Thread: Lua noob

hello writing lua script aegisub have problems language. used coding in c++ only(as hobby) , can't figure out many things in lua. error in line 11 of script. message aegisub this: [string "remove_unused_styles.lua"]:11: attempt length of local 'styles' (a nil value)

here relevant link on aegisub forum: http://forum.aegisub.org/viewtopic.php?f=5&t=2944

, here code:

code:

    script_name = "remove unused styles"      --script_description = "displays dialog let's user decide unused styles remove."      script_description = "scan , remove unused styles"      script_author = "sledgehammer_999"      script_version = "1.00"        function remove_unused_styles_macro(subtitles, selected_lines, active_line)         local styles            = 1, #subtitles            if subtitles[i].class == "style"               styles[#styles + 1].name = subtitles[i].name               styles[#styles + 1].index =            end         end                  --styles definitions collected         --now let's go on dialogue lines , see ones used         = 1, #styles            k = 1, #subtitles               styles[i].used = false               if subtitles[k].class == "dialogue" , subtitles[k].style == styles[i].name                  styles[i].used = true                  break               end                     end         end                  --at point have marked unused styles         --todo: display dialog , let user decide ones remove. don't know how determine optimal size of controls.                  --remove unused styles.         local styles_index         --this loop redundant. incorporated above, it's placed here when dialog implemented.         = 1, #styles            if styles[i].used == false               styles_index[#styles_index + 1] =            end         end                  --now have unused styles let's remove them , make , undo point         subtitles.delete(unpack(styles_index))         aegisub.set_undo_point(script_name)      end        aegisub.register_macro(script_name, script_description, remove_unused_styles_macro)

try initializing "styles" table:

code:

local styles = {}

http://www.lua.org/pil/11.1.html

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