Thanks all. This just highlights one of the nice things about Clojure to
me - the code gets out of the way to allow the algorithm to shine through.
Lovely.
By the way, this implementation is closest to my initial although I didn't
use juxt at the repl, but I did lose my repl history and can't recall what
I did.
For me personally, I am learning with each new post so please keep them
coming!
On Wednesday, November 20, 2013 1:26:43 AM UTC, Joshua Ballanco wrote:
>
> In an attempt to be slightly more "elegant" (whatever that means ;-) ):
>
> -----8<-----8<-----
>
> (def start [{:key 3 :value 10} {:key 6 :value 30}])
>
> (into [] (map (fn [[k v]] {:key k :value v})
> (merge
> (into {} (for [x (range 6)] {x nil}))
> (into {} (map (juxt :key :value) start)))))
>
>
> ;;=> [{:key 6, :value 30} {:key 0, :value nil} {:key 1, :value nil} {:key
> 2, :value nil} {:key 3, :value 10} {:key 4, :value nil} {:key 5, :value
> nil}]
>
> -----8<-----8<-----
>
> Cheers,
>
> Josh
>
>
> On Tuesday, November 19, 2013 at 2:00 PM, Jim - FooBar(); wrote:
>
> > On 19/11/13 11:29, Colin Yates wrote:
> > > In Java I would do something like:
> > >
> > > // create a convenient look up to avoid nasty N^2 lookups
> > > Map<Object, Object> keyToValue = new HashMap....
> > > for (Map<Object, Object> kvMap: kvSequence)
> > > keyToValue.put(kvMap.get("key"), kvMap.put("value"));
> > >
> > > List<Object> allKeys = calculateAllKeys();
> > >
> > > List<Map<Object, Object>> results = new Array....
> > > for (Object key: allKeys)
> > > Object result = keyToValue.get(key); // null is fine for missing keys
> > > results.put(key, result);
> > >
> > > return results;
> >
> >
> > this code doesn't do any sorting of keys so I'm not sure it would give
> > you the exact desired result you posted...
> >
> > Jim
> >
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