jobs

Which sector of software industry uses C++? [closed]

我与影子孤独终老i 提交于 2019-11-26 23:57:12
问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 8 years ago . Locked . This question and its answers are locked because the question is off-topic but has historical significance. It is not

Avoid heroku server from sleeping

故事扮演 提交于 2019-11-26 23:03:28
问题 I got a website hosted on a Heroku server ( i'm a new to Heroku btw ), and as it's under the free package, it sleeps after 30m of inactivity , and to put it in action again when a user hits it, it takes around 7 secs to npm run start successfully. I'm thinking of run a nodejs job or something that open the website every 29m so that the server never sleeps, initially, I got something like this: (function wakeup() { require('open')('https://mywebsite.herokuapp.com', (err) => { if (err) throw

How do I get tcsetpgrp() to work in C?

南笙酒味 提交于 2019-11-26 20:57:12
问题 I'm trying to give a child process (via fork() ) foreground access to the terminal. After I fork() , I run the following code in the child process: setpgid(0, 0); And: setpgid(child, child); In the parent process. This gives the child its own process group. The call to setpgid() works correctly. Now I want to give the child access to the terminal. I added the following to the child after the setpgid() call: if (!tcsetpgrp(STDIN_FILENO, getpid())) { perror("tcsetpgrp failed"); } After that,

pg从csv文件导入数据到数据库中

倖福魔咒の 提交于 2019-11-26 19:24:57
前置条件 linux环境下安装的pg csv的tar.gz包已经上传到指定路径中(linux),建议表名个文件名一致 所有表和schema已建立 正式开始 1.在csv的tar包所在路径下,解压所有tar包 ls *.tar.gz | xargs -n1 tar xzvf 2.编辑导数脚本,执行脚本 nohup psql -d 数据库名称 -U 用户名称 -c "copy schema.表名 from '文件路径/文件名.csv' " >文件名.log 2>&1 & 如果没有多个数据库的话,可以不用指定数据库,直接使用gpadmin登录后,执行下面脚本 nohup psql -c "copy schema.表名 from '文件路径/文件名.csv' " >文件名.log 2>&1 & 3.查看执行结果,在控制台输入jobs可以查询导数结果: Done 表示导数完成; Running 表示正在进行导数; Exit 表示出错,可以通过查看日志来定位错误原因,解决错误之后,重新导数。 其他 psql使用技巧: 在控制台输入psql,可以进入pg命令行,可以输入sql脚本查询数据; 查询提示schema does not exists,可以在进入psql时指定用户名和数据库。 psql -d 数据库名称 -U 用户名称 来源: oschina 链接: https://my.oschina

pg从csv文件导入数据到数据库中

早过忘川 提交于 2019-11-26 19:02:37
前置条件 linux环境下安装的pg csv的tar.gz包已经上传到指定路径中(linux),建议表名个文件名一致 所有表和schema已建立 正式开始 1.在csv的tar包所在路径下,解压所有tar包 ls *.tar.gz | xargs -n1 tar xzvf 2.编辑导数脚本,执行脚本 nohup psql -d 数据库名称 -U 用户名称 -c "copy schema.表名 from '文件路径/文件名.csv' " >文件名.log 2>&1 & 如果没有多个数据库的话,可以不用指定数据库,直接使用gpadmin登录后,执行下面脚本 nohup psql -c "copy schema.表名 from '文件路径/文件名.csv' " >文件名.log 2>&1 & 3.查看执行结果,在控制台输入jobs可以查询导数结果: Done 表示导数完成; Running 表示正在进行导数; Exit 表示出错,可以通过查看日志来定位错误原因,解决错误之后,重新导数。 其他 psql使用技巧: 在控制台输入psql,可以进入pg命令行,可以输入sql脚本查询数据; 查询提示schema does not exists,可以在进入psql时指定用户名和数据库。 psql -d 数据库名称 -U 用户名称 来源: oschina 链接: https://my.oschina

SSIS: Make Excel Visible In Script Task During SQL Server Agent Job Run

依然范特西╮ 提交于 2019-11-26 18:33:58
问题 I built a package in SSIS that uses a script task to open an Excel file, format, and refresh some data in Excel. I would like to have Excel visible when the script task is running to see if Excel gets hung up which occurs all the time. Is this possible? I am converting a process that is calling Excel via a shell script to using SSIS to call Excel instead. I guess a second question is, is that a bad idea? 回答1: Why this is a bad idea Generally speaking, administrators are tasked with maximizing

Where is the job support in Play 2.0?

旧城冷巷雨未停 提交于 2019-11-26 16:35:04
问题 In Play 1.0, we can define some jobs which will be executed in the background: @OnApplicatonStart @Every("1h") public class DataJob extends Job { public void doJob() { // ... } } But I can't find it in Play 2.0. Do I miss something? 回答1: You could use the scheduler service in akka. http://doc.akka.io/docs/akka/2.0/java/scheduler.html http://doc.akka.io/docs/akka/2.0/scala/scheduler.html Basically you create an actor that executes your logic if it receives a certain message. 回答2: For the

前端开发岗位面试中常考的源代码实现

有些话、适合烂在心里 提交于 2019-11-26 12:14:29
手动撸个call/apply/bind 实现call 来看下 call 的原生表现形式: function test(arg1, arg2) { console.log(arg1, arg2) console.log(this.a, this.b) } run.call({ a: 'a', b: 'b' }, 1, 2) web前端开发学习Q-q-u-n: 784783012 ,分享开发工具,零基础,进阶视频教程,希望新手少走弯路 好了,开始手动实现我们的 call2 。在实现的过程有个关键: 如果一个函数作为一个对象的属性,那么通过对象的 . 运算符调用此函数, this 就是此对象 let obj = { a: 'a', b: 'b', test: function (arg1, arg2) { console.log(arg1, arg2) // this.a 就是 a; this.b 就是 b console.log(this.a, this.b) } } obj.test(1, 2) web前端开发学习Q-q-u-n: 767273102 ,分享开发工具,零基础,进阶视频教程,希望新手少走弯路 知道了实现关键,下面就是我们模拟的 call : Function.prototype.call2 = function(context) { if(typeof this !==

How much does it cost to develop an iPhone application? [closed]

拟墨画扇 提交于 2019-11-26 11:42:51
问题 How much can a developer charge for an iPhone app like Twitterrific? I want to know this because I need such an application with the same functionality for a new community website. I can do Ruby but have no experience with Objective-C. So it would be interesting for me if I should start reading books about iPhone programming or outsource the work to a iPhone programmer. 回答1: I'm one of the developers for Twitterrific and to be honest, I can't tell you how many hours have gone into the product

PowerShell: Job Event Action with Form not executed

女生的网名这么多〃 提交于 2019-11-26 11:39:04
问题 If I run the following code, the Event Action is executed: $Job = Start-Job {\'abc\'} Register-ObjectEvent -InputObject $Job -EventName StateChanged ` -Action { Start-Sleep -Seconds 1 Write-Host \'*Event-Action*\' } The string \' Event-Action \' is displayed. If I use a Form and start the above code by clicking a button, the Event Action is not executed: [System.Reflection.Assembly]::LoadWithPartialName(\"System.Windows.Forms\") $Form1 = New-Object Windows.Forms.Form $Form1.Add_Shown({ $Form1