1. Please supply subjects !!!
- Posted by Lucius L Hilley III <luciuslhilleyiii at JUNO.COM> Apr 15, 1997
- 782 views
- Last edited Apr 16, 1997
On Tue, 15 Apr 1997 04:20:46 GMT Mike Fowler <stoner at NELSUN.GEN.NZ> writes: SORRY no time to CUT > >hi all > >im having a bit of trouble... > >i am writing a programme that has mouse buttons in it, and the x and y >co-ord's of the buttons are stored in the sequence mb like: > >mb = append(mb, {x1, y1, x2, y2, "button_name", button_signature} > >so when the user clicks the mouse, it quickly searches to see if that >mouse click was in the area specified in mb[1] (or mb[whatever]) > >that's all okay, BUT... if I try: > >mb = {} > >i get an error and it wont do it. Any ideas?? > >Thanks :) > >Mike Fowler - mike.fowler at nelsun.gen.nz Suggestion. {} is a zero length sequence. if mb = {} then ? mb[1] will give an error of subscript out of bounds in sequence Your check routine should be built similiar to the following. if length(mb) > 0 then If mb[1] then do something using mb[1] and so on.... end if end if ENJOY !!! --Lucius Lamar Hilley III -- E-mail at luciuslhilleyiii at juno.com -- I support transferring of files less than 60K. -- I can Decode both UU and Base64 format.