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Fixed algorithm.reversed to work for empty seq's.

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Reimer Behrends
2015-08-14 15:14:56 +02:00
parent 134c44f3be
commit 4e222a1506
1 changed files with 2 additions and 1 deletions
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3
lib/pure/algorithm.nim
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@@ -48,8 +48,9 @@ proc reverse*[T](a: var openArray[T]) =
## reverses the array `a`.
reverse(a, 0, a.high)
proc reversed*[T](a: openArray[T], first, last: Natural): seq[T] =
proc reversed*[T](a: openArray[T], first: Natural, last: int): seq[T] =
## returns the reverse of the array `a[first..last]`.
assert last >= first-1
var i = last - first
var x = first.int
result = newSeq[T](i + 1)