ef89b82d83
Simplify some codes related to DataFrame. * Calling `toAttributes` instead of a `map`. * Original `createDataFrame` creates the `StructType` and its attributes in a redundant way. Refactored it to create `StructType` and call `toAttributes` on it directly. Author: Liang-Chi Hsieh <viirya@gmail.com> Closes #4298 from viirya/refactor_df and squashes the following commits: 1d61c64 [Liang-Chi Hsieh] Revert it. f36efb5 [Liang-Chi Hsieh] Relax the constraint of toDataFrame. 2c9f370 [Liang-Chi Hsieh] Just refactor DataFrame codes. |
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