init research

2026-02-08 11:20:43 -10:00
commit bdf064f54d
3041 changed files with 1592200 additions and 0 deletions
@@ -0,0 +1,18 @@
+import org.jetbrains.kotlinx.dataframe.*
+import org.jetbrains.kotlinx.dataframe.annotations.*
+import org.jetbrains.kotlinx.dataframe.api.*
+import org.jetbrains.kotlinx.dataframe.io.*
+
+fun box(): String {
+   val df2 = dataFrameOf("id", "name", "preStage")(
+        1, "11", null,
+        2, "22", 1,
+        3, "33", null,
+    ).group { id and name and preStage }.into("achievements")
+
+    val df3 = df2
+        .filter { achievements.preStage != null }
+        .join(df2) { achievements.preStage.match(right.achievements.id) }
+    df3.achievements.name1
+    return "OK"
+}