Bash lk: call `less` or `ls -l` depending on context

lk.bash

# Bash function that calls `less` and `ls -l` depending on whether
# the target is a file or a directory. Surprisingly pleasant to use.
function lk {
    local p
    if [[ $# -lt 1 ]] ; then
        p='.'
    else
        p="$1"
    fi

    if [[ -d $p ]] ; then
        ls -l -h "$p"
    else
        less "$p"
    fi
}