undefined (type *math/rand.Rand has no field or method randIntn)

[Anjana Prabhakar]

Hi All,

I am trying to generate a random integer using the below code snippet:

package ABC
import (
*****
"math/rand"
)
func execBlock(

logger log.Logger,) {

var validTxs, invalidTxs, unchkdTxs = 0, 0, 0

txIndex := 0

proxyCb := func(req *xxx, res *yyy) {

if r, ok := res.Value.(*yyyy); ok {

txRes := r.DeliverTx

// code for random integer begin

  s1 := rand.NewSource(time.Now().UnixNano())

    r1 := rand.New(s1)

toCheck := r1.randIntn(100) // getting error for this line

if toCheck <= 65{

***********

}else {

*********

}// end

}

}

}

I get the error as r1.randIntn undefined (type *math/rand.Rand has no field or method randIntn). Please help.

Thanks,

Anjana

[burak serdar]

It doesn't have randIntn, it has Intn, so use r1.Intn(100)

>
> Thanks,
> Anjana
>
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[Jake Montgomery]

On Tuesday, February 25, 2020 at 1:42:31 PM UTC-5, Anjana Prabhakar wrote:

I get the error as r1.randIntn undefined (type *math/rand.Rand has no field or method randIntn). Please help.

The message is  pretty clear. The first step I would take with a message like that is to look at the documentation for the type that the compiler has so kindly provided. If you go to the documentation for the rand package, you will see that the Rand struct has no method 'randIntn', just as the message says. The next step would be to read about the methods that are available for rand.Rand, and see if any of them fit your needs.

(The fact that randIntn starts with a lower case letter is a big hint that there could be no such public method.)

Good Luck

[Anjana Prabhakar]

Thank you.

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[Anjana Prabhakar]

Thank you.