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You can learn from the Go codebase to get a feel of why this is useful: https://github.com/golang/go/blob/master/src/cmd/go/internal/modfetch/repo.go#L394 http

You can learn from the Go codebase to get a feel of why this is useful: https://github.com/golang/go/blob/master/src/cmd/go/internal/modfetch/repo.go#L394 https://github.com/golang/go/blob/master/src/cmd/go/internal... https://github.com/golang/go/blob/master/src/io/fs/fs.go#L262 https://github.com/golang/go/blob/master/src/io/fs/fs.go#L26... https://github.com/golang/go/blob/master/src/errors/wrap.go#L18 https://github.com/golang/go/blob/master/src/errors/wrap.go#... https://github.com/golang/go/blob/master/src/go/parser/resolver.go#L49 https://github.com/golang/go/blob/master/src/go/parser/resol...

metadat 2y ago
If the interface check fails, does the code panic or does the `ok' value just get set to false? If `ok' gets set to false, that seems optimal. Pretty neat, in fact, what other language permits such low-key, easy runtime interface checks?
- 38 2y ago
  this will panic: v := hello.(world) this never panic: v, ok := hello.(world) and yes, its awesome. people rag on Go because BLARG ERRORS BOILERPLATE, but if you can get over that Go is not Python/JavaScript, you're left with a simple powerful language