In the parse example if the parse fails would we end up with 4 more function cal... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		hakcermani on Jan 28, 2017 \| parent \| context \| favorite \| on: Java Without If In the parse example if the parse fails would we end up with 4 more function calls ? (rather than one if check and a bail out)

village-idiot on Jan 28, 2017 [–]

Any function like map or flatMap that only affects one side of the either is a no-op if the current value is the wrong side. It's a bit like calling map on an Optional::empty, a no-op.

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact