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Programming-Idioms

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Idiom #135 Remove item from list, by its value

Remove at most 1 item from list items, having the value x.
This will alter the original list or return a new list, depending on which is more idiomatic.
If there are several occurrences of x in items, remove only one of them. If x is absent, keep items unchanged.

(let [[n m]
      (split-with (partial not= x) items)]
  (concat n (rest m)))

New implementation...