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authorTimotej Lazar <timotej.lazar@fri.uni-lj.si>2016-03-29 19:00:23 +0200
committerTimotej Lazar <timotej.lazar@fri.uni-lj.si>2016-03-29 19:00:45 +0200
commit0d32abe688f0636988090f653f75bc33616ad610 (patch)
treead2ee77fb6ed309609d6dfe414941d5baf1243f7 /prolog/problems/sorting
parent39e171d652db076dd96fe3afbc77e26aafd7fa32 (diff)
Prolog: add triggers for is_sorted/1 hints
Diffstat (limited to 'prolog/problems/sorting')
-rw-r--r--prolog/problems/sorting/is_sorted_1/common.py95
-rw-r--r--prolog/problems/sorting/is_sorted_1/sl.py61
2 files changed, 148 insertions, 8 deletions
diff --git a/prolog/problems/sorting/is_sorted_1/common.py b/prolog/problems/sorting/is_sorted_1/common.py
index 0e8a49d..dc97712 100644
--- a/prolog/problems/sorting/is_sorted_1/common.py
+++ b/prolog/problems/sorting/is_sorted_1/common.py
@@ -1,11 +1,11 @@
-# coding=utf-8
-
from operator import itemgetter
+import socket
+
import prolog.engine
-import server.problems
+from server.hints import Hint, HintPopup
id = 121
-number = 28
+number = 10
visible = False
facts = None
@@ -17,6 +17,21 @@ is_sorted([H1,H2|T]) :-
is_sorted([H2|T]).
'''
+hint_type = {
+ 'eq_instead_of_equ_markup': HintPopup('eq_instead_of_equ_markup'),
+ 'eq_instead_of_equ': Hint('eq_instead_of_equ'),
+ 'predicate_always_false': Hint('predicate_always_false'),
+ 'base_case': Hint('base_case'),
+ 'recursive_case': Hint('recursive_case'),
+ 'timeout': Hint('timeout'),
+ '[]_base_case_missing': Hint('[]_base_case_missing'),
+ 'duplicates_fail': Hint('duplicates_fail'),
+ 'H1_instead_of_H2_sent_into_recursion': Hint('H1_instead_of_H2_sent_into_recursion'),
+ 'base_case_at_len_1_missing': Hint('base_case_at_len_1_missing'),
+ 'both_heads_omitted_from_recursion': Hint('both_heads_omitted_from_recursion'),
+ 'min_used': Hint('min_used'),
+}
+
test_cases = [
('is_sorted([])',
[{}]),
@@ -32,6 +47,8 @@ test_cases = [
[{}]),
('\+ is_sorted([3, 4, 5, 6, 1, 2, 3, 0])',
[{}]),
+ ('\+ is_sorted([3, 13, 6, 39])',
+ [{}]),
]
def test(code, aux_code):
@@ -54,5 +71,73 @@ def test(code, aux_code):
return n_correct, len(test_cases), hints
def hint(code, aux_code):
- # TODO
+ tokens = prolog.util.tokenize(code)
+
+ try:
+ engine_id, output = prolog.engine.create(code=code+aux_code, timeout=1.0)
+
+ # strict equality testing instead of simple matching
+ # this is usually (but not necessarily) wrong
+ targets = [prolog.util.Token('EQ', '==')]
+ marks = [(t.pos, t.pos + len(t.val)) for t in tokens if t in targets]
+ if marks:
+ return [{'id': 'eq_instead_of_equ_markup', 'start': m[0], 'end': m[1]} for m in marks] + \
+ [{'id': 'eq_instead_of_equ'}]
+
+ if prolog.engine.ask_truthTO(engine_id, '''\
+ is_sorted([1, 3, 5, 6, 9]),
+ \+ is_sorted([1, 9, 3, 6]),
+ is_sorted([39]),
+ \+ is_sorted([])'''):
+ return [{'id': '[]_base_case_missing'}]
+
+ # H1 < H2 instead of H1 =< H2
+ if prolog.engine.ask_truthTO(engine_id, '''\
+ is_sorted([1, 3, 5, 6, 9]),
+ \+ is_sorted([1, 9, 3, 6]),
+ \+ is_sorted([1, 3, 5, 5, 7, 9])'''):
+ return [{'id': 'duplicates_fail'}]
+
+ if prolog.engine.ask_truthTO(engine_id, '''\
+ \+ is_sorted([3, 13, 1, 39]),
+ is_sorted([3, 13, 16, 39]),
+ is_sorted([3, 13, 6, 39])'''):
+ return [{'id': 'H1_instead_of_H2_sent_into_recursion'}]
+
+ if prolog.engine.ask_truthTO(engine_id, '''\
+ (is_sorted([13, 39])
+ ;
+ is_sorted([])),
+ \+ is_sorted([39])'''):
+ return [{'id': 'base_case_at_len_1_missing'}]
+
+ if prolog.engine.ask_truthTO(engine_id, '''\
+ \+ is_sorted([1, 0, 2, 25, 39]),
+ is_sorted([1, 3, 9, 16, 39]),
+ is_sorted([1, 3, 2, 16, 39])'''):
+ return [{'id': 'both_heads_omitted_from_recursion'}]
+
+ if any(t.val == 'min' for t in tokens):
+ return [{'id': 'min_used'}]
+
+ # missing/failed base case
+ if not prolog.engine.ask_truthTO(engine_id, 'is_sorted([])'):
+ return [{'id': 'base_case'}]
+
+ # target predicate seems to always be false
+ if not prolog.engine.ask_truthTO(engine_id, 'is_sorted(_)'):
+ return [{'id': 'predicate_always_false'}]
+
+ # base case works, the recursive doesn't (but it doesn't timeout)
+ # this may be left as the last, most generic hint
+ if not prolog.engine.ask_truth(engine_id, 'is_sorted([-2, 41, 82, 100])'):
+ return [{'id': 'recursive_case'}]
+
+ except socket.timeout as ex:
+ return [{'id': 'timeout'}]
+
+ finally:
+ if engine_id:
+ prolog.engine.destroy(engine_id)
+
return []
diff --git a/prolog/problems/sorting/is_sorted_1/sl.py b/prolog/problems/sorting/is_sorted_1/sl.py
index a1429d3..d4cd999 100644
--- a/prolog/problems/sorting/is_sorted_1/sl.py
+++ b/prolog/problems/sorting/is_sorted_1/sl.py
@@ -1,5 +1,3 @@
-# coding=utf-8
-
name = 'is_sorted/1'
slug = 'Preveri, če so elementi seznama naraščajoče urejeni'
@@ -12,4 +10,61 @@ description = '''\
false.
</pre>'''
-hint = {}
+hint = {
+ 'eq_instead_of_equ': '''\
+<p>Operator <code>==</code> je strožji od operatorja <code>=</code> v smislu, da je za slednjega dovolj,
+da elementa lahko naredi enaka (unifikacija).</p>
+<p>Seveda pa lahko nalogo rešiš brez obeh omenjenih operatorjev, spomni se, da lahko unifikacijo narediš
+implicitno že kar v argumentih predikata (glavi stavka).</p>
+''',
+
+ 'eq_instead_of_equ_markup': '''\
+<p>Morda bi bil bolj primeren operator za unifikacijo (<code>=</code>)?</p>
+''',
+
+ 'base_case': '''\
+<p>Si pomislil na robni pogoj? Kaj je najbolj enostaven primer, ko je element v seznamu?
+Do katerega elementa najlažje prideš?</p>
+''',
+
+ 'recursive_case': '''\
+<p>Robni primer deluje. Kaj pa rekurzivni, splošni, primer?</p>
+''',
+
+ 'predicate_always_false': '''\
+<p>Vse kaže, da tvoj predikat vedno vrne <code>false</code>. Si mu dal pravilno ime, si se morda pri imenu zatipkal?</p>
+<p>Če je ime pravilno, se morda splača preveriti tudi, če se nisi zatipkal kje drugje,
+je morda kakšna pika namesto vejice ali obratno, morda kakšna spremenljivka z malo začetnico?</p>
+<p>Možno je seveda tudi, da so tvoji pogoji prestrogi ali celo nemogoči (kot bi bila npr. zahteva,
+da je <code>X</code> hkrati starš in sestra od <code>Y</code> ali kaj podobno zlobnega).</p>
+''',
+
+ 'timeout': '''\
+<p>Je morda na delu potencialno neskončna rekurzija? Kako se bo ustavila?</p>
+<p>Morda pa je kriv tudi manjkajoč, neustrezen ali preprosto nekompatibilen (s splošnim primerom) robni pogoj?</p>
+''',
+
+ '[]_base_case_missing': '''\
+<p>[]_base_case_missing</p>
+''',
+
+ 'duplicates_fail': '''\
+<p>duplicates_fail</p>
+''',
+
+ 'H1_instead_of_H2_sent_into_recursion': '''\
+<p>H1_instead_of_H2_sent_into_recursion</p>
+''',
+
+ 'base_case_at_len_1_missing': '''\
+<p>base_case_at_len_1_missing</p>
+''',
+
+ 'both_heads_omitted_from_recursion': '''\
+<p>both_heads_omitted_from_recursion</p>
+''',
+
+ 'min_used': '''\
+<p>min_used</p>
+''',
+}