简介 WSL,是Windows Subsystem for Linux的缩写,字面意义上理解就是WIndows下的Linux子系统.WSL 由Microsoft Windows内核团队创建,目前如果最为学习Linux使用的化已经支持的相当好了.WSL现已被集成到WIndows 10中,如果想要使用该功能需要单独打开并重启. WSL使用了一个subsystem的概念,传统上我们认为Linux程序无法在Windows上运行,因为两者可执行文件标准是不同的(ELF和Win32).但事实上这是个误区,W…

A quick tour of JSON libraries in Scala Update (18.11.2015): added spray-json-shapeless libraryUpdate (06.11.15): added circe library Some time ago I wrote a post on relational database access in Scala since I was looking for a library and there were…

https://www.codemag.com/article/0810042 While general accessibility requirements (such as font colors in UI rendering) are important, programmatic access to the graphical user interface (GUI) is a crucial element to improving accessibility. On the Wi…

入门指南 1. 简介 Quickstart 会让你启动和运行一个单节点单机HBase. 2. 快速启动 – 单点HBase 这部分描述单节点单机HBase的配置.一个单例拥有所有的HBase守护线程-Master,RegionServers和ZooKeeper,运行一个单独JVM持久化到本地文件系统.这是我们最基础的部署文档.我们将会向你展示如何通过hbase shell CLI在HBase中创建一个表格,在表中插入行,执行put和scan操作,让表使能和启动和停止HBase等等操作. 除了下载…

MSDN Blogs > Zemblanity > Windows And Video Memory   Windows And Video Memory Tom_Mulcahy 11 Feb 2009 12:13 PM  The following explanations are overviews. In the interests of brevity, they neglect some corner cases. Definitions: Video memory: For our…

SharePoint 2010母版页所用的还是ASP.NET 2.0中的技术.通过该功能,实现了页面框架布局与实际内容的分离.虽然在本质上自定义母版页的过程和以前版本的SharePoint大致相同,但是从2007到2010仍然有许多重要的值得我们关注的变化.本文将试图: 巩固和掌握SharePoint 2010里母版页相关的一些基本操作 突出描述新版本和以前的版本之间的一些变化 了解一些有用的或比较常见的自定义方式 SharePoint 2010 母版页的类型 首先,让我们快速的看一下在Shar…

  投递人 itwriter 发布于 2011-09-26 17:46 评论(3) 有1956人阅读 原文链接 [收藏] « » 本文介绍 20 个值得一试的 JavaScript 框架,如果你认为答案是 jQuery,那你只能得F级的评级. 闲话少说,看看便知,列表如下: Sproutcore Sproutcore 提供大量的高性能应用包括 MobileMe 等.Sproutcore 拥有个 UI 框架,标准 MVC 架构及完整友好的文档. 相关链接: Using SproutCore 2.0…

http://handong1587.github.io/deep_learning/2015/10/09/training-dnn.html  //转载于 Training Deep Neural Networks  Published: 09 Oct 2015  Category: deep_learning Tutorials Popular Training Approaches of DNNs — A Quick Overview https://medium.com/@asjad/p…

关于(About) 官方文档介绍了所有的Apache Solr实现的重要特性和功能.它是免费的,可以到http://lucene.apache.org/solr/下载. 为了更加的深入和广泛,设计成一个较高水平的文档,而不是一个菜谱.文档定位到比较广泛的需求,帮助新手和经验丰富的开发人员扩展他们的应用,帮助他们定位和解决问题.在应用开发生命周期中,关于任何一点关于Solr的内容都可以使用这个文档,会得到最权威的信息. 这里默认你熟悉搜索的概念并且能够读懂XML,你不需要是个Java程序员,但是有…

转自:http://blog.leapoahead.com/2015/09/15/js-closure/ 我研究JavaScript闭包(closure)已经有一段时间了.我之前只是学会了如何使用它们,而没有透彻地了解它们具体是如何运作的.那么,究竟什么是闭包? Wikipedia 给出的解释并没有太大的帮助.闭包是什么时候被创建的,什么时候被销毁的?具体的实现又是怎么样的? "use strict"; var myClosure = (function outerFunction()…

本文转自:https://www.mssqltips.com/sqlservertip/1917/performance-analysis-using-sql-server-2008-activity-monitor-tool/ Problem While looking through the new features and improvements in SQL Server 2008 Management Studio (SSMS) we found a potentially inte…

overview Oracle's cost-based optimizer (COB) uses statistics to calculate the selectivity (the fraction of rows in a table that the SQL statement's predicate chooses) of predicates and to estimate the "cost" of each execution plan. The COB will…

http://www.jayway.com/2014/04/08/windows-phone-8-1-for-developerswhat-controls-are-new-2/ What controls are removed between version 8.0 to 8.1 First we start to look at what has been removed from Windows Phone 8.0 and how to replace them in Windows P…

转载:https://blog.ionelmc.ro/2015/02/09/understanding-python-metaclasses/ None of the existing articles [1] give a comprehensive explanation of how metaclasses work in Python so I'm making my own. Metaclasses are a controversial topic [2] in Python, ma…

Code coverage is a measure used in software testing that describes the degree to which the source code of a program has been tested. It a form of white box testing as it is a form of testing that inspects the code directly. Recommended Reading: 12 So…

add by zhj:先收藏了,有时间看,图倒是不少,可以配合stackover flow上那篇文章一起看 原文:http://blog.ionelmc.ro/2015/02/09/understanding-python-metaclasses/ None of the existing articles [1] give a comprehensive explanation of how metaclasses work in Python so I'm making my own. Me…

Cloud computing can broadly be broken down into three main categories based on the deployment model. Here is a definition of each one, courtesy of Wikipedia: Public Cloud Public cloud applications, storage, and other resources are made available to t…

android的多线程在开发中已经有使用过了,想再系统地学习一下,找到了android的官方文档,介绍进程与线程的介绍,试着翻译一下. 原文地址:http://developer.android.com/guide/components/processes-and-threads.html 首先翻译一下GOOGLE的官方文档, Processes and ThreadsWhen an application component starts and the application does no…

I know it well:I read it in the grammar long ago.—William Shakespeare, The Tragedy(悲剧:灾难:惨案) of Titus Andronicus This chapter introduces the grammar of the good parts of JavaScript, presenting a quick overview of how the language is structured. We wi…

Posted on 19/09/2014 by Stewart Smith So, I’ve been looking around for a while (and a few times now) for any good resources that cover a bunch of MySQL architecture and technical details aimed towards the technically proficient but not MySQL literate…

JSPM can handle installed packages, transpiling ES6, and bundling all from the command-line. This video gives a quick overview of install JSPM, installing packages with JSPM, writing a very simple app in ES6 that uses those packages, then bundling up…

In version MySQL 5.7.7 Oracle presented a new promising feature: optimizer hints. However it did not publish any documentation about the hints. The only note which I found in the user manual about the hints is: It is now possible to provide hints to…

Seven habits of effective text editing(via) Bram Moolenaar November 2000 If you spend a lot of time typing plain text, writing programs or HTML, you can save much of that time by using a good editor and using it effectively. This paper will present g…

Beej's Guide to Network Programming Using Internet Sockets Brian "Beej Jorgensen" Hallbeej@beej.us Version 3.0.15July 3, 2012 Copyright © 2012 Brian "Beej Jorgensen" Hall Contents 1. Intro 1.1. Audience 1.2. Platform and Compiler 1.3. …

spark集群中的节点可以只处理自身独立数据库里的数据,然后汇总吗? 修改 我将spark搭建在两台机器上,其中一台既是master又是slave,另一台是slave,两台机器上均装有独立的mongodb数据库.我是否可以让它们只统计自身数据库的内容,然后将结果汇总到一台服务器上的数据库里?目前我的代码如下,但是最终只统计了master里的数据,另一个worker没有统计上. val config = new Configuration() //以下代码表示只统计本机数据库上的数据,猜测问题可能…

WinForms Controls >Controls > Chart Control > Getting Started This document gives you a quick overview of what resources you need to review first to get started with the XtraCharts Suite. These examples demonstrate the basic functionality of Xtra…

安装完scrapy后,创建一个新的工程: scrapy startproject tutorial 会创建一个tutorial文件夹有以下的文件: tutorial/ scrapy.cfg tutorial/ __init__.py items.py pipelines.py settings.py spiders/ __init__.py ... These are basically: scrapy.cfg: the project configuration file tutorial/:…

Python Object Graphs - objgraph 1.7.2 documentation Python Object Graphs¶ objgraph is a module that lets you visually explore Python object graphs. You'll need graphviz if you want to draw the pretty graphs. I recommend xdot for interactive use. pip…

src: https://wiki.edubuntu.org/ARM/Thumb2PortingHowto#ARM_Assembler_Overview When you see some assembler in a source package, there are some things which you need to consider when porting for Thumb-2 compatibility. This page aims to highlight the mai…

摘要: 1 Django是一个开放源代码的Web应用框架,由Python写成.采用了MVC的软件设计模式,即模型M,视图V和控制器C.模型即后端逻辑,视图就是url对应的前端展示 2本文简介了使用模型和视图搭建一个网站的例子. Django at a glance Because Django was developed in a fast-paced newsroom environment, it was designed to make common Web-development tas…