diff options
| -rw-r--r-- | lib/pure/math.nim | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/pure/math.nim b/lib/pure/math.nim index 2f7a696b9..78154cdad 100644 --- a/lib/pure/math.nim +++ b/lib/pure/math.nim @@ -279,8 +279,13 @@ proc `mod`*(x, y: float): float = result = if y == 0.0: x else: x - y * (x/y).floor proc random*[T](x: TSlice[T]): T = + ## For a slice `a .. b` returns a value in the range `a .. b-1`. result = random(x.b - x.a) + x.a - + +proc random[T](a: openarray[T]): T = + ## returns a random element from the openarray `a`. + result = a[random(a.low..a.len)] + type TRunningStat* {.pure,final.} = object ## an accumulator for statistical data n*: int ## number of pushed data |