小编cyb*_*ron的帖子

我正在尝试创建一个PHP聊天,所以我server.php在终端启动服务器,这是听取client连接:

<?php

function chat_leave( $sock, $chat_id = 0 )
{
    if( $chat_room_id[ $chat_id ] )
    {
        unset( $chat_room_id[ $chat_id ] ); 
        return true;
    }
    socket_close($sock);
    return false;
}

function client( $input )
{
    /*
    Simple php udp socket client
    */

    //Reduce errors
    error_reporting(~E_WARNING);

    $server = '127.0.0.1';
    $port = 9999;

    if(!($sock = socket_create(AF_INET, SOCK_DGRAM, 0)))
    {
        $errorcode = socket_last_error();
        $errormsg = socket_strerror($errorcode);

        die("Couldn't create socket: [$errorcode] $errormsg \n");
    }

    //Communication loop
    while(1)
    {

        //Send the …

我是Java map和filters8中的新用户.我目前正在使用Spark ML库来进行一些ML算法.我有以下代码:

// return a list of `Points`.
List<Points> points = getPoints();
List<LabeledPoint> labeledPoints = points.stream()
                                        .map(point -> getLabeledPoint(point))
                                        .collect(Collectors.toList());

如果数据正确,则函数getLabeledPoint(Point point)返回new,LabeledPoint否则返回null.我怎样才能过滤(删除)null LabeledPoint对象map？

我试图用Salt-Api,所以我创建了一个salt-api.conf在/etc/salt/master.d/如下:

external_auth:
  pam:
    saltuser:
      - .*
      - '@wheel'   # to allow access to all wheel modules
      - '@runner'  # to allow access to all runner modules
      - '@jobs'    # to allow access to the jobs runner and/or wheel module

rest_cherrypy:
  port: 8000
  ssl_crt: /etc/pki/tls/certs/localhost.crt
  ssl_key: /etc/pki/tls/certs/localhost.key
  disable_ssl: True
  webhook_disable_auth: True
  webhook_url: /hook

用户输入/etc/salt/master设置为user: root.因此,当我尝试使用pam本地身份验证时,它可以工作:

sudo salt -a pam '*' test.ping
username: saltuser
password: saltuser

minion:
    True

但是,当我尝试使用curl时,它会失败:

curl …

我的构造函数中有以下代码块(这只是一个示例,问题不在于split,而是抛出一个通用异常.此外,不能使用Boost库.

Transfer::Transfer(const string &dest){
  try{
    struct stat st;
    char * token;
    std::string path(PATH_SEPARATOR) // if it is \ or / this macro will solve it
    token = strtok((char*)dest.c_str(), PATH_SEPARATOR) // 
    while(token != NULL){
        path += token;
        if(stat(path.c_str(), &st) != 0){
            if(mkdir(path.c_str()) != 0){
                 std:string msg("Error creating the directory\n");
                 throw exception // here is where this question lies
            }
        }

        token = strtok(NULL, PATH_SEPARATOR);
        path += PATH_SEPARATOR;

    }
  }catch(std::exception &e){
       //catch an exception which kills …

我正在尝试在python中评估以下函数:

f(x) = (1 + cos(x))^(1/3)


def eval( i ):
   return math.pow( (1 + math.cos( i )), 1/3)

它为什么总是归还我1？我试图计算Right和Left积分的近似,并且后者的申请Simpson's Rule,但Python似乎不喜欢这样的表达.救命？ *完整代码*

import math

min = 0
max = math.pi / 2
n = 4
delta  = ( min + max ) / n

def eval( i ):
   return math.pow( (1 + math.cos( i )), 1/3)

def right( ):
   R = 0
   for i in range(1, n+1):
        R += eval( i …

我正在为我正在开发的项目使用Fullcalendar ...我只剩下一个要实现的功能,即将现有事件从其原始位置拖动到另一个时间或日期.我想知道如何获取当前对象信息(标题,新开始时间,旧开始时间,id,url等),因此我可以使用更新的信息更新数据库... Fullcalendar对象中的哪个属性我用？我实施了这个drop属性;

    drop  : function(date, allDay) {
            // retrieve the dropped element's stored event object
            var originalEventObject = $(this).data('eventObject');
            // we need to copy it, so that multiple events don't 
            // have a reference object
            var copiedEventObject   = $.extend({}, originalEventObject);
            // assign it the date that was reported
            copiedEventObject.start = date;
            copiedEventObject.allDay = allDay;

            // render the event on the calendar
            // the last `true` argument determines if the event `sticks`
            $('#calendar').fullCalendar('renderEvent', copiedEventObject, true);

            // if …

我在一个新手Ansible，所以我写了一个小程序ansible安装一些软件包的依赖关系为系统我写：

---

- hosts: all
  user: root
  tasks:
      - name: install requirements
        apt: name={{item}} state=latest update_cache=true
        with_items:
            - gcc
            - python-dev
            - python-setuptools
            - python-software-properties

当前支持的环境是Ubuntu、Red Hat和Mac OS X。该剧本的当前编写方式仅适用于Ubuntu (Debian). 我怎样才能根据操作系统执行那部分代码？为Ubuntu它apt，为Red Hat它yum，为Mac OS X brew。

我正在解析以下AWS成本实例表:

m1.small    1   1   1.7     1 x 160    $0.044 per Hour
m1.medium   1   2   3.75    1 x 410    $0.087 per Hour
m1.large    2   4   7.5     2 x 420    $0.175 per Hour
m1.xlarge   4   8   15      4 x 420    $0.35 per Hour

有一个包含这些费用的文件:

input = new Scanner(file);
String[] values;
while (input.hasNextLine()) {
    String line = input.nextLine();
    values = line.split("\\s+"); // <-- not what I want...
    for (String v : values)
        System.out.println(v);
}

然而,这给了我:

m1.small
1
1
1.7
1
x …

我正在使用Docker-py API来处理和操作Docker容器.在该函数中API,put_archive()函数期望该data字段以字节为单位.所以,使用tarfile我有的库:

import tarfile
import io

container = client.create_container(image="myimage", command="/bin/bash")
source = "~/.ssh/id_rsa.pub"
tarfile = create_tar_file(path=source, name="keys.tar")
# tarfile = "keys.tar"
# How can I read the tar file was a BytesIO() object?
data = io.BytesIO()
client.put_archive(container=container, path="/tmp", data=data)

API说:

put_archive(container,path,data)

    使用tar存档作为源在现有容器中插入文件或文件夹.

    参数:

        container(str) - 将提取文件的容器.
        path(str) - 将提取文件的容器内的路径.必须存在.
        data( …

我Apache Spark在AWS中创建了一个3节点(1个主节点,2个工作节点)集群.我可以从主服务器向集群提交作业,但是我无法远程工作.

/* SimpleApp.scala */
import org.apache.spark.SparkContext
import org.apache.spark.SparkContext._
import org.apache.spark.SparkConf

object SimpleApp {
  def main(args: Array[String]) {
    val logFile = "/usr/local/spark/README.md" // Should be some file on your system
    val conf = new SparkConf().setAppName("Simple Application").setMaster("spark://ec2-54-245-111-320.compute-1.amazonaws.com:7077")
    val sc = new SparkContext(conf)
    val logData = sc.textFile(logFile, 2).cache()
    val numAs = logData.filter(line => line.contains("a")).count()
    val numBs = logData.filter(line => line.contains("b")).count()
    println(s"Lines with a: $numAs, Lines with b: $numBs")
    sc.stop()
  }
}

我可以从大师那里看到:

Spark Master at spark://ip-171-13-22-125.ec2.internal:7077
URL: spark://ip-171-13-22-125.ec2.internal:7077
REST URL: …