A shell script to capitalize first and last characters of every word in given file

capitalize.sh

#!/bin/bash

#This script capitalizes the first and last letters of each word in infile and writes the output to outfile

#This regex matches first character of every word which is converted to uppercase by \u\1
sed -e 's/\b\(.\)/\u\1/g' infile > tmpfile
#This regex matches last character of every word which is converted to uppercase by \u\1
sed -e 's/\(.\)\b/\u\1/g' tmpfile > outfile
#Delete temporary file
rm tmpfile