An asked-for-in #go-nuts extension to quickly create a repeated

	copy of a string or a byte array.
        strings.Repeat("-", 50)
	bytes.Repeat(b, 99)

R=rsc
http://codereview.appspot.com/155063

Committer: Russ Cox <rsc@golang.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/src/pkg/strings/strings.go b/src/pkg/strings/strings.go
index 055d7d1e9..7ccfc5ca8 100644
--- a/src/pkg/strings/strings.go
+++ b/src/pkg/strings/strings.go
@@ -188,6 +188,20 @@ func Map(mapping func(rune int) int, s string) string {
 	return string(b[0:nbytes]);
 }
 
+// Repeat returns a new string consisting of count copies of the string s.
+func Repeat(s string, count int) string {
+	b := make([]byte, len(s)*count);
+	bp := 0;
+	for i := 0; i < count; i++ {
+		for j := 0; j < len(s); j++ {
+			b[bp] = s[j];
+			bp++;
+		}
+	}
+	return string(b);
+}
+
+
 // ToUpper returns a copy of the string s with all Unicode letters mapped to their upper case.
 func ToUpper(s string) string	{ return Map(unicode.ToUpper, s) }