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as?->

core-api



    macro
    boot.janet on line 1490, column 1

    (as?-> x as & forms)

    Thread forms together, replacing `as` in `forms` with the value of 
    the previous form. The first form is the value x. If any 
    intermediate values are falsey, return nil; otherwise, returns the 
    last value.

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(as?-> [1 2 3] _ 
  (sum _)
  (when ( $>$  6 _) _))
# => nil

(as?-> [1 2 3] _ 
  (sum _)
  (when ( $>=$  6 _) _))

# => 6

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