dropWhile package:text-short

Remove longest prefix satisfying given predicate.

dropWhile p t == snd (span p t)

>>> dropWhile (< 'c') "abcdabcd"
"cdabcd"

Remove longest suffix satisfying given predicate.

dropWhileEnd p t == fst (spanEnd p t)

>>> dropWhileEnd (>= 'c') "abcdabcd"
"abcdab"