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- scala> val a = Array("col1", "col2")
- a: Array[String] = Array(col1, col2)
- val edges = all_edges.select(a:_*)
- <console>:27: error: overloaded method value select with alternatives:
- (col: String,cols: String*)org.apache.spark.sql.DataFrame <and>
- (cols: org.apache.spark.sql.Column*)org.apache.spark.sql.DataFrame
- cannot be applied to (String)
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