No, he is trying to demonstrate how to use 'xargs node -e'.
Are you even reading this discussion properly or are you just searching for some shell snippets and ridicule them as soon as you get a chance? This is what it looks like from your history: http://news.ycombinator.com/threads?id=uselessuseof
same result as with xargs
grep petard /usr/share/dict/words
same result as with xargs
not sure what you are trying to demonstrate here
useless use of xargs?