last package:bytestring

O(1) Extract the last element of a ByteString, which must be finite and non-empty. An exception will be thrown in the case of an empty ByteString. This is a partial function, consider using unsnoc instead.

O(1) Extract the last element of a packed string, which must be non-empty.

O(n/c) Extract the last element of a ByteString, which must be finite and non-empty. This is a partial function, consider using unsnoc instead.

O(1) Extract the last element of a ShortByteString, which must be finite and non-empty. An exception will be thrown in the case of an empty ShortByteString. This is a partial function, consider using unsnoc instead.

A variety of last for non-empty ByteStrings. unsafeLast omits the check for the empty case. As with unsafeHead, the programmer must provide a separate proof that the ByteString is non-empty.