a shell command alias to convert a number to different base easily

baseconverter_for_alias

# copy to your bash_profile or somewhere you write aliases,
# then you can convert a number to different base by cbase
# エイリアスを設定しているあたりにでも以下のコードをコピペすると基数変換がcbaseコマンドで簡単できるようになります
function cbase() {
  function echo_usage() {
    cat << USAGE
usage: cbase [-i num] [-o num] num
  -i num
    Set a number of base you want to convert FROM.
    Default is 10.
  -o num
    Set a number of base you want to convert TO.
    Default is 10.
USAGE
  }

  local OPTIND OPT OPTERR input output
  while getopts "i:o:" OPT; do
    case "$OPT" in
      i) input="$OPTARG" ;;
      o) output="$OPTARG" ;;
    esac
  done
  shift $(($OPTIND - 1))

  [ -z "$input" -a -z "$output" ] && echo_usage

  [ -z "$input"  ] && input=10
  [ -z "$output" ] && output=10
  echo "obase=$output; ibase=$input; $1" | bc
}