March 2014 update

Task/Hailstone-sequence/PowerShell/hailstone-sequence.psh

@@ -0,0 +1,26 @@
+# Author M. McNabb
+function Get-HailStoneBelowLimit {
+param($UpperLimit)
+    begin {
+        function Get-HailStone {
+        param($n)
+           switch($n) {
+              1              {$n;return}
+              {$n % 2 -eq 0} {$n; return Get-Hailstone ($n = $n / 2)}
+              {$n % 2 -ne 0} {$n; return Get-Hailstone ($n = ($n * 3) +1)}
+           }
+        }
+        $Counts = @()
+    }
+
+    process {
+        for ($i = 1; $i -lt $UpperLimit; $i++) {
+            $Object = [pscustomobject]@{
+                'Number' = $i
+                'Count' = (Get-HailStone $i).count
+            }
+            $Counts += $Object
+        }
+    }
+    end {$Counts}
+}