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## What changes were proposed in this pull request? Seems R's substr API treats Scala substr API as zero based and so subtracts the given starting position by 1. Because Scala's substr API also accepts zero-based starting position (treated as the first element), so the current R's substr test results are correct as they all use 1 as starting positions. ## How was this patch tested? Modified tests. Author: Liang-Chi Hsieh <viirya@gmail.com> Closes #20464 from viirya/SPARK-23291. |
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