oops there is a typo!
line 6 should be:
(conj res (doto c (.setAppliedBalance (max 0 (- due (.getBalance c))))))
On 03/05/13 15:22, Jim - FooBar(); wrote:
something like this perhaps?
(loop [[c & more]] cards
res []
due 100]
(if-not c res
(recur more
(conj res (doto c (.setAppliedBalance (max 0 (- due )))))
(->> c .getBalance (- due)))) )
Jim
ps: haven't got a clue what objects you're working with so I'm
purposefully using setters which is close to what you showed in your
Ruby example....
On 03/05/13 14:28, Jim - FooBar(); wrote:
On 02/05/13 22:21, Steven Degutis wrote:
Given pseudo-code (Ruby-ish):
due = 100
cards = cards.map do |card|
card.applied_balance = max(0, due - card.balance)
due -= card.applied_balance
Notice how due changes at each turn, and each successive item in
"cards" sees the change.
What's an idiomatic way to do this in Clojure without using refs?
-Steven
Not a Ruby expert here, but I think 'reduce' is your friend.... :)
loop/recur is also an option ...
the problem is not really how to loop, but how to replace all this
mutation...I'm saying this because you specifically asked not to use
any reference types.
Jim
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