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Unicode和UTF-8之间的关系

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Lines changed: 22 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -1,10 +1,30 @@`
`1`	`1`	`package main`
`2`	`2`
`3`		`-// interface define 元音`
	`3`	`+import (`
	`4`	`+ "fmt"`
	`5`	`+)`
	`6`	`+`
	`7`	`+// interface define 元音,接口中只能定义方法哦`
`4`	`8`	`type VowelsFinder interface {`
`5`	`9`	`FindVowels() []rune`
`6`	`10`	`}`
`7`	`11`
`8`		`-funcmain() {`
	`12`	`+typeMyStringstring`
`9`	`13`
	`14`	`+// 方法`
	`15`	`+func (ms MyString) FindVowels() []rune {`
	`16`	`+ var vowels []rune`
	`17`	`+ for _, rune := range ms {`
	`18`	`+ if rune == 'a' \|\| rune == 'e' \|\| rune == 'i' \|\| rune == 'o' \|\| rune == 'u' {`
	`19`	`+ vowels = append(vowels, rune)`
	`20`	`+ }`
	`21`	`+ }`
	`22`	`+ return vowels`
	`23`	`+}`
	`24`	`+`
	`25`	`+func main() {`
	`26`	`+ name := MyString("Sam Anderson")`
	`27`	`+ var v VowelsFinder`
	`28`	`+ v = name`
	`29`	`+ fmt.Printf("Vowels are %c", v.FindVowels())`
`10`	`30`	`}`

Lines changed: 24 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,24 @@`
	`1`	`+package main`
	`2`	`+`
	`3`	`+import (`
	`4`	`+ "fmt"`
	`5`	`+ "unicode/utf8"`
	`6`	`+)`
	`7`	`+`
	`8`	`+func main() {`
	`9`	`+ s := "hello 你好" // 8 = 5个字符 + 1个空格 + 2个汉字`
	`10`	`+ fmt.Println("len(s):", len(s)) // len(s): 12`
	`11`	`+`
	`12`	`+ var str = "hello 你好"`
	`13`	`+`
	`14`	`+ //golang中string底层是通过byte数组实现的,直接求len 实际是在按字节长度计算所以一个汉字占3个字节算了3个长度`
	`15`	`+ fmt.Println("len(str):", len(str))`
	`16`	`+`
	`17`	`+ //以下两种都可以得到str的字符串长度`
	`18`	`+`
	`19`	`+ //golang中的unicode/utf8包提供了用utf-8获取长度的方法`
	`20`	`+ fmt.Println("RuneCountInString:", utf8.RuneCountInString(str))`
	`21`	`+`
	`22`	`+ // 通过rune类型处理unicode字符`
	`23`	`+ fmt.Println("rune:", len([]rune(str)))`
	`24`	`+}`

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