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Scala編程中常見錯誤:Error:(24, 29) value foreach is not a member of java.util.Set[String]
時間 2019-12-05
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scala
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常見
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error
value
foreach
member
java.util.set
java
util
set
string
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Scala
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問題: 在Scala編程開發中, 常常會出現相似以下的錯誤, Error:(24, 29) value foreach is not a member of java.util.Set[String] for (key <- reducedList.keySet) { ^ 或 Error:(21, 22) value filter i
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解決value toDF is not a member of org.apache.spark.rdd.RDD[People]
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