Just a few quick questions regarding the places code: 1. Is `?` like `if`? For me it says that it is an undefined identifier. 2. If I understand correctly, the place is looping and in each iteration is looks if there is a message on the channel, which matches something. Is this creating a lot of extra work for looking on the channel all the time? 3. What are `p`, `_i`, `_o` and `_e` doing? 4. Could I replace `set!-values` with a `let`?
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