Introduction In part 1 we took a high-level view on serialization and JSON. In this part, we’ll roll our sleeves and start working with JSON, focused on emitting JSON. You might think this is a basic topic, but there is much more to it than just calling json.Marshal. json.Marshal vs json.Encoder The encoding/json package has two main APIs: Marshal and NewEncoder. The Marshal function returns a []byte while the NewEncoder function will write to an io.

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Understanding the difference between json.Marshal and json.NewEncoder in Go, this post explores simple marshaling, using struct tags for custom JSON properties, and how to implement json.Marshaler for custom types. It also covers streaming JSON with JSON lines and chunked transfer encoding over HTTP.

The Fine Print: Part 2