I'm trying to figure out how to get rid of parenthesis in Scheme?
Simply I cannot figure out how to get rid of one stupid parenthesis on this list in scheme.
Here is the list:
(("R" 100 199 (("L" 120 140 160 180))) ("R" 200 299 (("L" 220 240 260 280))))
I know I have to use car and cdr but I feel like I have used every possibility.
scheme racket
asked Nov 9 at 19:39
Albert Leffler
12
add a comment |
Simply I cannot figure out how to get rid of one stupid parenthesis on this list in scheme.
Here is the list:
(("R" 100 199 (("L" 120 140 160 180))) ("R" 200 299 (("L" 220 240 260 280))))
I know I have to use car and cdr but I feel like I have used every possibility.
scheme racket
asked Nov 9 at 19:39
Albert Leffler
12
2
What is the expected output?
– Andy
Nov 9 at 20:07
Which one are you hoping to get rid of? Usually a product of(cons (cons somethng ...))that should have been(cons something ...)instead.
– Sylwester
Nov 10 at 0:54
I’m just trying to get the very first parentheses off so it still says (R 100 199...etc)
– Albert Leffler
Nov 10 at 0:56
add a comment |
Simply I cannot figure out how to get rid of one stupid parenthesis on this list in scheme.
Here is the list:
(("R" 100 199 (("L" 120 140 160 180))) ("R" 200 299 (("L" 220 240 260 280))))
I know I have to use car and cdr but I feel like I have used every possibility.
scheme racket
asked Nov 9 at 19:39
Albert Leffler
12
Simply I cannot figure out how to get rid of one stupid parenthesis on this list in scheme.
Here is the list:
(("R" 100 199 (("L" 120 140 160 180))) ("R" 200 299 (("L" 220 240 260 280))))
I know I have to use car and cdr but I feel like I have used every possibility.
scheme racket
scheme racket
asked Nov 9 at 19:39
Albert Leffler
12
asked Nov 9 at 19:39
Albert Leffler
12
asked Nov 9 at 19:39
Albert Leffler
12
asked Nov 9 at 19:39
Albert Leffler
12
asked Nov 9 at 19:39
Albert Leffler
12
12
2
What is the expected output?
– Andy
Nov 9 at 20:07
Which one are you hoping to get rid of? Usually a product of(cons (cons somethng ...))that should have been(cons something ...)instead.
– Sylwester
Nov 10 at 0:54
I’m just trying to get the very first parentheses off so it still says (R 100 199...etc)
– Albert Leffler
Nov 10 at 0:56
add a comment |
2
What is the expected output?
– Andy
Nov 9 at 20:07
Which one are you hoping to get rid of? Usually a product of(cons (cons somethng ...))that should have been(cons something ...)instead.
– Sylwester
Nov 10 at 0:54
I’m just trying to get the very first parentheses off so it still says (R 100 199...etc)
– Albert Leffler
Nov 10 at 0:56
2
2
What is the expected output?
– Andy
Nov 9 at 20:07
What is the expected output?
– Andy
Nov 9 at 20:07
Which one are you hoping to get rid of? Usually a product of
(cons (cons somethng ...)) that should have been (cons something ...) instead.– Sylwester
Nov 10 at 0:54
Which one are you hoping to get rid of? Usually a product of
(cons (cons somethng ...)) that should have been (cons something ...) instead.– Sylwester
Nov 10 at 0:54
I’m just trying to get the very first parentheses off so it still says (R 100 199...etc)
– Albert Leffler
Nov 10 at 0:56
I’m just trying to get the very first parentheses off so it still says (R 100 199...etc)
– Albert Leffler
Nov 10 at 0:56
add a comment |
1 Answer
1
active
oldest
votes
You cannot get rid of the top-level parenthesis because they are binding two expressions together, as you can see by splitting the expression in different lines:
(
("R" 100 199 (("L" 120 140 160 180)))
("R" 200 299 (("L" 220 240 260 280)))
)
The only parenthesis that may be redundant here are the ones around the "L" expressions.
(
("R" 100 199 ("L" 120 140 160 180))
("R" 200 299 ("L" 220 240 260 280))
)
But these expressions look "unbalanced". As a wild guess, I would think this is what you're looking for (now, using proper Scheme indentation):
(("R" 100 199)
("L" 120 140 160 180)
("R" 200 299)
("L" 220 240 260 280))
But to know for sure, we would have to know what exactly you're trying to do, and what these "L" and "R" mean.
answered Nov 11 at 10:21
Renato
6,58023348
add a comment |
Your Answer
StackExchange.ifUsing("editor", function ()
StackExchange.using("externalEditor", function ()
StackExchange.using("snippets", function ()
StackExchange.snippets.init();
);
);
, "code-snippets");
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "1"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53232275%2fim-trying-to-figure-out-how-to-get-rid-of-parenthesis-in-scheme%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You cannot get rid of the top-level parenthesis because they are binding two expressions together, as you can see by splitting the expression in different lines:
(
("R" 100 199 (("L" 120 140 160 180)))
("R" 200 299 (("L" 220 240 260 280)))
)
The only parenthesis that may be redundant here are the ones around the "L" expressions.
(
("R" 100 199 ("L" 120 140 160 180))
("R" 200 299 ("L" 220 240 260 280))
)
But these expressions look "unbalanced". As a wild guess, I would think this is what you're looking for (now, using proper Scheme indentation):
(("R" 100 199)
("L" 120 140 160 180)
("R" 200 299)
("L" 220 240 260 280))
But to know for sure, we would have to know what exactly you're trying to do, and what these "L" and "R" mean.
answered Nov 11 at 10:21
Renato
6,58023348
add a comment |
You cannot get rid of the top-level parenthesis because they are binding two expressions together, as you can see by splitting the expression in different lines:
(
("R" 100 199 (("L" 120 140 160 180)))
("R" 200 299 (("L" 220 240 260 280)))
)
The only parenthesis that may be redundant here are the ones around the "L" expressions.
(
("R" 100 199 ("L" 120 140 160 180))
("R" 200 299 ("L" 220 240 260 280))
)
But these expressions look "unbalanced". As a wild guess, I would think this is what you're looking for (now, using proper Scheme indentation):
(("R" 100 199)
("L" 120 140 160 180)
("R" 200 299)
("L" 220 240 260 280))
But to know for sure, we would have to know what exactly you're trying to do, and what these "L" and "R" mean.
answered Nov 11 at 10:21
Renato
6,58023348
add a comment |
You cannot get rid of the top-level parenthesis because they are binding two expressions together, as you can see by splitting the expression in different lines:
(
("R" 100 199 (("L" 120 140 160 180)))
("R" 200 299 (("L" 220 240 260 280)))
)
The only parenthesis that may be redundant here are the ones around the "L" expressions.
(
("R" 100 199 ("L" 120 140 160 180))
("R" 200 299 ("L" 220 240 260 280))
)
But these expressions look "unbalanced". As a wild guess, I would think this is what you're looking for (now, using proper Scheme indentation):
(("R" 100 199)
("L" 120 140 160 180)
("R" 200 299)
("L" 220 240 260 280))
But to know for sure, we would have to know what exactly you're trying to do, and what these "L" and "R" mean.
answered Nov 11 at 10:21
Renato
6,58023348
You cannot get rid of the top-level parenthesis because they are binding two expressions together, as you can see by splitting the expression in different lines:
(
("R" 100 199 (("L" 120 140 160 180)))
("R" 200 299 (("L" 220 240 260 280)))
)
The only parenthesis that may be redundant here are the ones around the "L" expressions.
(
("R" 100 199 ("L" 120 140 160 180))
("R" 200 299 ("L" 220 240 260 280))
)
But these expressions look "unbalanced". As a wild guess, I would think this is what you're looking for (now, using proper Scheme indentation):
(("R" 100 199)
("L" 120 140 160 180)
("R" 200 299)
("L" 220 240 260 280))
But to know for sure, we would have to know what exactly you're trying to do, and what these "L" and "R" mean.
answered Nov 11 at 10:21
Renato
6,58023348
answered Nov 11 at 10:21
Renato
6,58023348
answered Nov 11 at 10:21
Renato
6,58023348
answered Nov 11 at 10:21
Renato
6,58023348
6,58023348
add a comment |
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53232275%2fim-trying-to-figure-out-how-to-get-rid-of-parenthesis-in-scheme%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
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
2
What is the expected output?
– Andy
Nov 9 at 20:07
Which one are you hoping to get rid of? Usually a product of
(cons (cons somethng ...))that should have been(cons something ...)instead.– Sylwester
Nov 10 at 0:54
I’m just trying to get the very first parentheses off so it still says (R 100 199...etc)
– Albert Leffler
Nov 10 at 0:56