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If the middle element is our item, then we're done! 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","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":3,"num_loc":18,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2026-04-08T10:41:42.000Z","is_out_of_date":false,"language":"prolog","author":{"handle":"Juanpramo"},"exercise":{"title":"جست‌وجوی دودویی","icon_url":"https://assets.exercism.org/exercises/binary-search.svg"},"track":{"title":"Prolog","icon_url":"https://assets.exercism.org/tracks/prolog.svg","highlightjs_language":"prolog"},"links":{"public_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/solutions/Juanpramo","private_iterations_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/iterations"}},{"uuid":"d4f84a9d79e241558979ab1193bf4c5c","snippet":"% Exercism binary_search find(List, Value, Index) :- sort(List, SortedList), length(SortedList, Length), find_helper(SortedList, Value, 0, Length, Index). find_helper(List, Value, Lower, Upper, Index) :- Lower =< Upper, MidIndex is (Lower + Upper) // 2, ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":2,"num_loc":12,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2026-06-10T20:33:19.000Z","is_out_of_date":false,"language":"prolog","author":{"handle":"moodymarmot"},"exercise":{"title":"جست‌وجوی دودویی","icon_url":"https://assets.exercism.org/exercises/binary-search.svg"},"track":{"title":"Prolog","icon_url":"https://assets.exercism.org/tracks/prolog.svg","highlightjs_language":"prolog"},"links":{"public_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/solutions/moodymarmot","private_iterations_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/iterations"}},{"uuid":"f0e2dc04b2504908a5245ff089345272","snippet":"%find(List, Value, Index). find([Value], Value, 0). find(List, Value, N) :- length(List, D), N is D // 2, nth0(N,List,Elem), Elem =:= Value. find(List, Value, Index) :- length(List, D), ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":21,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2026-06-14T19:00:45.000Z","is_out_of_date":false,"language":"prolog","author":{"handle":"AntonioDePadua-Rodriguez"},"exercise":{"title":"جست‌وجوی دودویی","icon_url":"https://assets.exercism.org/exercises/binary-search.svg"},"track":{"title":"Prolog","icon_url":"https://assets.exercism.org/tracks/prolog.svg","highlightjs_language":"prolog"},"links":{"public_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/solutions/AntonioDePadua-Rodriguez","private_iterations_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/iterations"}},{"uuid":"73893b8213a643eaac03308178f17cee","snippet":"% Main predicate find(List, Target, Index) :- is_sorted(List), % Verify list is sorted binary_search(List, Target, 0, Index). % Binary search helper low/high bounds binary_search(List, Target, Low, Index) :- length(List, Length), Low < Length, Mid is (Low + Length - 1) // 2, ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":40,"iteration_status":"analyzing","published_iteration_head_tests_status":"passed","published_at":"2025-10-09T22:03:18.000Z","is_out_of_date":false,"language":"prolog","author":{"handle":"baniks2001"},"exercise":{"title":"جست‌وجوی دودویی","icon_url":"https://assets.exercism.org/exercises/binary-search.svg"},"track":{"title":"Prolog","icon_url":"https://assets.exercism.org/tracks/prolog.svg","highlightjs_language":"prolog"},"links":{"public_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/solutions/baniks2001","private_iterations_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/iterations"}},{"uuid":"c9222985885540c3931ebb8f1877e9ea","snippet":"% Binary search implementation - finds Value in sorted List at Index (0-based) find(List, Value, Index) :- length(List, Len), binary_search(List, Value, 0, Len, Index). binary_search(List, Value, Left, Right, Index) :- Left < Right, Mid is (Left + Right) // 2, nth0(Mid, List, MidValue), ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":2,"num_loc":15,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2025-10-14T01:41:02.000Z","is_out_of_date":false,"language":"prolog","author":{"handle":"kenokabe"},"exercise":{"title":"جست‌وجوی دودویی","icon_url":"https://assets.exercism.org/exercises/binary-search.svg"},"track":{"title":"Prolog","icon_url":"https://assets.exercism.org/tracks/prolog.svg","highlightjs_language":"prolog"},"links":{"public_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/solutions/kenokabe","private_iterations_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/iterations"}},{"uuid":"b08a02640ba8496dbde0b38998e59e50","snippet":"get_middle_element(List, MiddleIndex, Middle) :- length(List, Length), MiddleIndex is Length // 2, nth0(MiddleIndex, List, Middle), !. find(List, Value, Index) :- find(List, Value, 0, Index). find(List, Value, CurrIndex, Index) :- get_middle_element(List, MiddleIndex, Value), Index is CurrIndex + MiddleIndex, !. 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","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":4,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2026-05-28T16:39:48.000Z","is_out_of_date":false,"language":"prolog","author":{"handle":"Elisammc"},"exercise":{"title":"جست‌وجوی دودویی","icon_url":"https://assets.exercism.org/exercises/binary-search.svg"},"track":{"title":"Prolog","icon_url":"https://assets.exercism.org/tracks/prolog.svg","highlightjs_language":"prolog"},"links":{"public_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/solutions/Elisammc","private_iterations_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/iterations"}},{"uuid":"1d775ed79fcf499a8ba911aecf6b1aa7","snippet":"find(List, Value, Index) :- length(List, Length), find(List, Value, 1, Length, Index). find(List, Value, Lower, Upper, Index) :- Lower =< Upper, Middle is (Lower + Upper) // 2, nth1(Middle, List, Element), ( Value < Element -> Upper1 is Middle - 1, find(List, Value, Lower, Upper1, Index) ; Value > Element -> ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":11,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2025-02-10T10:35:20.000Z","is_out_of_date":false,"language":"prolog","author":{"handle":"gumminoppe"},"exercise":{"title":"جست‌وجوی دودویی","icon_url":"https://assets.exercism.org/exercises/binary-search.svg"},"track":{"title":"Prolog","icon_url":"https://assets.exercism.org/tracks/prolog.svg","highlightjs_language":"prolog"},"links":{"public_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/solutions/gumminoppe","private_iterations_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/iterations"}},{"uuid":"d48fe911c0f74983a1c66eaeb095ba89","snippet":"find([Value], Value, 0). find(List, Value, Index) :- length(List, Len), Len > 1, HeadLen is Len div 2, append(Head, Tail, List), length(Head, HeadLen), Tail = [Mid|_], ( Value < Mid, find(Head, Value, Index), !; find(Tail, Value, Tmp), Index is Tmp + HeadLen ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":11,"iteration_status":"analyzing","published_iteration_head_tests_status":"passed","published_at":"2025-02-11T08:57:56.000Z","is_out_of_date":false,"language":"prolog","author":{"handle":"liuq901"},"exercise":{"title":"جست‌وجوی دودویی","icon_url":"https://assets.exercism.org/exercises/binary-search.svg"},"track":{"title":"Prolog","icon_url":"https://assets.exercism.org/tracks/prolog.svg","highlightjs_language":"prolog"},"links":{"public_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/solutions/liuq901","private_iterations_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/iterations"}},{"uuid":"afc7bc38a8704003ae20cb3a96223738","snippet":"find(List, Value, Index, Left, Right):- Left =< Right, Mid is Left + (Right - Left) div 2, nth0(Mid, List, Val1), (Val1 == Value -> Index = Mid; Val1 > Value -> Right1 is Mid - 1, find(List, Value, Index, Left, Right1); Val1 < Value -> Left1 is Mid +1, ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":15,"iteration_status":"analyzing","published_iteration_head_tests_status":"passed","published_at":"2025-07-23T19:21:41.000Z","is_out_of_date":false,"language":"prolog","author":{"handle":"DimitarIvanov7"},"exercise":{"title":"جست‌وجوی دودویی","icon_url":"https://assets.exercism.org/exercises/binary-search.svg"},"track":{"title":"Prolog","icon_url":"https://assets.exercism.org/tracks/prolog.svg","highlightjs_language":"prolog"},"links":{"public_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/solutions/DimitarIvanov7","private_iterations_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/iterations"}},{"uuid":"eeaca9ac72d349afa1a6a95834535ebe","snippet":"find(List, Value, Index) :- sort(List, SortedList), length(SortedList, Length), NextId is Length // 2, binary_search(SortedList, Value, NextId, 0, Length, Index). binary_search(List, Value, Id, Left, Right, Target) :- Id >= Left, Id < Right, nth0(Id, List, Num), ( ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":20,"iteration_status":"analyzing","published_iteration_head_tests_status":"passed","published_at":"2025-08-14T04:38:31.000Z","is_out_of_date":false,"language":"prolog","author":{"handle":"mortalreminderpt"},"exercise":{"title":"جست‌وجوی دودویی","icon_url":"https://assets.exercism.org/exercises/binary-search.svg"},"track":{"title":"Prolog","icon_url":"https://assets.exercism.org/tracks/prolog.svg","highlightjs_language":"prolog"},"links":{"public_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/solutions/mortalreminderpt","private_iterations_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/iterations"}},{"uuid":"93fa59d2faaf425cb65afac7c5b5331d","snippet":"find([X], X, 0) :- !. find(Xs, X, Index) :- length(Xs, Len), Len_2 is Len div 2, split_at(Len_2, Xs, Pre, Elem, Post), ( Elem =:= X -> Index = Len_2 ; Elem < X -> find(Post, X, Index0), Index is Index0 + Len_2 + 1 ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":18,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2024-03-29T03:44:11.000Z","is_out_of_date":false,"language":"prolog","author":{"handle":"jinwoo"},"exercise":{"title":"جست‌وجوی دودویی","icon_url":"https://assets.exercism.org/exercises/binary-search.svg"},"track":{"title":"Prolog","icon_url":"https://assets.exercism.org/tracks/prolog.svg","highlightjs_language":"prolog"},"links":{"public_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/solutions/jinwoo","private_iterations_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/iterations"}},{"uuid":"44084363a792470db9ae543d4d13e738","snippet":"% find(+List, +Value, -Index) % Performs binary search on a sorted list. find(List, Value, Index) :- length(List, Len), Len > 0, binary_search(List, Value, 0, Len, Index). % binary_search(+List, +Value, +Low, +High, -Index) binary_search(_, _, Low, High, _) :- Low >= High, !, ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":20,"iteration_status":"analyzing","published_iteration_head_tests_status":"passed","published_at":"2025-10-09T22:15:15.000Z","is_out_of_date":false,"language":"prolog","author":{"handle":"June-Lian"},"exercise":{"title":"جست‌وجوی دودویی","icon_url":"https://assets.exercism.org/exercises/binary-search.svg"},"track":{"title":"Prolog","icon_url":"https://assets.exercism.org/tracks/prolog.svg","highlightjs_language":"prolog"},"links":{"public_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/solutions/June-Lian","private_iterations_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/iterations"}},{"uuid":"d17bba8978ca4387a8a17d5f92f3060f","snippet":"% find(List, Value, Index) % Performs binary search on a sorted list. find(List, Value, Index) :- binary_search(List, Value, 0, Index). % Base case: empty list — value not found binary_search([], _, _, _) :- fail. ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":24,"iteration_status":"analyzing","published_iteration_head_tests_status":"passed","published_at":"2025-10-12T09:51:20.000Z","is_out_of_date":false,"language":"prolog","author":{"handle":"raymondit102"},"exercise":{"title":"جست‌وجوی دودویی","icon_url":"https://assets.exercism.org/exercises/binary-search.svg"},"track":{"title":"Prolog","icon_url":"https://assets.exercism.org/tracks/prolog.svg","highlightjs_language":"prolog"},"links":{"public_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/solutions/raymondit102","private_iterations_url":"https://exercism.org/fa/tracks/prolog/exercises/binary-search/iterations"}}],"meta":{"current_page":1,"total_count":45,"total_pages":2,"unscoped_total":45}}}}}

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