Column Selection DSL improvements #318
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| df.select { Person::name and Person::age } | ||
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| // range of columns | ||
| df.select { Person::name..Person::age } |
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not weirder than "name".."age" imo
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Of course not, I mean totally the range of columns based on name, I could imagine ranging the ordered things or alphabetically, but not the range of column names in the structure, is this order guaranteed by compiler or somehow?
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Nope, that's impossible afaik. However, it's still very useful to select multiple columns quickly. But, as with all non-typesafe operations (resulting in Any? types), it works best in Jupyter or with the upcoming plugin, which generate accessors on the fly.
# Conflicts: # core/generated-sources/src/main/kotlin/org/jetbrains/kotlinx/dataframe/api/ColumnsSelectionDsl.kt # core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/api/ColumnsSelectionDsl.kt
# Conflicts: # core/generated-sources/src/main/kotlin/org/jetbrains/kotlinx/dataframe/api/ColumnsSelectionDsl.kt # core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/api/ColumnsSelectionDsl.kt
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If we don't merge this PR, it will be joint with #331, since that builds on top of this PR adding docs and other missing functions |
Based on #317
I went over the Column Selection DSL and added support for KProperties everywhere.
Additionally, I saw there were some missing APIs for Strings as well, like
select { "myGroup".allAfter("someCol") },select { "myCol".groups { true } }etc.Finally, I renamed
allUntiltoallUpTo, as "until" means excluding the last one, while "up to" does not. And I renamedallSincetoallFrom.Docs are updated too.