clojure.zip/prev

function

since v0.0-927

clojure.zip/prev

Edit

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Source docstring:

Moves to the previous loc in the hierarchy, depth-first. If already
at the root, returns nil.

(defn prev
  [loc]
    (if-let [lloc (left loc)]
      (loop [loc lloc]
        (if-let [child (and (branch? loc) (down loc))]
          (recur (rightmost child))
          loc))
      (up loc)))

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