Go 1.21

Find the First Matching Slice Element in Go with slices.IndexFunc

Searching a slice is easy when the element itself is comparable and you already know the exact value. Real programs often need something slightly different: the first queued job, the first expired token, or the first record whose normalized name matches some input. slices.IndexFunc handles that case directly. You provide a predicate, and it returns the index of the first element for which that predicate is true. If nothing matches, it returns -1.