Jack葛

摘要： 隐式转换函数implicit def function例如implicit def rddToPairRDDFunctions[K, V](rdd: RDD[(K, V)])scala> class Person(val name: String)defined class Personscala>... 阅读全文

摘要： match case的模式匹配scala> def bigData(data: String){ | data match { | case "Spark" => println("Spark") | case "Hadoop" => println("Hadoop") ... 阅读全文

摘要： 定义函数scala> def fun1(name: String) {println(name)}fun1: (name: String)Unitscala> var fun1_v=fun1 _//加空格加下划线fun1_v: String => Unit = 调用结果scala> fun1("Sp... 阅读全文

摘要： 定义类class HiScala {private var name = "Spark"def sayName(){println(name)}def getName=name}实例化类scala> val scal = new HiScalascal: HiScala = HiScala@769d... 阅读全文

摘要： 定义变量scala> val age : Int = 0age: Int = 0scala> var age1, age2, age3 = 0age1: Int = 0age2: Int = 0age3: Int = 0基本类型的方法scala> 10.totoByte toChar ... 阅读全文

摘要： 大数据开发 阅读全文