Hi All,
Firstly, sorry for the title that sounds like a click bait. I am not
understanding what exactly is wrong with this program
https://play.golang.org/p/Tl0wpaCqK7
package main
import (
"fmt"
"math/rand"
"runtime"
)
func xrand() int {
r := rand.New(rand.NewSource(99))
return r.Int()
}
func main() {
fmt.Printf("Version %s\n", runtime.Version())
fmt.Printf("looks buggy \t1: %d, 2: %d, 3: %d\n", xrand(), xrand(),
xrand())
r1 := rand.New(rand.NewSource(99))
fmt.Printf("Looks fine \t1: %d, 2: %d, 3: %d\n", r1.Int(), r1.Int(), r1
.Int())
}
*Output>>>>*
Version go1.8
looks buggy 1: 1108929909, 2: 1108929909, 3: 1108929909
Looks find 1: 1108929909, 2: 1298032409, 3: 913431059
When I generate a random number with "math/rand", like the example given in
documentation https://play.golang.org/p/O2k_za0AW7
<https://play.golang.org/p/Tl0wpaCqK7> except that I return the randomly
generated integer from a function, But the function keeps returning the
same value any number of time I call it. On the contrary running the same
code from the main generates random values, there isn't a reason to doubt
rand package. However in the second print statement where random numbers
are properly generated the first value always is the same value returned by
xrand(), here there is something to doubt rand package.
What am I missing here? Could it be a bug?
Thanks in advance.
Cheers
Shabinesh
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