https://ecency.comhttps://ecency.com/logo512.pnghttps://ecency.comRSS for NodeThu, 30 Jul 2026 18:59:29 GMThttps://ecency.com/@padluo/6acx6mhttps://ecency.com/@padluo/6acx6mThu, 19 Jul 2018 04:33:09 GMT 0]）、花哨的索引操作（如arr[0, [1, 5]]），以及组合操作（如arr[:, [1, 5]]）。 在NumPy的二维数组里，data[0]返回第一行，而在DataFrame中，data['col0']返回第一列。 import numpy]]>https://ecency.com/@padluo/series-dataframehttps://ecency.com/@padluo/series-dataframeSun, 01 Jul 2018 07:02:39 GMThttps://ecency.com/@padluo/spark-sql-e-f-i-spark-sqlhttps://ecency.com/@padluo/spark-sql-e-f-i-spark-sqlThu, 24 May 2018 13:35:48 GMThttps://ecency.com/@padluo/spark-5-spark-corehttps://ecency.com/@padluo/spark-5-spark-coreThu, 10 May 2018 10:17:30 GMThttps://ecency.com/@padluo/scala-class-object-traithttps://ecency.com/@padluo/scala-class-object-traitSat, 05 May 2018 15:55:30 GMThttps://ecency.com/@padluo/spark-4-masterhttps://ecency.com/@padluo/spark-4-masterMon, 30 Apr 2018 15:42:36 GMThttps://ecency.com/@padluo/spark-3-sparkcontexthttps://ecency.com/@padluo/spark-3-sparkcontextSun, 29 Apr 2018 01:29:57 GMThttps://ecency.com/@padluo/spark-2-sparkhttps://ecency.com/@padluo/spark-2-sparkThu, 26 Apr 2018 10:01:36 GMT :paste // Entering paste mode (ctrl-D to finish) class HelloWorld { private var name = "leo" def sayHello() {print("Hello, " + name)} def getName]]>https://ecency.com/@padluo/scala-05https://ecency.com/@padluo/scala-05Tue, 27 Mar 2018 03:35:48 GMT val ages = Map("Leo" -> 30, "Jen" -> 25, "Jack" -> 23) scala> val ages = Map("Leo" -> 30, "Jen" -> 25,]]>https://ecency.com/@padluo/scala-04map-tuplehttps://ecency.com/@padluo/scala-04map-tupleMon, 26 Mar 2018 09:58:27 GMT val a = new Array[Int](10) a: Array[Int] = Array(0, 0, 0, 0, 0, 0, 0,]]>https://ecency.com/@padluo/scala-03https://ecency.com/@padluo/scala-03Sun, 25 Mar 2018 15:19:54 GMT :paste // Entering paste mode (ctrl-D to finish) def sayHello(name:String, age:Int) = { if(age >= 18) { printf("Hi, %s, you are a big]]>https://ecency.com/@padluo/scala-02https://ecency.com/@padluo/scala-02Sat, 24 Mar 2018 07:58:33 GMT val age = 30 age: Int = 30 scala> val isAdult = if(age > 18) 1 else 0 isAdult: Int = 1 if表达式的类型推断，if和else子句的值类型可能不同，Scala会自动进行推断，取两个类型的公共父类型。]]>https://ecency.com/@padluo/scala-01https://ecency.com/@padluo/scala-01Fri, 23 Mar 2018 15:38:15 GMThttps://ecency.com/@padluo/kafkahttps://ecency.com/@padluo/kafkaFri, 02 Mar 2018 08:54:54 GMThttps://ecency.com/@padluo/flumehttps://ecency.com/@padluo/flumeWed, 28 Feb 2018 03:43:06 GMThttps://ecency.com/@padluo/iphone5-a1429-3g-4ghttps://ecency.com/@padluo/iphone5-a1429-3g-4gSun, 25 Feb 2018 05:38:12 GMThttps://ecency.com/@padluo/flume-kafka-stormhttps://ecency.com/@padluo/flume-kafka-stormFri, 09 Feb 2018 10:51:24 GMT