Parse through command line arguments

parse.sh

#!/usr/bin/env bash

# Parse command line arguments in a pattern like --flag value 

while (( "$#" )); do
  case "$1" in
    -f|--flag)
      statement
      shift 2 
      ;;
  esac
done


# Parse command line arguments in a pattern like flag=value

for i in "$@"
do
case $i in
    -f|--flag)
    variable=${i#*=}   # variable=value
    shift
esac
done