regexp-Compile.go

regexp-Compile.go

package main
import (
	"fmt"
	"regexp"
	"strconv"
)
func main() {
	//目标字符串
	searchIn := "John: 2578.34 William: 4567.23 Steve: 5632.18"
	pat := "[0-9]+.[0-9]+" //正则

	f := func(s string) string{
    	v, _ := strconv.ParseFloat(s, 32)
    	return strconv.FormatFloat(v * 2, 'f', 2, 32)
	}

	if ok, _ := regexp.Match(pat, []byte(searchIn)); ok {
    fmt.Println("Match Found!")
	}

	re, _ := regexp.Compile(pat)
	//将匹配到的部分替换为"##.#"
	str := re.ReplaceAllString(searchIn, "##.#")
	fmt.Println(str)
	//参数为函数时
	str2 := re.ReplaceAllStringFunc(searchIn, f)
	fmt.Println(str2)
}