Colorful numbers: Difference between revisions

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 All colorful candidates larger than 1 digit must be a permutation of digits [2,3,4,5,6,7,8,9], so test only those:
 <syntaxhighlight lang="ruby">def colorful?(ar)
-    prods = []
+  products = []
-    (1..ar.size).all? do |chunk_size|
+  (1..ar.size).all? do |chunk_size|
-        ar.each_cons(chunk_size) do |chunk|
+    ar.each_cons(chunk_size) do |chunk|
-            product = chunk.inject(&:*)
+      product = chunk.inject(&:*)
-            return false if prods.include?(product)
+      return false if products.include?(product)
-            prods << product
+      products << product
-        end
     end
+  end
 end
-less100 = (0..100).select{|n| colorful?(n.digits)}
+below100 = (0..100).select{|n| colorful?(n.digits)}
-puts "The colorful numbers less than 100 are:\n #{less100.join(" ")}"
+puts "The colorful numbers less than 100 are:\n #{below100.join(" ")}", ""
-puts "\nLargest colorful number: #{(98765432.downto(1).detect{|n| colorful?(n.digits) })}", ""
+puts "Largest colorful number: #{(98765432.downto(1).detect{|n| colorful?(n.digits) })}", ""
 total = 0