终生学习者...
I want to learn English every day.
讨论数量:
var buf bytes.Buffer
for i:=0; i < n; i++{
buf.WriteString("string")
}
buf.String()
func builderConcat(n int, str string) string {
var builder strings.Builder
for i := 0; i < n; i++ {
builder.WriteString(str)
}
return builder.String()
}
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