Detailed introduction to the foreach operator in Spark

1. Detailed introduction to the foreach operator in Spark

In Spark, the foreach function is used to perform iterative operations on a distributed dataset, but unlike collect, it does not collect the contents of the entire dataset to the driver node. Instead, the specified operations are performed on each distributed computing node.

1. Function introduction

In Spark, foreachit is an action operator (Action Operator) used to operate on RDD. It is used to apply a specified function to each element in the RDD, usually to perform some side-effect operations such as printing, saving to the database, etc.

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