vim <=> ls: to relieve a common command typo headache when working in terminal

vim-ls.sh

# This contains two files.. the ls proxy and the vim proxy
# Problem I wanted to solve:
#   when working in terminal, sometimes I mistake ls with vim, or vice versa, when I
#   am inspecting a directory recursively. When this happens, I have to retype the
#   command. Yes, '!$' helps me to re-use the previous argument, but I still wish the
#   experience could be smoother.
# Solution:
#   make ls and vim interchangeable by delegating ls and vim to proxy scripts, and set
#   alias 'ls' and 'vim' to these scripts.

### ls.sh -- the ls proxy

#!/usr/bin/env sh
if [ $# -eq 1 ] && [ -f $1 ]; then
    read -p "'ls' => 'vim'? [y/N] " consent
    case $consent in
        [Yy])
            vim $1
            break
        ;;
        *)
            exit 1
        ;;
    esac
else
    ls -G $@ # -G: color
fi

### vim.sh -- the vim proxy
#!/usr/bin/env sh
if [ $# -eq 1 ] && [ -d $1 ]; then
    read -p "'vim' => 'ls'? [y/N] " consent
    case $consent in
        [Yy])
            ls -G $1 # -G: color
            break
        ;;
        *)
            exit 1
        ;;
    esac
else
    vim $@
fi