Go Community Linklog
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When to use Defer in Go
Defer is a powerful control flow mechanism that is unique to Go (at least until Swift 2.0 added it). It allows you to defer a function call to the end of the currently executing function no matter how or where it returns. This is useful for many reasons, the most common of which are to close an open connection or unlock a Mutex immediately before the function ends.
Posted by: Brian Scott