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math/rand: fix typo and add better crash message

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R=golang-dev, r
CC=golang-dev
https://golang.org/cl/9000043
This commit is contained in:
Brad Fitzpatrick 2013-04-27 18:50:38 -07:00
parent d09f34cc55
commit e9546a01dc
1 changed files with 4 additions and 2 deletions
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6
src/pkg/math/rand/zipf.go
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@ -34,7 +34,6 @@ func (z *Zipf) hinv(x float64) float64 {
// NewZipf returns a Zipf generating variates p(k) on [0, imax]
// proportional to (v+k)**(-s) where s>1 and k>=0, and v>=1.
//
func NewZipf(r *Rand, s float64, v float64, imax uint64) *Zipf {
z := new(Zipf)
if s <= 1.0 || v < 1 {
@ -52,9 +51,12 @@ func NewZipf(r *Rand, s float64, v float64, imax uint64) *Zipf {
return z
}
// Uint64 returns a value drawn from the Zipf distributed described
// Uint64 returns a value drawn from the Zipf distribution described
// by the Zipf object.
func (z *Zipf) Uint64() uint64 {
if z == nil {
panic("rand: nil Zipf")
}
k := 0.0
for {