25 lines
588 B
Kotlin
Vendored
25 lines
588 B
Kotlin
Vendored
import org.jetbrains.kotlinx.dataframe.*
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import org.jetbrains.kotlinx.dataframe.annotations.*
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import org.jetbrains.kotlinx.dataframe.api.*
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import org.jetbrains.kotlinx.dataframe.io.*
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data class Record(val a: String, val b: Int)
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fun box(): String {
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val df = listOf(Record("112", 42)).toDataFrame(maxDepth = 1)
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val df1 = df.group { a and b }.into("c")
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df1.c.a
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df1.c.b
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val df2 = df1.group { c }.into("d")
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df2.d.c.a
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val df3 = df2.ungroup { d.c and d }
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df3.c.a
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df3.c.b
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val df4 = df2.ungroup { d }.ungroup { c }
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df4.a
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df4.b
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return "OK"
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}
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