bug or feature?
Richard A. O'Keefe
Wed Apr 19 03:51:01 CEST 2006
Serge Aleynikov <> wrote that
strip_prefix(Prefix ++ Suffix, Prefix) ->
strip_prefix(String, _Prefix) -> % fixed
would be "much easier to read" than
strip_prefix(String, Prefix) ->
strip_prefix2(String, Prefix, String).
strip_prefix2(Suffix, , _String) ->
strip_prefix2([C|Tail], [C|PrefTail], String) ->
strip_prefix2(Tail, PrefTail, String);
strip_prefix2(_, _, String) ->
I don't find either of them particularly easy to read, because the
code contradicts the name. However implemented, this function DOESN'T
always strip a prefix. By the time that has been addressed with a
fair comment explaining what the function really does, there is little
to choose between these functions.
strip_prefix(List, Prefix) ->
case lists:prefix(Prefix, List)
of true -> lists:nthtail(length(Prefix), List)
; false -> List
is only one line longer than the ++ version, and seems pretty clear
(except for the non-intention-revealing name).
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