HammingDifference.ps1 in trackler-2.2.1.170

- old
+ new

@@ -1,27 +1,54 @@
 function Get-HammingDifference([string]$strand1, [string]$strand2) {
+    <#
+    .SYNOPSIS
+    Calculate the Hamming difference between two DNA strands.
+    
+    .DESCRIPTION
+    By counting the number of differences between two homologous DNA strands
+    taken from different genomes with a common ancestor, we get a measure of
+    the minimum number of point mutations that could have occurred on the
+    evolutionary path between the two strands.
+
+    This is called the 'Hamming distance'.
+
+    It is found by comparing two DNA strands and counting how many of the
+    nucleotides are different from their equivalent in the other string.
+    
+    .PARAMETER strand1
+    The first DNA strand
+    
+    .PARAMETER strand2
+    The second DNA strand
+    
+    .EXAMPLE
+    Get-HammingDifference -strand1 "GAGCCTACTAACGGGAT" -strand2 "CATCGTAATGACGGCCT"
+    
+    This will return a difference of 7.
+    #>
+    
     Throw "Exercise not implemented"
 }