object DatasetExtensions
Contains methods for manipulating spark dataframes and datasets.
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- implicit final class MMLDataFrame extends AnyVal
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- def findUnusedColumnName(prefix: String, df: Dataset[_]): String
- def findUnusedColumnName(prefix: String, schema: StructType): String
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def
findUnusedColumnName(prefix: String)(columnNames: Set[String]): String
Finds an unused column name given initial column name and a list of existing column names.
Finds an unused column name given initial column name and a list of existing column names. The unused column name will be given prefix with a number appended to it, eg "testColumn_5". There will be an underline between the column name and the number appended.
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The unused column name.
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