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bytes, strings: simplify Join

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R=gri, rsc
CC=golang-dev
https://golang.org/cl/4300044
This commit is contained in:
Evan Shaw 2011-03-29 01:27:38 -04:00 committed by Russ Cox
parent ac74f14b6b
commit 47f4ae1a78
2 changed files with 8 additions and 28 deletions
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18
src/pkg/bytes/bytes.go
View File

@ -293,20 +293,10 @@ func Join(a [][]byte, sep []byte) []byte {
}
b := make([]byte, n)
bp := 0
for i := 0; i < len(a); i++ {
s := a[i]
for j := 0; j < len(s); j++ {
b[bp] = s[j]
bp++
}
if i+1 < len(a) {
s = sep
for j := 0; j < len(s); j++ {
b[bp] = s[j]
bp++
}
}
bp := copy(b, a[0])
for _, s := range a[1:] {
bp += copy(b[bp:], sep)
bp += copy(b[bp:], s)
}
return b
}

18
src/pkg/strings/strings.go
View File

@ -275,20 +275,10 @@ func Join(a []string, sep string) string {
}
b := make([]byte, n)
bp := 0
for i := 0; i < len(a); i++ {
s := a[i]
for j := 0; j < len(s); j++ {
b[bp] = s[j]
bp++
}
if i+1 < len(a) {
s = sep
for j := 0; j < len(s); j++ {
b[bp] = s[j]
bp++
}
}
bp := copy(b, a[0])
for _, s := range a[1:] {
bp += copy(b[bp:], sep)
bp += copy(b[bp:], s)
}
return string(b)
}