Let's hypothetically say I have a Ring application and I'm performing some
validation on the input map I receive as part of a POST request. The
validate function throws an exception if anything's wrong with the input.
The exception is caught in the middleware and turned into a 400 code
response.
I could do either:
(-> input
validate
save)
or I could do:
(do
(validate input)
(save input))
The former doesn't really buy me anything, since a new version of input
would never be returned by validate. It is however "side-effect free" in a
way?
The latter is probably less idiomatic, but makes it obvious that input is
not changing as part of the evaluation.
What would be the more elegant way of handling this? Is the do block
approach somehow inferior?
Thanks!
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