+=(_:_:)

Adds the elements of a sequence to the end of the array.

Adds the elements of a sequence or collection to the end of this collection.

Creates a new collection by concatenating the elements of a sequence and a collection.

Creates a new collection by concatenating the elements of a collection and a sequence.

Creates a new collection by concatenating the elements of two collections.

Appends the elements of a sequence to a range-replaceable collection.