I tried it with doseq many times, but the behvior is the same. In the
REPL I got a full map of information, but when I use the program the map
with the agent logs is empty.
Am 22.04.2012 19:51, schrieb Moritz Ulrich:
Just a quick guess after a quick glimpse at the code you linked:
(map #(send % a-day-in-the-life-agent-fn) domiciles)
map is lazy. It doesn't execute anything until you request the result.
(do ... (map ...) (foo)) discards the result of map, making it a
no-op.
This also explains why it works in the repl: It prints out the result
of the call. In an (implicit) do, it doesn't.
Use doseq in such situations.
On Sun, Apr 22, 2012 at 16:52, Goldritter
<marcus.goldritter.lind...@googlemail.com> wrote:
I wanted to log some information during the execution of the genetic
algorithm I posted earlier here. So I chnaged the code and changed the
function 'track-evolution' so, that it now accept a maximal runtime and
returns a map which contains the logged information.
The information where stored first as states in the agents which take part
in this algorithm as a Map, which has as key the time, when the function is
started and as value the information how long it takes to finishes the
function and if there was an exception in the agent.
When 'track-evolution' finishes, it retrieves the states of the agents and
put these map into an other map with more infomrations and then returns the
map.
When I write the following code into the REPL:
=> (prepare-evolution 3) (start-evolution) (def stat (track-evolution 5
:second))
(:creator-log stat)
Then I get as result
=> {"593848" {<Map of the Agent>}, "9db6ff" {<Map of the Agent>}, "d03269"
{<Map of the Agent>}}
(<Map of the Agent> is the Map with the information I described above).
To make it easier I wrote a function which I want to execute
(defn retrieve-new-stats
[number-of-creators time timetype]
(prepare-evolution number-of-creators)
(start-evolution)
(track-evolution time timetype))
And when I use this function
=>(def stat (retrieve-new-stats 3 5 :second))
I get as result for '(:creator-log stat)' this:
{"593848" {}, "9db6ff" {}, "d03269" {}}
In this case I get only empty maps. I tried also to use do in the function
like
(defn retrieve-new-stats
[number-of-creators time timetype]
(do (prepare-evolution number-of-creators)
(start-evolution)
(track-evolution time timetype)))
But there I got only empty maps too.
So I wonder why I get filled maps, when I write these three function into
the REPL directly and only empty maps, when I execute them in a function.
What is the difference?
Has anybody an idea?
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