Logtalk 2.26.2 files.
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1487 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
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169
Logtalk/examples/sicstus/ovals.lgt
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169
Logtalk/examples/sicstus/ovals.lgt
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:- object(math_constants).
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:- info([
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author is 'Paulo Moura',
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version is 1.0,
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date is 2000/4/22,
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comment is 'Implements predicates for retriving common mathematical constants.']).
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:- public(pi/1).
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:- mode(pi(-float), one).
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:- public(e/1).
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:- mode(e(-float), one).
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pi(Pi) :-
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Pi is 4.0*atan(1.0).
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e(E) :-
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E is exp(1.0).
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:- end_object.
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:- object(ellipse(_RX, _RY, _Color),
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imports(proto_hierarchy)).
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:- info([
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author is 'Paulo Moura',
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version is 1.0,
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date is 2000/4/22,
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comment is 'Parametric object for representing geometric ellipses.',
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parnames is ['RX', 'RY', 'Color'],
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source is 'Example adopted from the SICStus Objects documentation.']).
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:- uses(math_constants).
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:- public(color/1).
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:- mode(color(?atom), zero_or_one).
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:- info(color/1, [
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comment is 'Ellipse color.',
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argnames is ['Color']]).
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:- public(rx/1).
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:- mode(rx(?number), zero_or_one).
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:- info(rx/1, [
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comment is 'Ellipse x axis.',
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argnames is ['Rx']]).
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:- public(ry/1).
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:- mode(ry(?number), zero_or_one).
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:- info(ry/1, [
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comment is 'Ellipse y axis.',
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argnames is ['Ry']]).
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:- public(area/1).
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:- mode(area(-number), one).
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:- info(area/1, [
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comment is 'Ellipse area.',
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argnames is ['Area']]).
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:- public(context/0).
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:- mode(context, one).
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:- info(context/0, [
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comment is 'Shows execution context (self, this and sender values).']).
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color(Color) :-
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parameter(3, Color).
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rx(Rx) :-
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parameter(1, Rx).
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ry(Ry) :-
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parameter(2, Ry).
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area(Area) :-
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::rx(Rx),
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::ry(Ry),
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math_constants::pi(Pi),
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Area is Rx*Ry*Pi.
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context :-
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write(ellipse3), nl,
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self(Self), write('self: '), writeq(Self), nl,
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this(This), write('this: '), writeq(This), nl,
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sender(Sender), write('sender: '), writeq(Sender), nl, nl.
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:- end_object.
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:- object(circle(Radius, Color),
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extends(ellipse(Radius, Radius, Color))).
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:- info([
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author is 'Paulo Moura',
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version is 1.0,
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date is 2000/4/22,
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comment is 'Parametric object for representing geometric circles.',
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parnames is ['Radius', 'Color'],
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source is 'Example adopted from the SICStus Objects documentation.']).
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:- public(r/1).
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:- mode(r(?number), zero_or_one).
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:- info(r/1, [
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comment is 'Circle radius.',
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argnames is ['Radius']]).
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r(Radius) :-
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parameter(1, Radius).
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color(Color) :-
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parameter(2, Color).
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rx(Radius) :-
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::r(Radius).
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ry(Radius) :-
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::r(Radius).
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context :-
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write(circle2), nl,
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self(Self), write('self: '), writeq(Self), nl,
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this(This), write('this: '), writeq(This), nl,
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sender(Sender), write('sender: '), writeq(Sender), nl, nl,
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^^context.
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:- end_object.
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:- object(circle1(Color),
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extends(circle(1, Color))).
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:- info([
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author is 'Paulo Moura',
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version is 1.0,
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date is 2000/4/22,
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comment is 'Parametric object for representing geometric circles with radius = 1.',
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parnames is ['Color'],
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source is 'Example adopted from the SICStus Objects documentation.']).
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context :-
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write(circle11), nl,
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self(Self), write('self: '), writeq(Self), nl,
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this(This), write('this: '), writeq(This), nl,
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sender(Sender), write('sender: '), writeq(Sender), nl,
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^^context.
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:- end_object.
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:- object(red_circle(Radius),
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extends(circle(Radius, red))).
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:- info([
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author is 'Paulo Moura',
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version is 1.0,
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date is 2000/4/22,
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comment is 'Parametric object for representing geometric red circles.',
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parnames is ['Radius'],
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source is 'Example adopted from the SICStus Objects documentation.']).
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context :-
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write(red_circle1), nl,
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self(Self), write('self: '), writeq(Self), nl,
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this(This), write('this: '), writeq(This), nl,
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sender(Sender), write('sender: '), writeq(Sender), nl, nl,
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^^context.
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:- end_object.
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68
Logtalk/examples/sicstus/polygons.lgt
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68
Logtalk/examples/sicstus/polygons.lgt
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:- object(rectangle(_Width, _Height)).
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:- info([
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author is 'Paulo Moura',
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version is 1.0,
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date is 2000/4/22,
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comment is 'Parametric object for representing geometric rectangles.',
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parnames is ['Width', 'Height']]).
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:- public(width/1).
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:- mode(width(?number), zero_or_one).
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:- info(width/1, [
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comment is 'Rectangle width.',
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argnames is ['Width']]).
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:- public(height/1).
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:- mode(height(?number), zero_or_one).
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:- info(height/1, [
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comment is 'Rectangle height.',
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argnames is ['Height']]).
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:- public(area/1).
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:- mode(area(-number), one).
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:- info(area/1, [
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comment is 'Rectangle area.',
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argnames is ['Area']]).
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width(Width) :-
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parameter(1, Width).
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height(Height) :-
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parameter(2, Height).
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area(Area) :-
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::width(Width),
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::height(Height),
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Area is Width*Height.
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:- end_object.
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:- object(square(Side),
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extends(rectangle(Side, Side))).
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:- info([
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author is 'Paulo Moura',
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version is 1.0,
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date is 2000/4/22,
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comment is 'Parametric object for representing geometric squares.',
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parnames is ['Side']]).
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:- public(side/1).
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:- mode(side(?number), zero_or_one).
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:- info(side/1, [
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comment is 'Square side.',
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argnames is ['Side']]).
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side(Side) :-
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parameter(1, Side).
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width(Width) :-
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parameter(1, Width).
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height(Height) :-
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parameter(1, Height).
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:- end_object.
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119
Logtalk/examples/sicstus/sorting.lgt
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119
Logtalk/examples/sicstus/sorting.lgt
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:- object(sort(_Type)).
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:- info([
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author is 'Paulo Moura',
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version is 1.0,
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date is 2000/4/22,
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comment is 'List sorting parameterized by the type of the list elements.',
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parnames is ['Type'],
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source is 'Example adopted from the SICStus Objects documentation.']).
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:- uses(list).
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:- calls(comparingp).
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:- public(sort/2).
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:- mode(sort(+list, -list), one).
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:- info(sort/2, [
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comment is 'Sorts a list in ascending order.',
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argnames is ['List', 'Sorted']]).
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:- private(partition/4).
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:- mode(partition(+list, +nonvar, -list, -list), one).
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:- info(partition/4, [
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comment is 'List partition in two sub-lists using a pivot.',
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argnames is ['List', 'Pivot', 'Lowers', 'Biggers']]).
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sort([], []).
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sort([P| L], S) :-
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partition(L, P, Small, Large),
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sort(Small, S0),
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sort(Large, S1),
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list::append(S0, [P| S1], S).
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partition([], _, [], []).
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partition([X| L1], P, Small, Large) :-
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parameter(1, Type),
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( Type::(X < P) ->
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Small = [X| Small1], Large = Large1
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; Small = Small1, Large = [X| Large1]
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),
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partition(L1, P, Small1, Large1).
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:- end_object.
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:- object(rational,
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implements(comparingp)).
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:- info([
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author is 'Paulo Moura',
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version is 1.0,
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date is 2000/4/22,
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comment is 'Implements comparison between rational numbers represented as Num/Den.']).
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N1/D1 < N2/D2 :-
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{N1*D2 < N2*D1}.
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N1/D1 =< N2/D2 :-
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{N1*D2 =< N2*D1}.
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N1/D1 > N2/D2 :-
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{N1*D2 > N2*D1}.
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N1/D1 >= N2/D2 :-
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{N1*D2 >= N2*D1}.
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N1/D1 =:= N2/D2 :-
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{N1*D2 =:= N2*D1}.
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N1/D1 =\= N2/D2 :-
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{N1*D2 =\= N2*D1}.
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:- end_object.
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:- object(colours,
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implements(comparingp)).
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:- info([
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author is 'Paulo Moura',
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version is 1.0,
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date is 2000/4/22,
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comment is 'Implements comparison between visible colors.']).
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Colour1 < Colour2 :-
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order(Colour1, N1),
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order(Colour2, N2),
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{N1 < N2}.
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Colour1 =< Colour2 :-
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order(Colour1, N1),
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order(Colour2, N2),
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{N1 =< N2}.
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Colour1 > Colour2 :-
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order(Colour1, N1),
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order(Colour2, N2),
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{N1 > N2}.
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Colour1 >= Colour2 :-
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order(Colour1, N1),
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order(Colour2, N2),
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{N1 >= N2}.
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Colour1 =:= Colour2 :-
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{Colour1 == Colour2}.
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Colour1 =\= Colour2 :-
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{Colour1 \== Colour2}.
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order(red, 1).
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order(orange, 2).
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order(yellow, 3).
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order(green, 4).
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order(blue, 5).
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order(indigo, 6).
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order(violet, 7).
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:- end_object.
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