Solved hamming in Bash

bash/hamming/hamming.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+if [[ $# -ne 2 ]]; then
+  echo "Usage: $0 <string1> <string2>"
+  exit 1
+fi
+
+array1=$1
+array2=$2
+cnt=0
+for i in $(seq 0 $((${#array1} - 1))); do
+  if [[ "${array1:$i:1}" != "${array2:$i:1}" ]]; then
+    cnt=$((cnt + 1))
+  fi
+done
+
+if [[ ${#array1} == ${#array2} ]]; then
+  echo $cnt
+else
+  echo "strands must be of equal length"
+  exit 1
+fi