dropWhile package:bytestring

dropWhile :: (Word8 -> Bool) -> ByteString -> ByteString
bytestring Data.ByteString Data.ByteString.Lazy
Similar to dropWhile, drops the longest (possibly empty) prefix of elements satisfying the predicate and returns the remainder.
dropWhile :: (Char -> Bool) -> ByteString -> ByteString
bytestring Data.ByteString.Char8 Data.ByteString.Lazy.Char8
dropWhile p xs returns the suffix remaining after takeWhile p xs.
dropWhile :: (Word8 -> Bool) -> ShortByteString -> ShortByteString
bytestring Data.ByteString.Short Data.ByteString.Short.Internal
Similar to dropWhile, drops the longest (possibly empty) prefix of elements satisfying the predicate and returns the remainder. Note: copies the entire byte array
dropWhileEnd :: (Word8 -> Bool) -> ByteString -> ByteString
bytestring Data.ByteString
Similar to dropWhileEnd, drops the longest (possibly empty) suffix of elements satisfying the predicate and returns the remainder. dropWhileEnd p is equivalent to reverse . dropWhile p . reverse.
dropWhileEnd :: (Char -> Bool) -> ByteString -> ByteString
bytestring Data.ByteString.Char8
dropWhileEnd p xs returns the prefix remaining after takeWhileEnd p xs.
dropWhileEnd :: (Word8 -> Bool) -> ByteString -> ByteString
bytestring Data.ByteString.Lazy
Similar to dropWhileEnd, drops the longest (possibly empty) suffix of elements satisfying the predicate and returns the remainder. dropWhileEnd p is equivalent to reverse . dropWhile p . reverse. 
>>> {-# LANGUAGE OverloadedLists #-)

>>> dropWhileEnd even [1,2,3,4,6]
[1,2,3]
dropWhileEnd :: (Char -> Bool) -> ByteString -> ByteString
bytestring Data.ByteString.Lazy.Char8
Similar to dropWhileEnd, drops the longest (possibly empty) suffix of elements satisfying the predicate and returns the remainder. dropWhileEnd p is equivalent to reverse . dropWhile p . reverse.
dropWhileEnd :: (Word8 -> Bool) -> ShortByteString -> ShortByteString
bytestring Data.ByteString.Short Data.ByteString.Short.Internal
Similar to dropWhileEnd, drops the longest (possibly empty) suffix of elements satisfying the predicate and returns the remainder. dropWhileEnd p is equivalent to reverse . dropWhile p . reverse.