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fix: t-once doesn't add to an empty stream or add nil to any stream #2

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fix: t-once doesn't add to an empty stream or add nil to any stream #2

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20 changes: 11 additions & 9 deletions transducers.el
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Original file line number Diff line number Diff line change
Expand Up @@ -1026,16 +1026,18 @@ This requires a sequence of HEADERS to match keys by."
#\'t-cons (t-ints 1))
=> (hi 11 12)"
(lambda (reducer)
(let ((item item))
(let ((item (list item)))
(lambda (result &rest inputs)
(if inputs (if item
(let ((res (funcall reducer result item)))
(if (t-reduced-p res)
res
(progn (setq item nil)
(apply reducer res inputs))))
(apply reducer result inputs))
(funcall reducer result))))))
(if item (let ((res (funcall reducer result (car item))))
(if (t-reduced-p res)
res
(setq item nil)
(if inputs
(apply reducer res inputs)
(funcall reducer res))))
(if inputs
(apply reducer result inputs)
(funcall reducer result)))))))

;; (t-transduce (t-comp (t-filter (lambda (n) (> n 10)))
;; (t-once 'hi)
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