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Distinct - It creates a copy of a given collection without duplicated elements DistinctBy - It also creates a copy given collection by kee...
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Java is impatient, So it does things eagerly, Doing lazy things with Java is not straightforward! Let's first understand What do we m...
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Scala Collection - Combinations combinations creates the list of all the possible combinations from given collection by taking "n"...
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MongoDB is NoSQL Open Source database. It's document based database. Let's take an example to store cricket bat object: Cricket...
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Shuffle operation is the most expensive operation in Spark as takes a lot of I/O, networks calls. Why we need shuffle operation: While ru...
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Sometimes it is necessary to express that the type of an object is a subtype of several other types. In Scala, this can be expressed with t...
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apply and unapply are the special methods in Scala. The apply method works like a constructor. Unapply uses to extract the object. The ... -
RDD stands for resilient (restore in case of failure) distributed dataset. RDD is an immutable structure/collection. RDD divide the data in...
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Eclipse Idea Usage F3 ctrl + b go to declaration (e.g. go to method) ctrl + l ctrl + g go to line ctrl + y ctrl + shift + z red...
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Error Code 10005 While adding foreign key constraint i got 1005 error code, weird thing about this error is that it tells " can'...
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