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I think much of the official "rust-by-example" would benefit from using the rust playground instead of the printed examples.

All code blocks in rust by examples can be edited and have a play button.

And most of that cannot be run on playground because of incomplete source code, missing dependency or wrong configuration.

That has to do with the contents, not the playground.

Also, many examples have hidden context that if you open the example in the playground, you’ll see and will make compile.