Instance Method

removeFirst()

Removes and returns the first element of the collection.

Declaration

@discardableResult mutating func removeFirst() -> Self.Element
Available when Self is SubSequence.

Return Value

The first element of the collection.

Discussion

The collection must not be empty.

Complexity: O(1)

See Also

Selecting and Excluding Elements

func popFirst() -> Self.Element?

Removes and returns the first element of the collection.

Available when Self is SubSequence.
func removeFirst(Int)

Removes the specified number of elements from the beginning of the collection.

Available when Self is SubSequence.