lib/tafel.rb in tafel-1.0.0 vs lib/tafel.rb in tafel-1.0.1

@@ -23,11 +23,11 @@
 #++
 
 
 module Tafel
 
-  VERSION = '1.0.0'
+  VERSION = '1.0.1'
 
   def self.table?(o)
 
     o.is_a?(Array) && o.all? { |r| r.is_a?(Array) }
   end
@@ -102,10 +102,12 @@
 
     a = Array.new(h) { Array.new(w) }
 
     iterate(ss) do |x, y, s|
 
+      next unless s
+
       left = x > 0 ? ss[y][x - 1] : nil
       above = y > 0 ? ss[y - 1][x] : nil
 
       woff = left ? left[2] + left[0] : 0
       hoff = above ? above[3] + above[1] : 0
@@ -120,11 +122,15 @@
 
   protected # well...
 
   def self.size(o)
 
-    table?(o) ? [ o.collect { |r| r.size }.max, o.size ] : [ 0, 0 ]
+    if table?(o) && o.any?
+      [ o.collect { |r| r.size }.max, o.size ]
+    else
+      [ 0, 0 ]
+    end
   end
 
   def self.copy(target, woff, hoff, source)
 
     if table?(source)
@@ -138,10 +144,10 @@
 
     table.first.size.times do |x|
       table.size.times do |y|
         yield(x, y, table[y][x])
       end
-    end
+    end if table.any?
   end
 
   def self.narrow_class(x)
 
     return Array if x.is_a?(Array)