本篇内容主要讲解“spark的匿名函数怎么使用”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“spark的匿名函数怎么使用”吧!
变量与常量
scala> var a = addOne(4)
a: Int = 5
scala> var a = 123
a: Int = 123
scala> a = 124
a: Int = 124
scala> val b = "demo"
b: String = demo
scala> b = "demo2"
<console>:27: error: reassignment to val
b = "demo2"
^
函数
scala> def addOne(m:Int):Int = {
| m+1
| }
addOne: (m: Int)Int
scala> var a = addOne(4)
a: Int = 5匿名函数
scala> (x:Int)=>x+1
res0: Int => Int = <function1>
scala> var addOne = (x:Int)=>x+1
addOne: Int => Int = <function1>
scala> addOne(3)
res1: Int = 4
多行匿名函数，传入多个参数
scala> def mult = {(x:Int,y:Int)=>
| var z = x * y
| z+19
| }
mult: (Int, Int) => Int
scala> mult(4,5)
res6: Int = 39对象
scala> class Person{
| var age : Int = 30
| def grow() : Int = {
| age =age +1
| age
| }
| }
defined class Person
scala> var person = new Person
person: Person = $iwC$$iwC$Person@2183cb14
scala> person.grow()
res2: Int = 31
scala> person.grow()
res3: Int = 32到此，相信大家对“spark的匿名函数怎么使用”有了更深的了解，不妨来实际操作一番吧！这里是天达云网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！