Curriculum Idioms & ecosystem Defer exercise 1 · mcq
Defer
defer schedules a function call to run when the
enclosing function returns. Pick the line that defers a
call to cleanup().
TypeScript: try { ... } finally { cleanup(); } — same
idea, no extra indentation in Go.
TypeScript reference
About this theme
defer fn() schedules fn to run when the surrounding function returns. The closest TS analogue is a try/finally you don't have to indent. Multiple defers run LIFO. Arguments are evaluated at the defer site, not at the call site — a common surprise. Also: defer in a loop accumulates.