how to transform Nil to None scala

List [string] = list (a, b) you can achieve the same effect by using flatmap, which will allow you to modify the results if you need to (e.g.The result of applying pf to this scala.option 's value (if possible), or none.

Null is the one and the only instance of type null.Otherwise, we return the default.This helps us handle cases where none can occur.

1) general rules about null and option.Not even null, not unit, not none, nothing at all.

Nil uses nothing as it is a subset.If the element exists, it is an instance of some [t].In the latter example, because the type argument is erased as part of compilation it is not possible to check.

We begin with the following general rules regarding the use of null values in scala code:Null in scala is same as in java.

In scala, the option [t] class serves as a container for zero or one element of a given type t.Finally, let's end with the mother of nothingness.You can then assign its value using the some class and pass in your donut taste string of very tasty.

Because an option is a collection of zero or one elements, you can convert this list of int values by.Function dataframe.filter or dataframe.where can be used to filter out null values.

More kinda related scala answers view all scala answers » scala get file from url as string;They are null, null, nil.Returns a scala.collection.stepper for the elements of this collection.

Nothing has found uses in functions that always return an exception to handle.

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how to transform Nil to None scala
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