Communities

Writing
Writing
Codidact Meta
Codidact Meta
The Great Outdoors
The Great Outdoors
Photography & Video
Photography & Video
Scientific Speculation
Scientific Speculation
Cooking
Cooking
Electrical Engineering
Electrical Engineering
Judaism
Judaism
Languages & Linguistics
Languages & Linguistics
Software Development
Software Development
Mathematics
Mathematics
Christianity
Christianity
Code Golf
Code Golf
Music
Music
Physics
Physics
Linux Systems
Linux Systems
Power Users
Power Users
Tabletop RPGs
Tabletop RPGs
Community Proposals
Community Proposals
tag:snake search within a tag
answers:0 unanswered questions
user:xxxx search by author id
score:0.5 posts with 0.5+ score
"snake oil" exact phrase
votes:4 posts with 4+ votes
created:<1w created < 1 week ago
post_type:xxxx type of post
Search help
Notifications
Mark all as read See all your notifications »
Challenges

Comments on The Camelot Wheel

Parent

The Camelot Wheel

+3
−0

Given a musical key, output its number and letter on the Camelot Wheel (shown below).

Camelot Wheel

Input

A musical key as a string, as shown on the wheel. The words "Sharp" and "Flat" may be replaced with symbols (such as "#" and "b") if you wish.

Output

The number and letter, either as a string, tuple, or array.

Examples:

Input->Output
"E Major" -> "12B"
"F-Sharp Minor" -> "11A"
"Bb Minor" -> "3A"

This is code-golf.

History
Why does this post require attention from curators or moderators?
You might want to add some details to your flag.
Why should this post be closed?

1 comment thread

General comments (2 comments)
Post
+3
−0

Python 3, 101, 98, 94 bytes

First answer!

lambda s:f"{(('FCGDAEB'.index(s[0])-~-ord(s[5])*('-'in s)-3*('i'in s)-6)%12)+1}"+'BA'['i'in s]

Try it online!

Readable version:

def f(s):
 n="FCGDAEB".index(s[0])-6
 if '-' in s:
  n -= ord(s[5]-1)
 if 'i' in s:
  n -= 3

 return f"{(n%12)+1}"+'BA'['i'in s]

Python 3.9, 95, 91 bytes:

lambda s:f"{(('FCGDAEB'.index(s[0])-~-ord(s[5])*('-'in s)-3*(m:='i'in s)-6)%12)+1}"+'BA'[m]

Isn't the walrus operator great?

History
Why does this post require attention from curators or moderators?
You might want to add some details to your flag.

1 comment thread

General comments (1 comment)
General comments
Quintec‭ wrote almost 4 years ago

+1 for the walrus operator