Recursion plays a larger role in pure functional programming than in imperative programming, in part because of the restriction that variables are immutable. Tail Calls and Tail-Call Optimization def factorial(i: BigInt): BigInt = { def fact(i: BigInt, accumulator: BigInt): BigInt = i matc...
A few build-in Data Types Scala 内置了很多基础数据类型供开发者使用,所有的这些数据类型都被封装成成熟的object,并非原始数据类型(int, float等) 如下为定义这些基础数据类型的示例: val b: Byte = 1 val i: Int = 1 val l: Long = 1 val s: Short = 1 上述Byte, Int, Long, Short四个数据类型...
Manipulating big data distributed over a cluster using functional concepts is rampant in industry, and is arguably one of the first widespread industrial uses of functional ideas. This is evidenced by the popularity of MapReduce and Hadoop, and most recently Apache Spark, a fast,... 阅读更多 ...
packagecom.atguigu.bigdata.scala object ScalaComment{ def main(args: Array[String]): Unit={/*多行注释*/} } 2.1.3 文档注释 packagecom.atguigu.bigdata.scala/*** doc注释*/object ScalaComment{ def main(args: Array[String]): Unit={ } } 2.2 变量 变量是一种使用方便的占位符,用于引用计算机...
The country's digital transformation policies, coupled with widespread IoT and big data adoption, support major investments in data center infrastructure. It is leading in digital infrastructure expansion, driven by government-supported sustainability initiatives and a growing dependence on renewable energy ...
二、BIG DATA PROCESSING In the context of big data, Scala has cemented its position as a viable language owing to Apache Spark, a fast, in-memory data processing engine with elegant development APIs to allow data workers to efficiently execute streaming, machine learning, or SQL workloads that...
// error package com.bigdata.spark { private class Zi { def parse( file: String ) : Unit = { } } package com.bigdata { class RunDriver { val tp: Zi = new Zi() } // ok package com.bigdata.spark { class Zi { // private[bigdata] 指定使用范围,在[bigdata]包里面的...
This repository contains codes for various data structures and algorithms in C, C++, Java, Python, C#, Go, JavaScript, PHP, Kotlin and Scala javascriptkotlinpythoncjavagophpscalacsharpalgorithmscppdata-structureshacktoberfest UpdatedJul 3, 2024 ...
Web-based notebook that enables data-driven, interactive data analytics and collaborative documents with SQL, Scala and more. javascriptjavascaladatabasebig-datasparknosqlflinkzeppelin UpdatedMay 9, 2025 Java 📚 Parameterize, execute, and analyze notebooks ...
Scala 有两种包的管理风格,一种方式和 Java 的包管理风格相同,每个源文件一个包(包名和源文件所在路径不要求必须一致),包名用“.”进行分隔以表示包的层级关系,如com.bigdata.scala。另一种风格,通过嵌套的风格表示层级关系,如下:package com{ package atguigu{ package scala{ } } } ...