golang 字符串/string

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s := "abcdefg"
s = string([]byte(s)[:3])
fmt.Println(s) //得到 "abc"

s := "abcdefg"
s = string([]byte(s)[3:])
fmt.Println(s) //得到 "efg"

s := "12121211122"
first3 := s[0:3]
last3  := s[len(s)-3:]

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fmt.Println("go"=="go")
fmt.Println("GO"=="go")

fmt.Println(strings.Compare("GO","go"))
fmt.Println(strings.Compare("go","go"))

fmt.Println(strings.EqualFold("GO","go"))

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if len(mystring) > 0 { }
if mystring != "" { }

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s = fmt.Sprintf("%s[%s]", s, v)

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func main() {
    log.Println(fmt.Sprintf("%013d", 1))
}