September 2017 Update

Task/Map-range/PowerShell/map-range-1.psh

@@ -0,0 +1,36 @@
+function Group-Range
+{
+    [CmdletBinding()]
+    [OutputType([PSCustomObject])]
+    Param
+    (
+        [Parameter(Mandatory=$true,
+                   Position=0)]
+        [ValidateCount(2,2)]
+        [double[]]
+        $Range1,
+
+        [Parameter(Mandatory=$true,
+                   Position=1)]
+        [ValidateCount(2,2)]
+        [double[]]
+        $Range2,
+
+        [Parameter(Mandatory=$true,
+                   ValueFromPipeline=$true,
+                   Position=2)]
+        [double]
+        $Map
+    )
+
+    Process
+    {
+        foreach ($number in $Map)
+        {
+            [PSCustomObject]@{
+                Index   = $number
+                Mapping = $Range2[0] + ($number - $Range1[0]) * ($Range2[0] - $Range2[1]) / ($Range1[0] - $Range1[1])
+            }
+        }
+    }
+}

Task/Map-range/PowerShell/map-range-2.psh

@@ -0,0 +1 @@
+0..10 | Group-Range (0,10) (-1,0)