21 lines
366 B
Go
21 lines
366 B
Go
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package main
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import (
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"strings"
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"unicode"
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)
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func main() {
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var b strings.Builder
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b.Write([]byte("Hello "))
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b.WriteString("World")
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println("len:", b.Len(), "cap:", b.Cap(), "string:", b.String())
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f := func(c rune) bool {
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return unicode.Is(unicode.Han, c)
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}
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println(strings.IndexFunc("Hello, 世界", f))
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println(strings.IndexFunc("Hello, world", f))
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}
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