Of all the developers’ delight, a set of APIs that makes them productive, that are easy to use, and that are intuitive and expressive is the most attractive delight. One of Apache Spark’s appeal to developers has been its easy-to-use APIs, for operat…

文章标题 A Tale of Three Apache Spark APIs: RDDs, DataFrames, and Datasets 且谈Apache Spark的API三剑客:RDD.DataFrame和Dataset When to use them and why 什么时候用他们,为什么? tale [tel] 传说,传言;(尤指充满惊险的)故事;坏话,谣言;〈古〉计算,总计 作者介绍 Jules S. Damji是Databricks在Apache Spark社区的布道者.他也是…

11 Clever Methods of Overfitting and how to avoid them Overfitting is the bane of Data Science in the age of Big Data. John Langford reviews "clever" methods of overfitting, including traditional, parameter tweak, brittle measures, bad statistic…

事情的起因还是因为一段代码,因为在做一个2D TileBase的游戏 所以需要有一个简单的 Tile坐标到世界坐标的变换 public static Vector3 GetTileWorldPosByTileIndex(int _tileIndexX, int _tileIndexY , Vector3 _result) { if(_result == null) { _result = new Vector3(); } _result.x = TileConst.TILE_WIDTH * _t…

B. Berland National LibraryTime Limit: 2 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/567/problem/B Description Berland National Library has recently been built in the capital of Berland. In addition, in the library you can take any of…

本文转自:http://msdn.microsoft.com/en-us/library/bb445504.aspx Scott Mitchell April 2007 Summary: This is the Visual C# tutorial. (Switch to the Visual Basic tutorial.) The default-paging option of a data presentation control is unsuitable when working w…

Recently my colleague Rasmus Johansson announced that MariaDB is adding support for the Facebook MyRocks storage engine. Today I'm going to share a bit more on what that means for MariaDB users. Members of the Facebook Database Engineering team helpe…

APPLIES TO: Oracle Database - Enterprise Edition - Version 8.1.7.4 to 11.2.0.1 [Release 8.1.7 to 11.2]Information in this document applies to any platform.***Checked for relevance on 03-Nov-2014*** PURPOSE This article describes what happens when a s…

B. Berland National LibraryTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/567/problem/B Description Berland National Library has recently been built in the capital of Berland. In addition, in the library you can take any o…

http://technet.microsoft.com/en-us/library/bb742455.aspx Abstract Network Load Balancing, a clustering technology included in the Microsoft Windows 2000 Advanced Server and Datacenter Server operating systems, enhances the scalability and availabilit…