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package main
import (
"math/rand"
"time"
)
// randomString generates a pseudo-random alpha-numeric string with given length.
func randomString(length int) string {
rand.Seed(time.Now().UnixNano())
k := make([]rune, length)
for i := 0; i < length; i++ {
c := rand.Intn(35)
if c < 10 {
c += 48 // numbers (0-9) (0+48 == 48 == '0', 9+48 == 57 == '9')
} else {
c += 87 // lower case alphabets (a-z) (10+87 == 97 == 'a', 35+87 == 122 = 'z')
}
k[i] = rune(c)
}
return string(k)
}
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