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Small note to describe Nil #1474

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Sep 17, 2019
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Small note to describe Nil #1474

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Small note to describe Nil
manishpatelUK Aug 1, 2019
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Update generic-classes.md
manishpatelUK Aug 2, 2019
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Update generic-classes.md
manishpatelUK Aug 2, 2019
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Expand Up @@ -31,7 +31,7 @@ class Stack[A] {
```
This implementation of a `Stack` class takes any type `A` as a parameter. This means the underlying list, `var elements: List[A] = Nil`, can only store elements of type `A`. The procedure `def push` only accepts objects of type `A` (note: `elements = x :: elements` reassigns `elements` to a new list created by prepending `x` to the current `elements`).

`Nil` here is a special case of `List` and is not to be confused with `Null`. It is a `List` of zero length.
`Nil` here is a special case of `List` and is not to be confused with `Null`. It is simply an empty list.

## Usage

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