote: > >> From: Eric Iverson <[email protected]> >> >> An array of object values that 'often' to be dealt with as an array is >> perhaps best implemented as a normal J array that is a global class object. >> This can be referenced directly as an array and then in each of the objects >> the object value is the index into the class array and you use simple >> accessor funtions. > > This could probably be illustrated with the Diagram > script, where there is an array of object item and > accessors to properties like Posistion, Name, Members, etc. > > http://www.jsoftware.com/jwiki/Scripts/Diagram > > ITEMS=: ,: 10 10;'Sample 1';<;:'one two' > ITEMS=: ITEMS,160 10;'Sample 2';<;:'three four five' > ITEMS=: ITEMS, 80 160;'Sample 3';<;:'six seven' > ITEMS=: ITEMS,250 160;'Sample 4';<;:'eight nine' > > item_pos=: 3 : '(y,."1 0]0){::ITEMS' > item_setpos=:4 : 'ITEMS=:(<x)(<y,0)}ITEMS' > item_name=: 3 : '(y,1){::ITEMS' > item_membs=: 3 : '(y,2){::ITEMS' > item_memb=: 3 : '((({.y),2);{:y){::ITEMS' > > > NB. get connector positions > > CONS=: 0 1,1 2,:1 3 > > ... =. item_pos CONS > > > NB. find item by hit test > > for_i. i.#ITEMS do. > P=. item_pos i > if. *./(P<M),M<P+IBSZ do. > ... > end. > end. > > > > >> On Mon, Apr 20, 2009 at 12:49 PM, Matthew Brand wrote: >> >> > If I have a simple class such as: >> > coclass 'example' >> > >> > create =: 3 : ' X =: y' >> > destroy =: codestroy >> > >> > And I make a list of new objects: >> > n =.'example' (conew~)"(1 0) i.4 >> > >> > n >> > +-+-+-+-+ >> > |4|5|6|7| >> > +-+-+-+-+ >> > >> > Then I can get at the X's inside each object like this: >> > X_4_ >> > 0 >> > X_5_ >> > 1 >> > >> > And like this: >> > v =. <":5 >> > X__v >> > 1 >> > >> > But how can I reconstruct the values of the X's from the list n? >> > >> > i.e., is there anything that looks like this? >> > (X__ )"0 n >> > 0 1 2 3 >> > >> > Presumably the code to call a method on each object would look the same? >> > >> > I.e if there was a method: getX =: 3 : 'X' >> > >> > then calling it would look like? >> > (getx__ )"0 n >> > ---------------------------------------------------------------------- >> > For information about J forums see http://www.jsoftware.com/forums.htm >> > >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm > > > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > -- http://www.ixquick.com/ Ixquick Protects Your Privacy! The only search engine that does not record your IP address. http://www.vivapalestina.org/ ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
