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Idiomatic mode to loop the network to Clojure

 3 years ago
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Idiomatic mode to loop the network to Clojure

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I am new to clojure and some how I find simple array manipulations which are easy in python too hard to do in clojure. For example, what is an idiomatic way to do this in clojure?

for i = 1 to len(arr)-1:
  sum[i] = arr[i-1] + i


Clojure has a nice set of sequence manipulation functions that are often helpful for these common tasks. this example would be (map-indexed + arr)

user> (def arr [1 2 38 2 3 9 4 2])
#'user/arr
user> (map-indexed + arr)
(1 3 40 5 7 14 10 9)

though that's just because of the specific example you chose. A more general answer would be to use map, mapv, reduce, or reductions or for for this sort of thing. For instance:

user> (for [i (range 0 (count arr))] (+ i (arr i)))
(1 3 40 5 7 14 10 9)

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