September 2017 Update

Task/Digital-root-Multiplicative-digital-root/Sidef/digital-root-multiplicative-digital-root.sidef

@@ -1,23 +1,22 @@
 func mdroot(n) {
   var (mdr, persist) = (n, 0)
   while (mdr >= 10) {
-    mdr = mdr.digits.product
+    mdr = mdr.digits.prod
     ++persist
   }
   [mdr, persist]
 }
 
 say "Number: MDR  MP\n======  ===  =="
-[123321, 7739, 893, 899998].each{|n| "%6d: %3d %3d\n" \
+[123321, 7739, 893, 899998].each{|n| "%6d: %3d %3d\n" \
                            .printf(n, mdroot(n)...) }
 
 var counter = Hash()
 
-Inf.times { |i|
-  var j = i-1
-  counter{mdroot(j).first} := [] << j
+Inf.times { |j|
+  counter{mdroot(j).first} := [] << j
   break if counter.values.all {|v| v.len >= 5 }
 }
-
+ 
 say "\nMDR: [n0..n4]\n===  ========"
-10.times {|i| "%3d: %s\n".printf(i-1, counter{i-1}.first(5)) }
+10.times {|i| "%3d: %s\n".printf(i, counter{i}.first(5)) }