CUE is a new data language, inspired by Go, that promises to make JSON, YAML, and other annoying formats much easier to work with. It features type checking, validation, and an excellent set of tooling.
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Go maps FAQ
What is a map in Golang and how does it work? Are Go maps thread-safe? Are maps pointers? How do you check if a map is empty? Can maps be nil? Go teacher and expert John Arundel answers these and other questions about Go maps.