Is it a Cyclops number? “Nobody” knows!
$begingroup$
Task:
Given an integer input, figure out whether or not it is a Cyclops Number.
What is a Cyclops number, you may ask? Well, it's a number whose binary representation only has one 0
in the center!
Test Cases:
Input | Output
--------------
1 | falsy
5 | truthy
12 | falsy
27 | truthy
85 | falsy
101 | falsy
119 | truthy
Input: An integer or equivalent types. (int
, long
, decimal
, etc.)
Output:
- Truthy or falsy (e.g.
true
orfalse
,0
or1
)..
Challenge Rules:
Input that is less than 0 is assumed to be falsy.
If the length of the binary representation of the number is even, then the number cannot be a Cyclops number.
General Rules:
This is code-golf, so the shortest answers in bytes wins!.
Default loopholes are forbidden.
Standard rules apply for your answer with default I/O rules.
This is my first Programming Puzzles & Code Golf challenge, so any feedback on how I should improve would be much appreciated!
code-golf number decision-problem binary
New contributor
$endgroup$
|
show 3 more comments
$begingroup$
Task:
Given an integer input, figure out whether or not it is a Cyclops Number.
What is a Cyclops number, you may ask? Well, it's a number whose binary representation only has one 0
in the center!
Test Cases:
Input | Output
--------------
1 | falsy
5 | truthy
12 | falsy
27 | truthy
85 | falsy
101 | falsy
119 | truthy
Input: An integer or equivalent types. (int
, long
, decimal
, etc.)
Output:
- Truthy or falsy (e.g.
true
orfalse
,0
or1
)..
Challenge Rules:
Input that is less than 0 is assumed to be falsy.
If the length of the binary representation of the number is even, then the number cannot be a Cyclops number.
General Rules:
This is code-golf, so the shortest answers in bytes wins!.
Default loopholes are forbidden.
Standard rules apply for your answer with default I/O rules.
This is my first Programming Puzzles & Code Golf challenge, so any feedback on how I should improve would be much appreciated!
code-golf number decision-problem binary
New contributor
$endgroup$
1
$begingroup$
You've essentially made two separate challenges, one a decision problem and one about outputting the next number of a sequence. This will not do what you want, which is invite more answers, but instead put off users who now need to consider three options about what to program before posting. I'd recommend removing the option, and in the future you can try posting to our sandbox first where hopefully you will get helpful feedback before posting. Good luck!
$endgroup$
– FryAmTheEggman
1 hour ago
$begingroup$
@SriotchilismO'Zaic thanks for the feedback! I have edited the post.
$endgroup$
– Tau
1 hour ago
1
$begingroup$
I'd also recommend removing the hard coding restriction. By default solutions would need to handle all cyclops numbers in theory, and there are clearly infinitely many of them, so they couldn't all be hardcoded.
$endgroup$
– FryAmTheEggman
1 hour ago
1
$begingroup$
Note: This is A129868
$endgroup$
– tsh
1 hour ago
2
$begingroup$
Should119
be true?
$endgroup$
– Quintec
1 hour ago
|
show 3 more comments
$begingroup$
Task:
Given an integer input, figure out whether or not it is a Cyclops Number.
What is a Cyclops number, you may ask? Well, it's a number whose binary representation only has one 0
in the center!
Test Cases:
Input | Output
--------------
1 | falsy
5 | truthy
12 | falsy
27 | truthy
85 | falsy
101 | falsy
119 | truthy
Input: An integer or equivalent types. (int
, long
, decimal
, etc.)
Output:
- Truthy or falsy (e.g.
true
orfalse
,0
or1
)..
Challenge Rules:
Input that is less than 0 is assumed to be falsy.
If the length of the binary representation of the number is even, then the number cannot be a Cyclops number.
General Rules:
This is code-golf, so the shortest answers in bytes wins!.
Default loopholes are forbidden.
Standard rules apply for your answer with default I/O rules.
This is my first Programming Puzzles & Code Golf challenge, so any feedback on how I should improve would be much appreciated!
code-golf number decision-problem binary
New contributor
$endgroup$
Task:
Given an integer input, figure out whether or not it is a Cyclops Number.
What is a Cyclops number, you may ask? Well, it's a number whose binary representation only has one 0
in the center!
Test Cases:
Input | Output
--------------
1 | falsy
5 | truthy
12 | falsy
27 | truthy
85 | falsy
101 | falsy
119 | truthy
Input: An integer or equivalent types. (int
, long
, decimal
, etc.)
Output:
- Truthy or falsy (e.g.
true
orfalse
,0
or1
)..
Challenge Rules:
Input that is less than 0 is assumed to be falsy.
If the length of the binary representation of the number is even, then the number cannot be a Cyclops number.
General Rules:
This is code-golf, so the shortest answers in bytes wins!.
Default loopholes are forbidden.
Standard rules apply for your answer with default I/O rules.
This is my first Programming Puzzles & Code Golf challenge, so any feedback on how I should improve would be much appreciated!
code-golf number decision-problem binary
code-golf number decision-problem binary
New contributor
New contributor
edited 1 hour ago
Tau
New contributor
asked 2 hours ago
TauTau
1165
1165
New contributor
New contributor
1
$begingroup$
You've essentially made two separate challenges, one a decision problem and one about outputting the next number of a sequence. This will not do what you want, which is invite more answers, but instead put off users who now need to consider three options about what to program before posting. I'd recommend removing the option, and in the future you can try posting to our sandbox first where hopefully you will get helpful feedback before posting. Good luck!
$endgroup$
– FryAmTheEggman
1 hour ago
$begingroup$
@SriotchilismO'Zaic thanks for the feedback! I have edited the post.
$endgroup$
– Tau
1 hour ago
1
$begingroup$
I'd also recommend removing the hard coding restriction. By default solutions would need to handle all cyclops numbers in theory, and there are clearly infinitely many of them, so they couldn't all be hardcoded.
$endgroup$
– FryAmTheEggman
1 hour ago
1
$begingroup$
Note: This is A129868
$endgroup$
– tsh
1 hour ago
2
$begingroup$
Should119
be true?
$endgroup$
– Quintec
1 hour ago
|
show 3 more comments
1
$begingroup$
You've essentially made two separate challenges, one a decision problem and one about outputting the next number of a sequence. This will not do what you want, which is invite more answers, but instead put off users who now need to consider three options about what to program before posting. I'd recommend removing the option, and in the future you can try posting to our sandbox first where hopefully you will get helpful feedback before posting. Good luck!
$endgroup$
– FryAmTheEggman
1 hour ago
$begingroup$
@SriotchilismO'Zaic thanks for the feedback! I have edited the post.
$endgroup$
– Tau
1 hour ago
1
$begingroup$
I'd also recommend removing the hard coding restriction. By default solutions would need to handle all cyclops numbers in theory, and there are clearly infinitely many of them, so they couldn't all be hardcoded.
$endgroup$
– FryAmTheEggman
1 hour ago
1
$begingroup$
Note: This is A129868
$endgroup$
– tsh
1 hour ago
2
$begingroup$
Should119
be true?
$endgroup$
– Quintec
1 hour ago
1
1
$begingroup$
You've essentially made two separate challenges, one a decision problem and one about outputting the next number of a sequence. This will not do what you want, which is invite more answers, but instead put off users who now need to consider three options about what to program before posting. I'd recommend removing the option, and in the future you can try posting to our sandbox first where hopefully you will get helpful feedback before posting. Good luck!
$endgroup$
– FryAmTheEggman
1 hour ago
$begingroup$
You've essentially made two separate challenges, one a decision problem and one about outputting the next number of a sequence. This will not do what you want, which is invite more answers, but instead put off users who now need to consider three options about what to program before posting. I'd recommend removing the option, and in the future you can try posting to our sandbox first where hopefully you will get helpful feedback before posting. Good luck!
$endgroup$
– FryAmTheEggman
1 hour ago
$begingroup$
@SriotchilismO'Zaic thanks for the feedback! I have edited the post.
$endgroup$
– Tau
1 hour ago
$begingroup$
@SriotchilismO'Zaic thanks for the feedback! I have edited the post.
$endgroup$
– Tau
1 hour ago
1
1
$begingroup$
I'd also recommend removing the hard coding restriction. By default solutions would need to handle all cyclops numbers in theory, and there are clearly infinitely many of them, so they couldn't all be hardcoded.
$endgroup$
– FryAmTheEggman
1 hour ago
$begingroup$
I'd also recommend removing the hard coding restriction. By default solutions would need to handle all cyclops numbers in theory, and there are clearly infinitely many of them, so they couldn't all be hardcoded.
$endgroup$
– FryAmTheEggman
1 hour ago
1
1
$begingroup$
Note: This is A129868
$endgroup$
– tsh
1 hour ago
$begingroup$
Note: This is A129868
$endgroup$
– tsh
1 hour ago
2
2
$begingroup$
Should
119
be true?$endgroup$
– Quintec
1 hour ago
$begingroup$
Should
119
be true?$endgroup$
– Quintec
1 hour ago
|
show 3 more comments
4 Answers
4
active
oldest
votes
$begingroup$
Japt, 25 19 10 bytes
¢èT ¶1©¢ês
That's more like it...
Checks if there is only one 0 in the binary representation and that the binary representation is a palindrome.
Try it online!
$endgroup$
$begingroup$
found an even shorter way, based on your solution :)
$endgroup$
– Embodiment of Ignorance
54 mins ago
add a comment |
$begingroup$
Japt, 8 bytes
¤øT ©¢ês
Based off of Quintec's solution.
Try it Online!
Old regex-based solution, 15 bytes
¤f/^(1*)01$/ l
Returns 1 for true, 0 for false.
Try it Online!
$endgroup$
$begingroup$
Well played, I should really learn regular expressions sometime. :) +1
$endgroup$
– Quintec
1 hour ago
$begingroup$
@Quintec Regex is awesome :)
$endgroup$
– Embodiment of Ignorance
1 hour ago
$begingroup$
Update: found shorter way :)
$endgroup$
– Quintec
1 hour ago
add a comment |
$begingroup$
Perl 6, 23 bytes
{.base(2)~~/^(1*)0$0$/}
Try it online!
Regex based solution
$endgroup$
add a comment |
$begingroup$
JavaScript (Node.js), 32 bytes
f=(p,q)=>p&1?f(p/2,q+q|2):!(p^q)
Try it online!
31 bytes version
f=(p,q)=>p&1?f(p>>1,q+q|2):p==q
This one will report falsy for 0.
JavaScript (Node.js), 35 bytes
p=>p.toString(2).match(/^(1*)01$/)
Try it online!
$endgroup$
add a comment |
Your Answer
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4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
Japt, 25 19 10 bytes
¢èT ¶1©¢ês
That's more like it...
Checks if there is only one 0 in the binary representation and that the binary representation is a palindrome.
Try it online!
$endgroup$
$begingroup$
found an even shorter way, based on your solution :)
$endgroup$
– Embodiment of Ignorance
54 mins ago
add a comment |
$begingroup$
Japt, 25 19 10 bytes
¢èT ¶1©¢ês
That's more like it...
Checks if there is only one 0 in the binary representation and that the binary representation is a palindrome.
Try it online!
$endgroup$
$begingroup$
found an even shorter way, based on your solution :)
$endgroup$
– Embodiment of Ignorance
54 mins ago
add a comment |
$begingroup$
Japt, 25 19 10 bytes
¢èT ¶1©¢ês
That's more like it...
Checks if there is only one 0 in the binary representation and that the binary representation is a palindrome.
Try it online!
$endgroup$
Japt, 25 19 10 bytes
¢èT ¶1©¢ês
That's more like it...
Checks if there is only one 0 in the binary representation and that the binary representation is a palindrome.
Try it online!
edited 1 hour ago
answered 1 hour ago
QuintecQuintec
1,9781726
1,9781726
$begingroup$
found an even shorter way, based on your solution :)
$endgroup$
– Embodiment of Ignorance
54 mins ago
add a comment |
$begingroup$
found an even shorter way, based on your solution :)
$endgroup$
– Embodiment of Ignorance
54 mins ago
$begingroup$
found an even shorter way, based on your solution :)
$endgroup$
– Embodiment of Ignorance
54 mins ago
$begingroup$
found an even shorter way, based on your solution :)
$endgroup$
– Embodiment of Ignorance
54 mins ago
add a comment |
$begingroup$
Japt, 8 bytes
¤øT ©¢ês
Based off of Quintec's solution.
Try it Online!
Old regex-based solution, 15 bytes
¤f/^(1*)01$/ l
Returns 1 for true, 0 for false.
Try it Online!
$endgroup$
$begingroup$
Well played, I should really learn regular expressions sometime. :) +1
$endgroup$
– Quintec
1 hour ago
$begingroup$
@Quintec Regex is awesome :)
$endgroup$
– Embodiment of Ignorance
1 hour ago
$begingroup$
Update: found shorter way :)
$endgroup$
– Quintec
1 hour ago
add a comment |
$begingroup$
Japt, 8 bytes
¤øT ©¢ês
Based off of Quintec's solution.
Try it Online!
Old regex-based solution, 15 bytes
¤f/^(1*)01$/ l
Returns 1 for true, 0 for false.
Try it Online!
$endgroup$
$begingroup$
Well played, I should really learn regular expressions sometime. :) +1
$endgroup$
– Quintec
1 hour ago
$begingroup$
@Quintec Regex is awesome :)
$endgroup$
– Embodiment of Ignorance
1 hour ago
$begingroup$
Update: found shorter way :)
$endgroup$
– Quintec
1 hour ago
add a comment |
$begingroup$
Japt, 8 bytes
¤øT ©¢ês
Based off of Quintec's solution.
Try it Online!
Old regex-based solution, 15 bytes
¤f/^(1*)01$/ l
Returns 1 for true, 0 for false.
Try it Online!
$endgroup$
Japt, 8 bytes
¤øT ©¢ês
Based off of Quintec's solution.
Try it Online!
Old regex-based solution, 15 bytes
¤f/^(1*)01$/ l
Returns 1 for true, 0 for false.
Try it Online!
edited 55 mins ago
answered 1 hour ago
Embodiment of IgnoranceEmbodiment of Ignorance
1,516123
1,516123
$begingroup$
Well played, I should really learn regular expressions sometime. :) +1
$endgroup$
– Quintec
1 hour ago
$begingroup$
@Quintec Regex is awesome :)
$endgroup$
– Embodiment of Ignorance
1 hour ago
$begingroup$
Update: found shorter way :)
$endgroup$
– Quintec
1 hour ago
add a comment |
$begingroup$
Well played, I should really learn regular expressions sometime. :) +1
$endgroup$
– Quintec
1 hour ago
$begingroup$
@Quintec Regex is awesome :)
$endgroup$
– Embodiment of Ignorance
1 hour ago
$begingroup$
Update: found shorter way :)
$endgroup$
– Quintec
1 hour ago
$begingroup$
Well played, I should really learn regular expressions sometime. :) +1
$endgroup$
– Quintec
1 hour ago
$begingroup$
Well played, I should really learn regular expressions sometime. :) +1
$endgroup$
– Quintec
1 hour ago
$begingroup$
@Quintec Regex is awesome :)
$endgroup$
– Embodiment of Ignorance
1 hour ago
$begingroup$
@Quintec Regex is awesome :)
$endgroup$
– Embodiment of Ignorance
1 hour ago
$begingroup$
Update: found shorter way :)
$endgroup$
– Quintec
1 hour ago
$begingroup$
Update: found shorter way :)
$endgroup$
– Quintec
1 hour ago
add a comment |
$begingroup$
Perl 6, 23 bytes
{.base(2)~~/^(1*)0$0$/}
Try it online!
Regex based solution
$endgroup$
add a comment |
$begingroup$
Perl 6, 23 bytes
{.base(2)~~/^(1*)0$0$/}
Try it online!
Regex based solution
$endgroup$
add a comment |
$begingroup$
Perl 6, 23 bytes
{.base(2)~~/^(1*)0$0$/}
Try it online!
Regex based solution
$endgroup$
Perl 6, 23 bytes
{.base(2)~~/^(1*)0$0$/}
Try it online!
Regex based solution
answered 1 hour ago
Jo KingJo King
24.4k357126
24.4k357126
add a comment |
add a comment |
$begingroup$
JavaScript (Node.js), 32 bytes
f=(p,q)=>p&1?f(p/2,q+q|2):!(p^q)
Try it online!
31 bytes version
f=(p,q)=>p&1?f(p>>1,q+q|2):p==q
This one will report falsy for 0.
JavaScript (Node.js), 35 bytes
p=>p.toString(2).match(/^(1*)01$/)
Try it online!
$endgroup$
add a comment |
$begingroup$
JavaScript (Node.js), 32 bytes
f=(p,q)=>p&1?f(p/2,q+q|2):!(p^q)
Try it online!
31 bytes version
f=(p,q)=>p&1?f(p>>1,q+q|2):p==q
This one will report falsy for 0.
JavaScript (Node.js), 35 bytes
p=>p.toString(2).match(/^(1*)01$/)
Try it online!
$endgroup$
add a comment |
$begingroup$
JavaScript (Node.js), 32 bytes
f=(p,q)=>p&1?f(p/2,q+q|2):!(p^q)
Try it online!
31 bytes version
f=(p,q)=>p&1?f(p>>1,q+q|2):p==q
This one will report falsy for 0.
JavaScript (Node.js), 35 bytes
p=>p.toString(2).match(/^(1*)01$/)
Try it online!
$endgroup$
JavaScript (Node.js), 32 bytes
f=(p,q)=>p&1?f(p/2,q+q|2):!(p^q)
Try it online!
31 bytes version
f=(p,q)=>p&1?f(p>>1,q+q|2):p==q
This one will report falsy for 0.
JavaScript (Node.js), 35 bytes
p=>p.toString(2).match(/^(1*)01$/)
Try it online!
edited 42 mins ago
answered 1 hour ago
tshtsh
9,32511652
9,32511652
add a comment |
add a comment |
Tau is a new contributor. Be nice, and check out our Code of Conduct.
Tau is a new contributor. Be nice, and check out our Code of Conduct.
Tau is a new contributor. Be nice, and check out our Code of Conduct.
Tau is a new contributor. Be nice, and check out our Code of Conduct.
If this is an answer to a challenge…
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1
$begingroup$
You've essentially made two separate challenges, one a decision problem and one about outputting the next number of a sequence. This will not do what you want, which is invite more answers, but instead put off users who now need to consider three options about what to program before posting. I'd recommend removing the option, and in the future you can try posting to our sandbox first where hopefully you will get helpful feedback before posting. Good luck!
$endgroup$
– FryAmTheEggman
1 hour ago
$begingroup$
@SriotchilismO'Zaic thanks for the feedback! I have edited the post.
$endgroup$
– Tau
1 hour ago
1
$begingroup$
I'd also recommend removing the hard coding restriction. By default solutions would need to handle all cyclops numbers in theory, and there are clearly infinitely many of them, so they couldn't all be hardcoded.
$endgroup$
– FryAmTheEggman
1 hour ago
1
$begingroup$
Note: This is A129868
$endgroup$
– tsh
1 hour ago
2
$begingroup$
Should
119
be true?$endgroup$
– Quintec
1 hour ago