encoder and decoder. This is an important thing that, IMHO, anyone
“We are always better with allies,” Warner said. “Unfortunately, this president has insulted virtually all of our allies.”
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This data structure comes from the Wikipedia page on mutual recursion, which itself cites course notes from an introduction to Standard ML by Robert Harper. I am not aware of practical reasons to choose this particular representation of trees over the alternatives, other than as an illustration of a language’s ability to support mutually recursive data. I find it unwieldy, which is why I chose to use it for this post.2
The OpenRouter reality check