Editing string variables

honoluludesktop

If I have a variable "mat" that is a string "FileName.Dxf", how do I edit the variable to remove ".Dxf"

           
unless mat.nil?
   if e.is_a? Sketchup;;ComponentInstance or e.is_a? Sketchup;;Group then
      #String editing to remove ".Dxf" here
      e.material = mat
   end
end

Does my question make sense?

thomthom

For files there's a separate method for that: File.basename


unless mat.nil?
   if e.is_a? Sketchup;;ComponentInstance or e.is_a? Sketchup;;Group then
      #String editing to remove ".Dxf" here
      mat = File.basename(mat, ".Dxf")
      e.material = mat
   end
end

thomthom

Alternatively, if the file type isn't always known:


unless mat.nil?
   if e.is_a? Sketchup;;ComponentInstance or e.is_a? Sketchup;;Group then
      #String editing to remove ".Dxf" here
      mat = mat.split('.').first
      e.material = mat
   end
end

honoluludesktop

Thanks, I am coding a plugin that allows me to texture imported components (dxf files) by applying a texture of a similar name to the imported component's name. In other words a imported component named "roof.dxf", will be textured by a material named "roof".

thomthom

Does it work to set entity.material = "stringName" ?

honoluludesktop

Thomas, This is my first real attempt to understand ruby, so far its not working. Thanks for the help, I'll get it eventually.

honoluludesktop

WooPee!! Got it. Ruby is case sensitive, and I was attempting the string conversion in the wrong place.

# Loop through entities & apply material based on layer name
 Sketchup.active_model.entities.each do |e|
     begin#if here found
        #10/30/09 ignore file extention name start
        stuff=e.definition.name
        stuff=stuff.split('.').first
        mat = su_materials[stuff]
        #mat = su_materials[e.definition.name]#original
        #end
     rescue#else if here not found
         mat = su_materials[e.name]
     end#end if

Can't get over not having to declare variables. Dangerous for guys like me.

MartinRinehart

The general way to do string fiddling in Ruby is via RegEx and it's not that hard:


x = 'asdf.wer'

# match string to regex; string =~ regex
# regex; '/'...'/'
# match into $1 and $2; string =~ /(...)(...)/

x =~ /(.*)\.(.*)/ # match (any number of any char)a period(more chars)

puts $1 # 'asdf'
puts $2 # 'wer'

thomthom

Plus, regex can handle the Unicode data from Sketchup, which SU's Ruby doesn't.