Prolog: split lists exercises into two groups

3 files changed, 91 insertions, 0 deletions

diff --git a/prolog/problems/lists_advanced/sublist_2/common.py b/prolog/problems/lists_advanced/sublist_2/common.py
new file mode 100644
index 0000000..6187ebc
--- /dev/null
+++ b/prolog/problems/lists_advanced/sublist_2/common.py
@@ -0,0 +1,53 @@
+# coding=utf-8
+
+from operator import itemgetter
+import prolog.engine
+import server.problems
+
+id = 117
+number = 24
+visible = False
+facts = None
+
+solution = '''\
+conc117([], L, L).
+conc117([H|T], L2, [H|L]) :-
+  conc117(T, L2, L).
+sublist(L, S) :-
+  conc117(_, T, L),
+  conc117(S, _, T).
+'''
+
+test_cases = [
+    ('sublist([], X)',
+        [{'X': '[]'}]),
+    ('sublist([e, h, A, B, C], [f, a, e])',
+        [{'A': 'f', 'B': 'a', 'C': 'e'}]),
+    ('sublist([e, A, l, B], [r, C, k])',
+        [{'A': 'r', 'B': 'k', 'C': 'l'}]),
+    ('setof(L, sublist([a, b, c], L), X)',
+        [{'X': '[[], [a], [a, b], [a, b, c], [b], [b, c], [c]]'}]),
+]
+
+def test(code, aux_code):
+    n_correct = 0
+    engine_id = None
+    try:
+        engine_id, output = prolog.engine.create(code=code+aux_code, timeout=1.0)
+        if engine_id is not None and 'error' not in map(itemgetter(0), output):
+            # Engine successfully created, and no syntax error in program.
+            for query, answers in test_cases:
+                if prolog.engine.check_answers(engine_id, query=query, answers=answers, timeout=1.0):
+                    n_correct += 1
+    except socket.timeout:
+        pass
+    finally:
+        if engine_id:
+            prolog.engine.destroy(engine_id)
+
+    hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_cases)}}]
+    return n_correct, len(test_cases), hints
+
+def hint(code, aux_code):
+    # TODO
+    return []
diff --git a/prolog/problems/lists_advanced/sublist_2/en.py b/prolog/problems/lists_advanced/sublist_2/en.py
new file mode 100644
index 0000000..2697d9b
--- /dev/null
+++ b/prolog/problems/lists_advanced/sublist_2/en.py
@@ -0,0 +1,19 @@
+# coding=utf-8
+
+name = 'sublist/2'
+slug = 'generate sublists of a list'
+
+description = '''\
+<p><code>sublist(L, SL)</code>: <code>SL</code> is a continuous sublist of the list <code>L</code>.</p>
+<pre>
+?- sublist([1,2,3], X).
+  X = [] ;
+  X = [1] ;
+  X = [1,2] ;
+  X = [1,2,3] ;
+  X = [2] ;
+  X = [2,3] ;
+  X = [3].
+</pre>'''
+
+hint = {}
diff --git a/prolog/problems/lists_advanced/sublist_2/sl.py b/prolog/problems/lists_advanced/sublist_2/sl.py
new file mode 100644
index 0000000..cc42219
--- /dev/null
+++ b/prolog/problems/lists_advanced/sublist_2/sl.py
@@ -0,0 +1,19 @@
+# coding=utf-8
+
+name = 'sublist/2'
+slug = 'Generiraj vse podsezname danega seznama'
+
+description = '''\
+<p><code>sublist(L, SL)</code>: <code>SL</code> je podseznam seznama <code>L</code>. Predikat naj vrne vse možne podsezname, enega po enega.</p>
+<pre>
+?- sublist([1,2,3], X).
+  X = [] ;
+  X = [1] ;
+  X = [1,2] ;
+  X = [1,2,3] ;
+  X = [2] ;
+  X = [2,3] ;
+  X = [3].
+</pre>'''
+
+hint = {}