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271 righe
7.8 KiB
271 righe
7.8 KiB
-module(utList).
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-define(TRUE, true).
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-define(FALSE, false).
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-define(BREAK, break).
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-define(BREAK(Value), {?BREAK, Value}).
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-define(CONTINUE, continue).
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-define(CONTINUE(Value), {?CONTINUE, Value}).
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-define(UNDEFINED, undefined).
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-compile([export_all, nowarn_export_all]).
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-spec getListVal(term(), list()) -> term().
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getListVal(Key, List) ->
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case lists:keyfind(Key, 1, List) of
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{_Key, Value} ->
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Value;
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_ ->
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undefined
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end.
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-spec getListVal(term(), list(), term()) -> term().
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getListVal(Key, List, Default) ->
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case lists:keyfind(Key, 1, List) of
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{_Key, Value} ->
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Value;
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_ ->
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Default
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end.
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while(Fun, CurData) ->
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case Fun(CurData) of
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?BREAK -> CurData;
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?BREAK(BreakData) -> BreakData;
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?CONTINUE ->
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while(Fun, CurData);
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?CONTINUE(Continue) ->
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while(Fun, Continue)
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end.
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%% For loop.
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for(N, Fun) ->
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for(1, N, 1, Fun).
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for(Start, End, Fun) ->
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for(Start, End, 1, Fun).
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for(End, End, _Step, Fun) ->
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Fun(End);
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for(Start, End, Step, Fun) ->
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Fun(Start),
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for(Start + Step, End, Step, Fun).
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%% 带返回状态的for循环 @return {ok, State}
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forWithState(Index, Max, _Fun, State) when Index > Max ->
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{ok, State};
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forWithState(Max, Max, Fun, State) ->
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Fun(Max, State);
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forWithState(Index, Max, Fun, State) ->
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{ok, NewState} = Fun(Index, State),
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forWithState(Index + 1, Max, Fun, NewState).
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forWhile(Fun, State) ->
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forWhile(?CONTINUE, Fun, State).
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forWhile(?BREAK, _Fun, State) ->
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State;
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forWhile(?CONTINUE, Fun, State) ->
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{Next, NewState} = Fun(State),
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forWhile(Next, Fun, NewState).
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%% 可以重复获取
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randFormList([]) ->
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false;
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randFormList(List) ->
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lists:nth(rand:uniform_s(1, length(List)), List).
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%% 不能重复获取
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randFormListOnce([]) ->
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{false, []};
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randFormListOnce(List) ->
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Nth = rand:uniform_s(1, length(List)),
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NthData = lists:nth(Nth, List),
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{NthData, lists:delete(NthData, List)}.
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randDelete(RemainList) ->
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Pos = rand:uniform_s(1, length(RemainList)),
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remove_nth(Pos, RemainList).
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randDelete(DelCount, List) ->
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FunDel =
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fun(_, RemainList) ->
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RemainList(RemainList)
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end,
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lists:foldl(FunDel, List, lists:seq(1, DelCount)).
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%%随机从集合中选出指定个数的元素length(List) >= Num
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%%[1,2,3,4,5,6,7,8,9]中选出三个不同的数字[1,2,4]
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getRandFromList(Num, List) ->
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ListSize = length(List),
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FunDel =
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fun(N, List1) ->
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Random = rand:uniform_s(1, (ListSize - N + 1)),
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Elem = lists:nth(Random, List1),
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lists:delete(Elem, List1)
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end,
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Result = lists:foldl(FunDel, List, lists:seq(1, Num)),
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List -- Result.
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%%打乱列表函数 List =[] 返回 打乱后列表 List2 元素小于300多个的时候 使用confuseList1 大于300多个的时候使用confuseList2
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%% ----------------------------------------------------
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confuseList1(List) ->
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TupleList = list_to_tuple(List),
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TupleSize = tuple_size(TupleList),
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confuseList1(TupleSize, TupleSize, TupleList).
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confuseList1(0, _TupleSize, TupleList) -> tuple_to_list(TupleList);
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confuseList1(Index, TupleSize, TupleList) ->
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ChangeIndex = rand:uniform(TupleSize),
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Value1 = element(Index, TupleList),
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Value2 = element(ChangeIndex, TupleList),
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TupleList1 = setelement(Index, TupleList, Value2),
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TupleList2 = setelement(ChangeIndex, TupleList1, Value1),
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confuseList1(Index - 1, TupleSize, TupleList2).
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confuseList2(List) ->
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Array = array:from_list(List),
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ArraySize = array:size(Array),
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confuseList2(ArraySize, ArraySize, Array).
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confuseList2(0, _TupleSize, TupleList) -> array:to_list(TupleList);
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confuseList2(Index, TupleSize, TupleList) ->
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ChangeIndex = rand:uniform(TupleSize),
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Value1 = array:get(Index, TupleList),
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Value2 = array:get(ChangeIndex, TupleList),
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TupleList1 = array:set(Index, Value2, TupleList),
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TupleList2 = array:set(ChangeIndex, Value1, TupleList1),
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confuseList2(Index - 1, TupleSize, TupleList2).
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transferMaps([], Index, Map) -> {Index - 1, Map};
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transferMaps([Element | List], Index, Map) ->
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transferMaps(List, Index + 1, Map#{Index => Element}).
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confuseList3(List) ->
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{Cnt, Map} = transferMaps(List, 1, #{}),
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confuseList3(Cnt, Cnt, Map).
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confuseList3(0, _Size, Map) -> maps:values(Map);
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confuseList3(Index, Size, Map) ->
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ChangeIndex = rand:uniform(Size),
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#{Index := Value1, ChangeIndex := Value2} = Map,
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confuseList3(Index - 1, Size, Map#{Index := Value2, ChangeIndex := Value1}).
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%%根数Tuple元素数量，把List转成Tuple 返回：{TupleList, RemainList}
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list_to_tuple(List, TupleCount) ->
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list_to_tuple(List, TupleCount, []).
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list_to_tuple(List, TupleCount, Result) when length(List) >= TupleCount ->
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{List1, List2} = lists:split(TupleCount, List),
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list_to_tuple(List2, TupleCount, [list_to_tuple(List1) | Result]);
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list_to_tuple(List, _TupleCount, Result) ->
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{lists:reverse(Result), List}.
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%%计算元素在列表中出现几次(5, [1,2,3,5,5,5,3]) ----> 3
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repeatCount(Element, List) ->
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repeatCount(Element, List, 0).
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repeatCount(Element, List, Count) ->
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case lists:member(Element, List) of
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false -> Count;
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true ->
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repeatCount(Element, lists:delete(Element, List), Count + 1)
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end.
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remove_nth(RemainList, Pos) ->
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Head = lists:sublist(RemainList, 1, Pos - 1),
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End = lists:sublist(RemainList, Pos + 1, length(RemainList)),
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Head ++ End.
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%%删除指定元素返回：(5, [1,2,4,4,5,5,4,5]) -> [1,2,4,4,4]
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remove_element(Element, List) ->
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case lists:member(Element, List) of
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false -> List;
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true -> remove_element(Element, lists:delete(Element, List))
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end.
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%%删除重复元素 [1,2,3,2,3,4] ---> [1,2,3,4]
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remove_repeat(List) ->
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remove_repeat(List, []).
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remove_repeat([], Result) ->
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Result;
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remove_repeat([L | List], Result) ->
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case lists:member(L, Result) of
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false -> remove_repeat(List, Result ++ [L]);
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true -> remove_repeat(List, Result)
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end.
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%%根据Key去查List中元素的Nth位相等的匹配到的元素Fun(Element)返回
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find_elements(Key, Nth, List, Fun) ->
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InnerFun = fun(Element) ->
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case element(Nth, Element) =:= Key of
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true ->
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{true, Fun(Element)};
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false ->
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false
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end
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end,
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lists:filtermap(InnerFun, List).
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%%对list进行去重，排序
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%%Replicat 0不去重，1去重
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%%Sort 0不排序，1排序
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filter_list(List, Replicat, Sort) ->
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if Replicat == 0 andalso Sort == 0 ->
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List;
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true ->
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if Replicat == 1 andalso Sort == 1 ->
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lists:usort(List);
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true ->
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if Sort == 1 ->
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lists:sort(List);
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true ->
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lists:reverse(filter_replicat(List, []))
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end
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end
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end.
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%%list去重
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filter_replicat([], List) ->
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List;
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filter_replicat([H | Rest], List) ->
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Bool = lists:member(H, List),
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List1 =
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if Bool == true ->
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[[] | List];
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true ->
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[H | List]
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end,
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List2 = lists:filter(fun(T) -> T =/= [] end, List1),
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filter_replicat(Rest, List2).
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%%交集
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get_intersection_list(A, B) when is_list(A) andalso is_list(B) ->
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lists:filter(fun(X) -> lists:member(X, A) end, B).
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%%并集
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get_unite_list(A, B) when is_list(A) andalso is_list(B) ->
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C = A ++ B,
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lists:usort(C).
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%%差集
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get_subtract_list(A, B) when is_list(A) andalso is_list(B) ->
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Insection = get_intersection_list(A, B),
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Unite = get_unite_list(A, B),
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lists:filter(fun(X) -> lists:member(X, Insection) =:= false end, Unite).
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merge(L) ->
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merge(L, []).
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merge([{Key, Value} | T], AccList) ->
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NewAccList =
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case lists:keyfind(Key, 1, AccList) of
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false ->
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[{Key, Value} | AccList];
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{Key, OldValue} ->
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lists:keyreplace(Key, 1, AccList, {Key, OldValue + Value})
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end,
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merge(T, NewAccList);
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merge([], AccList) ->
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AccList.
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