My .bashrc File (Mac)

.bashrc

# ~/.bashrc

#----------------
# Aliases
#----------------

# Prompt overwrites
alias rm='rm -i'
alias cp='cp -i'
alias mv='mv -i'

# Show hidden files
alias la='ls -a'

# Show files and permissions
alias ll='ls -l'


#----------------
# Functions
#----------------

# Create a directory and immediately enter it
function mkcd() {
  if [ ! -n "$1" ]; then
    echo "Enter a directory name"
  elif [ -d $1 ]; then
    echo "\`$1' already exists"
  else
    mkdir $1 && cd $1
  fi
}

# Enter a directory and list the contents
function cs() {
  cd "$1" && ls
}

# Enter a directory and list the contents (include hidden)
function ca() {
  cd "$1" && ls -a
}

# Enter a directory and list the contents with permissions
function cl() {
  cd "$1" && ls -l
}

# Extract compressed files of various formats with 1 command
function extract() {
  if [ -f $1 ] ; then
    case $1 in
      *.tar.bz2)   tar xvjf $1     ;;
      *.tar.gz)    tar xvzf $1     ;;
      *.bz2)       bunzip2 $1      ;;
      *.rar)       unrar x $1      ;;
      *.gz)        gunzip $1       ;;
      *.tar)       tar xvf $1      ;;
      *.tbz2)      tar xvjf $1     ;;
      *.tgz)       tar xvzf $1     ;;
      *.zip)       unzip $1        ;;
      *.Z)         uncompress $1   ;;
      *.7z)        7z x $1         ;;
      *)           echo "'$1' cannot be extracted via >extract<" ;;
    esac
  else
    echo "'$1' is not a valid file"
  fi
}

# Display files in Quick Look
function ql() {
  (qlmanage -p "$@" > /dev/null 2>&1 &
  local ql_pid=$!
  read -sn 1
  kill ${ql_pid}) > /dev/null 2>&1
}

# Display any filetype as plain text in Quick Look
function qlt() {
  (qlmanage -p -c public.plain-text "$@" > /dev/null 2>&1 &
  local ql_pid=$!
  read -sn 1
  kill ${ql_pid}) > /dev/null 2>&1
}