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extractor-objects.md: Option[Seq[T]] is useful when the number of values isn't fixed #843

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extractor-objects.md: Option[Seq[T]] is useful when the number of values isn't fixed #843

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2 changes: 1 addition & 1 deletion _tour/extractor-objects.md
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Expand Up @@ -57,4 +57,4 @@ The return type of an `unapply` should be chosen as follows:
* If it returns a single sub-value of type T, return an `Option[T]`
* If you want to return several sub-values `T1,...,Tn`, group them in an optional tuple `Option[(T1,...,Tn)]`.

Sometimes, the number of sub-values is fixed and we would like to return a sequence. For this reason, you can also define patterns through `unapplySeq` which returns `Option[Seq[T]]` This mechanism is used for instance in pattern `case List(x1, ..., xn)`.
Sometimes, the number of sub-values isn't fixed and we would like to return a sequence. For this reason, you can also define patterns through `unapplySeq` which returns `Option[Seq[T]]` This mechanism is used for instance in pattern `case List(x1, ..., xn)`.