摘要："scala/spec/03 types.md" title: Types layout: default chapter: 3 Types We distinguish between first order types and type constructors, which take type 阅读全文

摘要：Weak Conformance In some situations Scala uses a more general conformance relation. A type S weakly conforms to a type T, written S 阅读全文

摘要：``` conda info -e # conda environments: # dlcv /Users/enzhao/suanec/libs/anaconda2/envs/dlcv py36 /Users/enzhao/suanec/libs/anaconda2/envs/py36 root ... 阅读全文

摘要：异步不保序，但大作业执行时间后移。 .set("spark.scheduler.mode", "FAIR") 公平调度，充分使用集群资源。 "Spark Doc" def collectAsync(): FutureAction[Seq[T]] Returns a future for retrie 阅读全文

摘要：maven 与划定的范围存在冲突，则以配置为准。 阅读全文