I think he was demonstrating function syntax. This shorter version also works: nip 'return /^var/.test(line)' An implicit return, added if the input doesn't m

I think he was demonstrating function syntax. This shorter version also works: nip 'return /^var/.test(line)' An implicit return, added if the input doesn't match /[function|return]/ would be nice, along with aliasing line as l, then you'd have: nip '/^var/.test(l)'