Pattern matching for map content

[Michael Jaaka]

Hi!

Pattern matching is fine for sequence or vector destruction.

Is is possible to destruct map and make pattern machting?

For example I would like to make constraint for to some query service.

It would be done as map for example:  { :name "Tom" :surname "Jakarta" :birthDate (Date.) } or { :personalId "12312312132" }

Then I would like to dispatch this Value Object:

(defn service

  ([ {:keys [name surname]} ] (println "searching by personal data"))

 ([{:keys [personalId]} ] (println "searching by id")))

Why using map instead of specific type of VO?

Because I don't want to decleare types of VO which doesn't bring any value to domain problem.

Maybe matchure or other lib already implements it?

[Ben Smith-Mannschott]

Clojure provides only destructuring, not pattern matching. (It's my
impression that Rich is not a fan of mixing destructuring with control
flow implied by pattern matching.)

If you want pattern matching, matchure seems like just what you need.
For your particular example, take a look at matchure's defn-match.

https://github.com/dcolthorp/matchure

// Ben

[Alex Ott]

it's better to use https://github.com/clojure/core.match

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[Ben Smith-Mannschott]

On Tue, Oct 25, 2011 at 15:33, Alex Ott <ale...@gmail.com> wrote:
> it's better to use https://github.com/clojure/core.match

Thanks, I'd forgotten about core.match.

// ben

[Michael Jaaka]

Thx, this is exactly what I need.