Okay, this is very confusing to me. If I try this:
(defn add-to-logged-in-registry [this-users-params]
(let [right-now (. (Date.) getTime)
new-user-entry (conj this-users-params { "updated" right-now })]
(swap! registry (fn [map-of-user-maps]
(conj map-of-user-maps {:hi new-user-entry})))))
and then at the REPL I:
who-is-logged-in.core> @registry
{nil {:last_name "777ch", :image "7777in.jpg", :username "7777ch",
:first_name "77777alle", "updated" 1350573104214}}
Here I am hard-coding a key called ":hi" and yet in the registry I still
see the top level key as "nil". What happened to the :hi? I was expecting:
{:hi {:last_name "777ch", :image "7777in.jpg", :username "7777ch",
:first_name "77777alle", "updated" 1350573104214}}
What am I not understanding?
On Thursday, October 18, 2012 10:47:25 AM UTC-4, Toby Crawley wrote:
>
> Does new-user-entry include a "username" entry that points to nil? get
> only uses default value if the key is not present:
>
> user=> (get {:x nil} :x :not-found)
> nil
> user=> (get {:x nil} :y :not-found)
> :not-found
> user=> (or (get {:x nil} :x) :not-found)
> :not-found
> user=>
>
> On Oct 18, 2012, at 10:11 AM, larry google groups
> <lawrenc...@gmail.com<javascript:>>
> wrote:
>
> >
> > I have some Javascript on a website that pings my Clojure app. My app
> adds in the user info like this:
> >
> > (defn add-to-logged-in-registry [this-users-params]
> > "We assume some user is looking at a site such as wpquestions.com and
> the Javascript on that site is sending an Ajax request to this app, every
> 10 seconds, with a map of information about the user, which we need to
> store in the registry."
> > (let [right-now (. (Date.) getTime)
> > new-user-entry (conj this-users-params { "updated" right-now })]
> > (swap! registry (fn [map-of-user-maps]
> > (assoc (assoc map-of-user-maps (get new-user-entry
> "username" "anonymous") {}) (get new-user-entry "username" "anonymous")
> new-user-entry)))))
> >
> > I wanted to get a map inside of a map like this:
> >
> > {:lawrence {:last_name "Krubner", :image "ziggy_stardust.jpg", :username
> "lawrence", :first_name "Lawrence", "updated" 1350568598742}}
> >
> > instead I get:
> >
> > {nil {:last_name "Krubner", :image "ziggy_stardust.jpg", :username
> "lawrence", :first_name "Lawrence", "updated" 1350568598742}}
> >
> > How can I get the username as the top level key, instead of "nil"?
> >
> >
> >
> > --
> > You received this message because you are subscribed to the Google
> > Groups "Clojure" group.
> > To post to this group, send email to clo...@googlegroups.com<javascript:>
> > Note that posts from new members are moderated - please be patient with
> your first post.
> > To unsubscribe from this group, send email to
> > clojure+u...@googlegroups.com <javascript:>
> > For more options, visit this group at
> > http://groups.google.com/group/clojure?hl=en
>
>
--
You received this message because you are subscribed to the Google
Groups "Clojure" group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
