<elliott> addquote <Edwin Brady> Just seen this comment on reddit: "Parallel programming has been a solved problem for decades." I might have to stop reading the internet.

#!/bin/sh
allquotes | if [ "$1" ]; then
    if expr "$1" + 0 >/dev/null 2>&1; then
        sed "$1q;d"
    else
        grep -P -i -- "$1"
    fi
else shuf -n 1; fi