28 Immutable collections with var
One thing to note is the difference between the
-== etc functions regarding mutalbe and immutable collections.
- For immutable collections - they are not methods of the collection (since it’s not modifiable) but if used on an immutable collection declared with
valthen the Scala compier expands them to
variable = variable op param. (seel on the left for an example)
- For mutable collections - they are actually methods on the collection, and they modify the collection when used.