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-module(array_util).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% TYPES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% EXPORTS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-export
(
[
any/2,
none/2,
all/2,
mapiff/3
]
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% LOCAL FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-spec any_internals
(
fun((any()) -> boolean()),
array:array(any()),
non_neg_integer()
)
-> boolean().
any_internals (_, _, 0) ->
false;
any_internals (Fun, Array, PrevIX) ->
IX = (PrevIX - 1),
case Fun(array:get(IX, Array)) of
true -> true;
_ -> any_internals(Fun, Array, IX)
end.
-spec all_internals
(
fun((any()) -> boolean()),
array:array(any()),
non_neg_integer()
)
-> boolean().
all_internals (_, _, 0) ->
true;
all_internals (Fun, Array, PrevIX) ->
IX = (PrevIX - 1),
case Fun(array:get(IX, Array)) of
true -> any_internals(Fun, Array, IX);
_ -> false
end.
-spec mapiff_internals
(
fun((any()) -> boolean()),
fun((any()) -> any()),
array:array(any()),
list(non_neg_integer()),
non_neg_integer()
)
-> {array:array(any()), list(non_neg_integer())}.
mapiff_internals (_, _, Array, IXList, 0) ->
{Array, IXList};
mapiff_internals (Cond, Map, Array, IXList, PrevIX) ->
IX = (PrevIX - 1),
Elem = array:get(IX, Array),
case Cond(Elem) of
false -> mapiff_internals(Cond, Map, Array, IXList, IX);
_ ->
mapiff_internals
(
Cond,
Map,
array:set(IX, Map(Elem), Array),
[IX|IXList],
IX
)
end.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% EXPORTED FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-spec any (fun((any()) -> boolean()), array:array(any())) -> boolean().
any (Fun, Array) ->
any_internals(Fun, Array, array:size(Array)).
-spec all (fun((any()) -> boolean()), array:array(any())) -> boolean().
all (Fun, Array) ->
all_internals(Fun, Array, array:size(Array)).
-spec none (fun((any()) -> boolean()), array:array(any())) -> boolean().
none (Fun, Array) ->
not any(Fun, Array).
-spec mapiff
(
fun((any()) -> boolean()),
fun((any()) -> any()),
array:array(any())
)
-> {array:array(any()), list(non_neg_integer())}.
mapiff (Cond, Map, Array) ->
mapiff_internals(Cond, Map, Array, [], array:size(Array)).
|
