Array destructuring appears to provide what you want with respect to nils
(note the extra set of square braces within the argument list):
(defn make-map
[[fullname lastname firstname middlename]]
{:fullname fullname
:lastname lastname
:firstname firstname
:middlename middlename})
(make-map ["John Lou Doe" "Doe" "John" "Lou"])
;=> {:fullname "John Lou Doe", :lastname "Doe", :firstname "John",
:middlename "Lou"}
(make-map ["John Lou Doe" "Doe" "John"])
;=> {:fullname "John Lou Doe", :lastname "Doe", :firstname "John",
:middlename nil}
(make-map ["John Lou Doe" "Doe"])
;=> {:fullname "John Lou Doe", :lastname "Doe", :firstname nil, :middlename
nil}
(make-map ["John Lou Doe"])
;=> {:fullname "John Lou Doe", :lastname nil, :firstname nil, :middlename
nil}
(make-map [])
;=> {:fullname nil, :lastname nil, :firstname nil, :middlename nil}
(make-map nil)
;=> {:fullname nil, :lastname nil, :firstname nil, :middlename nil}
On Sunday, June 1, 2014 12:09:35 PM UTC-4, Glen Rubin wrote:
>
> I am doing some text processing using clojure and attempting to extract a
> person's name by regex and then assign it to a map. The result I get takes
> one of several forms:
>
> nil (if i can't find the name)
>
> [fullname]
>
> [fullname lastname]
>
> [fullname lastname firstname]
>
> [fullname lastname firstname middlename]
>
> now, basically want to assign these entries to a map like so {:fullname
> "some name", :lastname "some name", etc...}
>
> if there is no entry than I would like to assign it as nil, e.g.
> {:fullname nil, lastname nil, etc...}
>
> I want to code this in the most proper way. I am thinking I need to
> define a function that works differently based on how long the vector is?
> How do I turn the contents of the vector into function arguments?
>
> Thanks!
>
>
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