Sha256: 4c45b4d171efe4cbded4b0479577d9a655635d6da6b23d026cd8f20d5d4b206f
Contents?: true
Size: 1.81 KB
Versions: 122
Compression:
Stored size: 1.81 KB
Contents
package beer
import (
"bytes"
"fmt"
)
// Song returns the full lyrics for 99 bottles of beer
func Song() (result string) {
result, _ = Verses(99, 0)
return
}
// Verses returns an excerpt of the lyrics of 99 bottles of beer
// between verse start and stop. The verse numbers count backwards, so the
// first verse sung will be verse 99, and the last will be verse 0
func Verses(start, stop int) (string, error) {
switch {
case 0 > start || start > 99:
return "", fmt.Errorf("start value[%d] is not a valid verse", start)
case 0 > stop || stop > 99:
return "", fmt.Errorf("stop value[%d] is not a valid verse", stop)
case start < stop:
return "", fmt.Errorf("start value[%d] is less than stop value[%d]", start, stop)
}
var buff bytes.Buffer
for i := start; i >= stop; i-- {
v, _ := Verse(i)
buff.WriteString(v)
buff.WriteString("\n")
}
return buff.String(), nil
}
// Verse returns a single verse of the lyrics of 99 bottles of beer. The verse
// numbers count backwards, so the first verse sung will be verse 99, and the
// last will be verse 0
func Verse(n int) (string, error) {
result := ""
switch {
case 0 > n || n > 99:
return "", fmt.Errorf("%d is not a valid verse", n)
case n == 0:
result = "No more bottles of beer on the wall, no more bottles of beer.\nGo to the store and buy some more, 99 bottles of beer on the wall.\n"
case n == 1:
result = "1 bottle of beer on the wall, 1 bottle of beer.\nTake it down and pass it around, no more bottles of beer on the wall.\n"
case n == 2:
result = "2 bottles of beer on the wall, 2 bottles of beer.\nTake one down and pass it around, 1 bottle of beer on the wall.\n"
default:
result = fmt.Sprintf("%d bottles of beer on the wall, %d bottles of beer.\nTake one down and pass it around, %d bottles of beer on the wall.\n", n, n, n-1)
}
return result, nil
}
Version data entries
122 entries across 122 versions & 1 rubygems