If you have a chain of single-argument functions and you want to do something
side-effectful in the middle of the chain with just the input at that point in
the chain, you can make a function that converts a void-returning function into
a function that returns its argument:
(define ((side-effec
This might not be a good fit for threading macros.
If you need to calculate some extra, intermediate values, I
definitely wouldn't recommend `set!`-ing them on the side in a
threading macro (if that's what you had in mind).
Threading macros produce a single value.
If you need to produce multiple
The simplest solution occurred to me after a few minutes - a separate function
that ignores the first value (or the last with ~>> )
But I'm still wondering if there's a provision for this in the macro.
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