Works for me: https://play.golang.org/p/zD5F7gp41re
Like Burak I suspect you are initializing the RNG in a tight loop. Since
`time.Now().Unix()` has a resolution of one second you end up generating
the same initial value every time through the loop until the current time
advances to the next second.
On Wed, Jun 26, 2019 at 7:48 PM Chou Yan <yan.chou.str...@gmail.com> wrote:
> like this:
> r:=rand.New(rand.NewSource(time.Now().Unix()))
> for {
> r.Intn(96)
> }
> I know the same seed will generate the same sequence. But I don't know why
> it generate mass same number when I use seed of 'time.Now().Unix()', But
> when I use seed of 'time.Now().UnixNano()', It will not.
> I suspect what this is related to the seqence rand algorithm,But I have no
> relevant evidence
>
> 在 2019年6月27日星期四 UTC+8上午10:32:38，Burak Serdar写道：
>>
>> On Wed, Jun 26, 2019 at 8:17 PM Chou Yan <yan.ch...@gmail.com> wrote:
>> >
>> > I use:
>> > r:=rand.New(rand.NewSource(time.Now().Unix()))
>> > r..Intn(96)
>>
>> How are you generating multiple random numbers? If your loop that
>> generates these numbers include the r:=rand.New(...), then you're
>> essentially seeding the random number generator with the same number,
>> because the program ends before time.Now().Unix() returns a different
>> value every second.
>>
>> Move the r:=rand.New(...) outsite the for loop.
>>
>> > I got:
>> >
>> > and val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 39
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > rand val: 82
>> > ...
>> > mass common sequential number .
>> > But if I change that：
>> > r:=rand.New(rand.NewSource(time.Now().UnixNano()))
>> > It will not happen.
>> > Why does this happened? and how do I choose it between
>> time.Now().Unix() or UnixNano()?
>> >
>> > --
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