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From JF Chen <>
Subject How to deal with context dependent computing?
Date Thu, 23 Aug 2018 02:52:27 GMT
For example, I have some data with timstamp marked as category A and B, and
ordered by time. Now I want to calculate each duration from A to B. In
normal program, I can use the  flag bit to record the preview data if it is
A or B, and then calculate the duration. But in Spark Dataframe, how to do


Junfeng Chen

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