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I have worked in outsourced projects for a big company in the past and our team got the work done. I have since then started my own company and have been working for US customers f…

Yes. It won't compile. This check is not really needed as the code would fail when a function which accepts scan.Writer would fail (compilation) if ColumnWriter is sent and if it d…

This is how you can make sure that a struct implements an interface. The line 'var _ scan.Writer = (*ColumnWriter)(nil)' assigns a nil pointer of the struct to a scan.Writer interf…

It is a perfectly reasonable way to test for interfaces. A single struct may satisfy a hundred interfaces which it doesn't even know about, this is actually one of the best traits …