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使用Scala实现Spark wordcount统计
sc.textFile("./ml-1m/movies.dat").flatMap(line => line.split("::")).map(word => (word,1))
.reduceByKey((v1,v2) => v1 + v2).collect
// 两者实现的功能一样，只是写法不同
sc.textFile("./ml-1m/movies.dat").flatMap(line => line.split("::")).map(word => (word,1))
.reduceByKey(_+_).collect