Find CISC prerequisites Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern)Fastest way to find all neighbours of a vertex in a graphFind almost-shortest path more efficientlyFind all paths from source to destinationFind unconnected nodes of a graphFind order to install dependenciesNeo4j traversal algorithm to find dense nodesFind the most-connected nodes in a graphAlgorithm to find connected tiles (percolation)Given origin, destination objects, find all the paths from a place to anotherFind the longest connect cells region per color
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Find CISC prerequisites
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern)Fastest way to find all neighbours of a vertex in a graphFind almost-shortest path more efficientlyFind all paths from source to destinationFind unconnected nodes of a graphFind order to install dependenciesNeo4j traversal algorithm to find dense nodesFind the most-connected nodes in a graphAlgorithm to find connected tiles (percolation)Given origin, destination objects, find all the paths from a place to anotherFind the longest connect cells region per color
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
$begingroup$
Below I have some code written in prolog as a brief example. The goal of the program is to take a Computer and Information Science (CISC) course number and return any CISC prerequisites (prereqs).
I would like to know if this code followed common practices in prolog.
%CISC Courses
cisc(100).
cisc(101).
cisc(103).
cisc(106).
cisc(120).
cisc(160).
cisc(201).
cisc(211).
cisc(225).
cisc(233).
cisc(298).
cisc(300).
cisc(301).
cisc(311).
cisc(320).
cisc(330).
cisc(333).
cisc(340).
cisc(349).
cisc(365).
cisc(370).
cisc(380).
cisc(390).
cisc(397).
cisc(399).
cisc(400).
cisc(431).
cisc(432).
cisc(433).
cisc(440).
cisc(444).
cisc(460).
cisc(491).
cisc(498).
cisc(499).
Define Prereqs
prereqs(160,120).
prereqs(211,120).
prereqs(225,120).
prereqs(300,120).
prereqs(233,160).
prereqs(301,211).
prereqs(301,233).
prereqs(311,160).
prereqs(311,225).
prereqs(320,211).
prereqs(320,233).
prereqs(330,211).
prereqs(333,233).
prereqs(340,233).
prereqs(349,233).
prereqs(370,333).
prereqs(390,120).
prereqs(397,225).
prereqs(397,301).
prereqs(399,233).
prereqs(400,233).
prereqs(400,301).
prereqs(431,233).
prereqs(431,399).
prereqs(432,233).
prereqs(433,301).
prereqs(433,399).
prereqs(440,370).
prereqs(444,433).
prereqs(460,225).
prereqs(460,233).
prereqs(491,225).
prereqs(491,301).
prereqs(498,298).
%Return prereqs to a given class with prereqs of prereqs
prereq(X,Y) :- prereqs(X,Y),format("CISC ~w is a prereq of CISC ~w~n",[Y,X]).
prereq(X,Y) :- prereqs(X,Z),
prereq(Z, Y).
graph prolog
edited Nov 19 '18 at 20:18
200_success
131k17157422
asked Nov 16 '18 at 5:24
DanSchneiderNADanSchneiderNA
23729
$endgroup$
bumped to the homepage by Community♦ 9 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
$begingroup$
Below I have some code written in prolog as a brief example. The goal of the program is to take a Computer and Information Science (CISC) course number and return any CISC prerequisites (prereqs).
I would like to know if this code followed common practices in prolog.
%CISC Courses
cisc(100).
cisc(101).
cisc(103).
cisc(106).
cisc(120).
cisc(160).
cisc(201).
cisc(211).
cisc(225).
cisc(233).
cisc(298).
cisc(300).
cisc(301).
cisc(311).
cisc(320).
cisc(330).
cisc(333).
cisc(340).
cisc(349).
cisc(365).
cisc(370).
cisc(380).
cisc(390).
cisc(397).
cisc(399).
cisc(400).
cisc(431).
cisc(432).
cisc(433).
cisc(440).
cisc(444).
cisc(460).
cisc(491).
cisc(498).
cisc(499).
Define Prereqs
prereqs(160,120).
prereqs(211,120).
prereqs(225,120).
prereqs(300,120).
prereqs(233,160).
prereqs(301,211).
prereqs(301,233).
prereqs(311,160).
prereqs(311,225).
prereqs(320,211).
prereqs(320,233).
prereqs(330,211).
prereqs(333,233).
prereqs(340,233).
prereqs(349,233).
prereqs(370,333).
prereqs(390,120).
prereqs(397,225).
prereqs(397,301).
prereqs(399,233).
prereqs(400,233).
prereqs(400,301).
prereqs(431,233).
prereqs(431,399).
prereqs(432,233).
prereqs(433,301).
prereqs(433,399).
prereqs(440,370).
prereqs(444,433).
prereqs(460,225).
prereqs(460,233).
prereqs(491,225).
prereqs(491,301).
prereqs(498,298).
%Return prereqs to a given class with prereqs of prereqs
prereq(X,Y) :- prereqs(X,Y),format("CISC ~w is a prereq of CISC ~w~n",[Y,X]).
prereq(X,Y) :- prereqs(X,Z),
prereq(Z, Y).
graph prolog
edited Nov 19 '18 at 20:18
200_success
131k17157422
asked Nov 16 '18 at 5:24
DanSchneiderNADanSchneiderNA
23729
$endgroup$
bumped to the homepage by Community♦ 9 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
$begingroup$
Looks like you need loops to setup.
$endgroup$
– πάντα ῥεῖ
Nov 16 '18 at 5:30
$begingroup$
There is a recursive call at the end. It's hard to tell because of the naming structure i've used.
$endgroup$
– DanSchneiderNA
Nov 16 '18 at 5:45
add a comment |
$begingroup$
Below I have some code written in prolog as a brief example. The goal of the program is to take a Computer and Information Science (CISC) course number and return any CISC prerequisites (prereqs).
I would like to know if this code followed common practices in prolog.
%CISC Courses
cisc(100).
cisc(101).
cisc(103).
cisc(106).
cisc(120).
cisc(160).
cisc(201).
cisc(211).
cisc(225).
cisc(233).
cisc(298).
cisc(300).
cisc(301).
cisc(311).
cisc(320).
cisc(330).
cisc(333).
cisc(340).
cisc(349).
cisc(365).
cisc(370).
cisc(380).
cisc(390).
cisc(397).
cisc(399).
cisc(400).
cisc(431).
cisc(432).
cisc(433).
cisc(440).
cisc(444).
cisc(460).
cisc(491).
cisc(498).
cisc(499).
Define Prereqs
prereqs(160,120).
prereqs(211,120).
prereqs(225,120).
prereqs(300,120).
prereqs(233,160).
prereqs(301,211).
prereqs(301,233).
prereqs(311,160).
prereqs(311,225).
prereqs(320,211).
prereqs(320,233).
prereqs(330,211).
prereqs(333,233).
prereqs(340,233).
prereqs(349,233).
prereqs(370,333).
prereqs(390,120).
prereqs(397,225).
prereqs(397,301).
prereqs(399,233).
prereqs(400,233).
prereqs(400,301).
prereqs(431,233).
prereqs(431,399).
prereqs(432,233).
prereqs(433,301).
prereqs(433,399).
prereqs(440,370).
prereqs(444,433).
prereqs(460,225).
prereqs(460,233).
prereqs(491,225).
prereqs(491,301).
prereqs(498,298).
%Return prereqs to a given class with prereqs of prereqs
prereq(X,Y) :- prereqs(X,Y),format("CISC ~w is a prereq of CISC ~w~n",[Y,X]).
prereq(X,Y) :- prereqs(X,Z),
prereq(Z, Y).
graph prolog
edited Nov 19 '18 at 20:18
200_success
131k17157422
asked Nov 16 '18 at 5:24
DanSchneiderNADanSchneiderNA
23729
$endgroup$
Below I have some code written in prolog as a brief example. The goal of the program is to take a Computer and Information Science (CISC) course number and return any CISC prerequisites (prereqs).
I would like to know if this code followed common practices in prolog.
%CISC Courses
cisc(100).
cisc(101).
cisc(103).
cisc(106).
cisc(120).
cisc(160).
cisc(201).
cisc(211).
cisc(225).
cisc(233).
cisc(298).
cisc(300).
cisc(301).
cisc(311).
cisc(320).
cisc(330).
cisc(333).
cisc(340).
cisc(349).
cisc(365).
cisc(370).
cisc(380).
cisc(390).
cisc(397).
cisc(399).
cisc(400).
cisc(431).
cisc(432).
cisc(433).
cisc(440).
cisc(444).
cisc(460).
cisc(491).
cisc(498).
cisc(499).
Define Prereqs
prereqs(160,120).
prereqs(211,120).
prereqs(225,120).
prereqs(300,120).
prereqs(233,160).
prereqs(301,211).
prereqs(301,233).
prereqs(311,160).
prereqs(311,225).
prereqs(320,211).
prereqs(320,233).
prereqs(330,211).
prereqs(333,233).
prereqs(340,233).
prereqs(349,233).
prereqs(370,333).
prereqs(390,120).
prereqs(397,225).
prereqs(397,301).
prereqs(399,233).
prereqs(400,233).
prereqs(400,301).
prereqs(431,233).
prereqs(431,399).
prereqs(432,233).
prereqs(433,301).
prereqs(433,399).
prereqs(440,370).
prereqs(444,433).
prereqs(460,225).
prereqs(460,233).
prereqs(491,225).
prereqs(491,301).
prereqs(498,298).
%Return prereqs to a given class with prereqs of prereqs
prereq(X,Y) :- prereqs(X,Y),format("CISC ~w is a prereq of CISC ~w~n",[Y,X]).
prereq(X,Y) :- prereqs(X,Z),
prereq(Z, Y).
graph prolog
graph prolog
edited Nov 19 '18 at 20:18
200_success
131k17157422
asked Nov 16 '18 at 5:24
DanSchneiderNADanSchneiderNA
23729
edited Nov 19 '18 at 20:18
200_success
131k17157422
asked Nov 16 '18 at 5:24
DanSchneiderNADanSchneiderNA
23729
edited Nov 19 '18 at 20:18
200_success
131k17157422
edited Nov 19 '18 at 20:18
200_success
131k17157422
edited Nov 19 '18 at 20:18
200_success
131k17157422
131k17157422
asked Nov 16 '18 at 5:24
DanSchneiderNADanSchneiderNA
23729
asked Nov 16 '18 at 5:24
DanSchneiderNADanSchneiderNA
23729
asked Nov 16 '18 at 5:24
DanSchneiderNADanSchneiderNA
23729
23729
bumped to the homepage by Community♦ 9 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
bumped to the homepage by Community♦ 9 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
$begingroup$
Looks like you need loops to setup.
$endgroup$
– πάντα ῥεῖ
Nov 16 '18 at 5:30
$begingroup$
There is a recursive call at the end. It's hard to tell because of the naming structure i've used.
$endgroup$
– DanSchneiderNA
Nov 16 '18 at 5:45
add a comment |
$begingroup$
Looks like you need loops to setup.
$endgroup$
– πάντα ῥεῖ
Nov 16 '18 at 5:30
$begingroup$
There is a recursive call at the end. It's hard to tell because of the naming structure i've used.
$endgroup$
– DanSchneiderNA
Nov 16 '18 at 5:45
$begingroup$
Looks like you need loops to setup.
$endgroup$
– πάντα ῥεῖ
Nov 16 '18 at 5:30
$begingroup$
Looks like you need loops to setup.
$endgroup$
– πάντα ῥεῖ
Nov 16 '18 at 5:30
$begingroup$
There is a recursive call at the end. It's hard to tell because of the naming structure i've used.
$endgroup$
– DanSchneiderNA
Nov 16 '18 at 5:45
$begingroup$
There is a recursive call at the end. It's hard to tell because of the naming structure i've used.
$endgroup$
– DanSchneiderNA
Nov 16 '18 at 5:45
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
In my opinion, your code would benefit considerably from a better naming convention.
In Prolog, a good predicate name makes clear what each argument denotes.
For example, when I see:
prereqs(460, 233).
then I have no idea what the arguments are. I see it is about prerequisites, but in which direction? Is 460 a prerequisite of 233, or is it the other way around? Also, why is this called "prereqs" although each clause only denotes a single prerequisite?
A much more descriptive name for this predicate would be (for example!):
prerequisite_of_course(460, 230).
because this makes clear what is the prerequisite of what. Another very good, descriptive name would be for example:
course_prerequisite(230, 460).
You will find that, if you use more descriptive names, then emitting output yourself will become unnecessary: The predicate name alone will make the situation perfectly clear. Let the toplevel do the printing for you!
The variable names in:
prereq(X, Y) :-
prereqs(X, Z),
prereq(Z, Y).
could also be improved considerably by choosing more descriptive names or abbreviations, such as Req, Course etc. For transitive relations between courses, you can for example use:
Course0 → Course1 → ... → Course
answered Nov 19 '18 at 19:59
matmat
65137
$endgroup$
add a comment |
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1 Answer
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active
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
In my opinion, your code would benefit considerably from a better naming convention.
In Prolog, a good predicate name makes clear what each argument denotes.
For example, when I see:
prereqs(460, 233).
then I have no idea what the arguments are. I see it is about prerequisites, but in which direction? Is 460 a prerequisite of 233, or is it the other way around? Also, why is this called "prereqs" although each clause only denotes a single prerequisite?
A much more descriptive name for this predicate would be (for example!):
prerequisite_of_course(460, 230).
because this makes clear what is the prerequisite of what. Another very good, descriptive name would be for example:
course_prerequisite(230, 460).
You will find that, if you use more descriptive names, then emitting output yourself will become unnecessary: The predicate name alone will make the situation perfectly clear. Let the toplevel do the printing for you!
The variable names in:
prereq(X, Y) :-
prereqs(X, Z),
prereq(Z, Y).
could also be improved considerably by choosing more descriptive names or abbreviations, such as Req, Course etc. For transitive relations between courses, you can for example use:
Course0 → Course1 → ... → Course
answered Nov 19 '18 at 19:59
matmat
65137
$endgroup$
add a comment |
$begingroup$
In my opinion, your code would benefit considerably from a better naming convention.
In Prolog, a good predicate name makes clear what each argument denotes.
For example, when I see:
prereqs(460, 233).
then I have no idea what the arguments are. I see it is about prerequisites, but in which direction? Is 460 a prerequisite of 233, or is it the other way around? Also, why is this called "prereqs" although each clause only denotes a single prerequisite?
A much more descriptive name for this predicate would be (for example!):
prerequisite_of_course(460, 230).
because this makes clear what is the prerequisite of what. Another very good, descriptive name would be for example:
course_prerequisite(230, 460).
You will find that, if you use more descriptive names, then emitting output yourself will become unnecessary: The predicate name alone will make the situation perfectly clear. Let the toplevel do the printing for you!
The variable names in:
prereq(X, Y) :-
prereqs(X, Z),
prereq(Z, Y).
could also be improved considerably by choosing more descriptive names or abbreviations, such as Req, Course etc. For transitive relations between courses, you can for example use:
Course0 → Course1 → ... → Course
answered Nov 19 '18 at 19:59
matmat
65137
$endgroup$
add a comment |
$begingroup$
In my opinion, your code would benefit considerably from a better naming convention.
In Prolog, a good predicate name makes clear what each argument denotes.
For example, when I see:
prereqs(460, 233).
then I have no idea what the arguments are. I see it is about prerequisites, but in which direction? Is 460 a prerequisite of 233, or is it the other way around? Also, why is this called "prereqs" although each clause only denotes a single prerequisite?
A much more descriptive name for this predicate would be (for example!):
prerequisite_of_course(460, 230).
because this makes clear what is the prerequisite of what. Another very good, descriptive name would be for example:
course_prerequisite(230, 460).
You will find that, if you use more descriptive names, then emitting output yourself will become unnecessary: The predicate name alone will make the situation perfectly clear. Let the toplevel do the printing for you!
The variable names in:
prereq(X, Y) :-
prereqs(X, Z),
prereq(Z, Y).
could also be improved considerably by choosing more descriptive names or abbreviations, such as Req, Course etc. For transitive relations between courses, you can for example use:
Course0 → Course1 → ... → Course
answered Nov 19 '18 at 19:59
matmat
65137
$endgroup$
In my opinion, your code would benefit considerably from a better naming convention.
In Prolog, a good predicate name makes clear what each argument denotes.
For example, when I see:
prereqs(460, 233).
then I have no idea what the arguments are. I see it is about prerequisites, but in which direction? Is 460 a prerequisite of 233, or is it the other way around? Also, why is this called "prereqs" although each clause only denotes a single prerequisite?
A much more descriptive name for this predicate would be (for example!):
prerequisite_of_course(460, 230).
because this makes clear what is the prerequisite of what. Another very good, descriptive name would be for example:
course_prerequisite(230, 460).
You will find that, if you use more descriptive names, then emitting output yourself will become unnecessary: The predicate name alone will make the situation perfectly clear. Let the toplevel do the printing for you!
The variable names in:
prereq(X, Y) :-
prereqs(X, Z),
prereq(Z, Y).
could also be improved considerably by choosing more descriptive names or abbreviations, such as Req, Course etc. For transitive relations between courses, you can for example use:
Course0 → Course1 → ... → Course
answered Nov 19 '18 at 19:59
matmat
65137
answered Nov 19 '18 at 19:59
matmat
65137
answered Nov 19 '18 at 19:59
matmat
65137
answered Nov 19 '18 at 19:59
matmat
65137
65137
add a comment |
add a comment |
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var $elem = $('.new-login-left'),
docViewTop = $window.scrollTop(),
docViewBottom = docViewTop + $window.height(),
elemTop = $elem.offset().top,
elemBottom = elemTop + $elem.height();
if ((docViewTop elemBottom))
StackExchange.using('gps', function() StackExchange.gps.track('embedded_signup_form.view', location: 'question_page' ); );
$window.unbind('scroll', onScroll);
;
$window.on('scroll', onScroll);
);
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StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
var $window = $(window),
onScroll = function(e)
var $elem = $('.new-login-left'),
docViewTop = $window.scrollTop(),
docViewBottom = docViewTop + $window.height(),
elemTop = $elem.offset().top,
elemBottom = elemTop + $elem.height();
if ((docViewTop elemBottom))
StackExchange.using('gps', function() StackExchange.gps.track('embedded_signup_form.view', location: 'question_page' ); );
$window.unbind('scroll', onScroll);
;
$window.on('scroll', onScroll);
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
lYGMWBPBrftLRrRlDzma74y3ouu2A
$begingroup$
Looks like you need loops to setup.
$endgroup$
– πάντα ῥεῖ
Nov 16 '18 at 5:30
$begingroup$
There is a recursive call at the end. It's hard to tell because of the naming structure i've used.
$endgroup$
– DanSchneiderNA
Nov 16 '18 at 5:45