Hey,

Both myself and my brother do a fair amount of validating maps of data
in our day jobs (EXCITE!) so we put together a library a while ago to
help out. We just got round to releasing 1.0.0 recently so thought I
would announce it here in case anyone else is interested:

https://github.com/mikejones/mississippi

Basic usage is like:

user> (use 'mississippi.core)
user> (def subject {:a nil :b 1})
user> (def validations {:a [(comp not nil?) :msg "required"]
                                 :b [number? :msg "not numeric"]})
user> (validate subject validations)
{:a nil, :b 1, :errors {:a ("required")}}

It's fairly simple and there are more examples of other features and
built-in validators in the README on the homepage, along with
installation instructions etc. Hope others may find it useful.

Cheers,

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