Created
March 17, 2023 16:38
-
-
Save 15joeybloom/ee8b6bbb5b684537701f4018b37d270d to your computer and use it in GitHub Desktop.
Validate a siteswap pattern
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package main | |
import ( | |
"errors" | |
"fmt" | |
) | |
func isValidSiteswap(pattern []int) error { | |
total := 0 | |
numBeats := 0 | |
for _, x := range pattern { | |
total += x | |
if numBeats < x { | |
numBeats = x | |
} | |
} | |
if total%len(pattern) != 0 { | |
return errors.New(fmt.Sprintf( | |
"Pattern average is not a whole number")) | |
} | |
beats := make([]bool, numBeats) | |
for i, x := range pattern { | |
if beats[(i+x)%numBeats] { | |
return errors.New(fmt.Sprintf( | |
"Conflict on beat %d", i+x)) | |
} else { | |
beats[(i+x)%numBeats] = true | |
} | |
} | |
return nil | |
} | |
func main() { | |
isValidSiteswap([]int{5}) | |
// nil | |
isValidSiteswap([]int{5, 3, 1}) | |
// nil | |
isValidSiteswap([]int{4, 4, 1}) | |
// nil | |
isValidSiteswap([]int{4, 4, 4, 1}) | |
// Pattern average is not a whole number | |
isValidSiteswap([]int{5, 1, 3}) | |
// Conflict on beat 5 | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment