小编mjl*_*wky的帖子

我是新手rand.Intn(n int) int,不知道为什么它rand.Intn(n int) int为每次运行打印相同的数字:

package main

import (
    "fmt"
    "math/rand"
)


func main() {
    fmt.Println(rand.Intn(10)) 
}

文档说:

Intn从默认Source返回[0,n]中的非负伪随机数作为int.如果n <= 0则会发生恐慌.

我如何正确播种随机数生成？

I have a Spark Scala program which uses a REST API to get data batch by batch, and once all the data is retrieved I operate on them.

Current Program:

• For each batch, create RDD and merge it with the previous RDD created using the previous API call rdd.union(currentRdd).

• Operate on final RDD

A simple program to reproduce the issue:

    def main(args: Array[String]) = {
     val conf = new SparkConf().setAppName("Union test").setMaster("local[1]")
     val sc = new SparkContext(conf)
     val limit = …