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Wang Jialin personally taught "DT big data Dream Factory" big data actual combat video Scala profound and simple actual combat classic (lecture 1-87) complete video, PPT, code download:

Baidu cloud disk: http://pan.baidu.com/s/1c0noOt6

Tencent Weiyun: http://url.cn/TnGbdC

360Cloud disk: http://yunpan.cn/cQ4c2UALDjSKy access password 45e2

Potato: http://www.tudou.com/programs/view/dHz5JKJxurM/

Youku: http://v.youku.com/v_show/id_XMTI4OTcwNzY2MA==.html?from=s1.8-1-1.2

Iqiyi: http://www.iqiyi.com/w_19rru5bi79.html#vfrm=2-3-0-1

Tencent Video: http://v.qq.com/boke/page/k/0/d/k016008s0rd.html

Technology enthusiasts, especially big data enthusiasts, can add the qq group of DT big data DreamWorks.

DT big data DreamWorks ①: 462923555

DT big data DreamWorks ②: 437123764

DT big data DreamWorks ③: 418110145

Wechat public account: DT_Spark

Mr. Wang Jialin's WeChat account: 18610086859

Mr. Wang Jialin QQ: 1740415547

Mr. Wang Jialin email: 18610086859@126.com

This video is explained by Mr. Wang Jialin in person, completely through the code to bring you to the era of people's data.

Package com.dt.scala.pattern_match/** * @ author iken * @ date 2015-08-29 * / object PatternMatchMore {def main (args: Array [String]) {/ * * 1. Match a variable of an unknown type to the corresponding type * this is so advanced that pattern matching can intelligently determine the type of content to be matched while the program is running * Note: Map does not specify its type because scala does pattern matching for interfaces and generics Scala erases the specific type * so uses the placeholder * / def match_type (t: Any) = t match {case p: Int = > println ("It is an integer!") Case p: String = > println ("It is an Integer!") Case m: Map [_, _] = > m.foreach (println) case _ = > println ("unknow type!")} match_type (2) match_type (Map ("Scala"-> "Spark")) / * * 2. Match an unknown array, which can match the array to a specific form of case * case1 means that the array has only one element, and the element must be 0 * case2, which means that the array has two arbitrary elements * case3 means that the data has any number of elements. And the first element must be 0 * / def match_array (arr: Any) = arr match {case Array (0) = > println ("Array" + "0") case Array (xonomy) = > println ("Array" + x + "" + y) case Array (0jurisdiction *) = > println ("Array" + "0...") Case _ = > println ("some thing!")} match_array (Array (0)) match_array (Array (0meme 1)) match_array (Array (0pime 1) 2 Jing 3)) match_array (Array ("hello", "world")) / * * 3. Match an unknown List, which can match the array to a specific form of case * case1 means that the List has only one element, and the element must be 0 * case2, which means that the List has two arbitrary elements * case3 means that the List has any number of elements. And the first element must be 0 * / def match_list (lst: Any) = lst match {case 0:: Nil = > println ("List" + "0") case x:: y:: Nil = > println ("List" + x + "" + y) case 0:: tail = > println ("List" + "0...") Case _ = > println ("some thing!")} match_list (List (0)) match_list (List (0meme 1)) match_list (List (0pime 1) 2 Jing 3 Jing 4) match_list (List ("hello", "world")) / * * 4. Match an unknown Tuple, which can match the array to a specific form of case * case1 means that the Tuple has only one element, and the element must be 0 * case2, which means that the Tuple has two arbitrary elements * case3 means that the Tuple has any number of elements. And the first element must be 0 * / def match_tuple (tuple: Any) = tuple match {case (0println _) = > println ("List" + "0") case (XMague _) = > println ("List" + x) case _ = > println ("some thing!")} match_tuple ((0, "scala")) match_tuple (("hello", 1) match_tuple ((0prit 1) 2pm 3)}}

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