Summary of example usage examples of Go language regular expressions [find, match, replace, etc.]

package test
import (
    "fmt"
    "regexp"
)
func RegixBase() {
    //findTest()
    //findIndexTest()
    //findStringTest()
    //findChinesString()
    //findNumOrLowerLetter()
    findAndReplace()
}
//Pass in []byte, return []byte
func findTest() {
    str := "ab001234hah120210a880218end"
reg := ("\\d{6}") //Six consecutive numbers
    ("------Find------")
//Return the first string matching reg in str
    data := ([]byte(str))
    (string(data))
    ("------FindAll------")
//Return all strings matching reg in str
//The second parameter indicates the maximum number of returned numbers, and passing -1 indicates that all results are returned
    dataSlice := ([]byte(str), -1)
    for _, v := range dataSlice {
        (string(v))
    }
}
//Pass in []byte, return to the index of the first and last position
func findIndexTest() {
    ("------FindIndex------")
//Return the first and last positions of the first matching string
reg2 := ("start\\d*end") //start starts, ends ends, all numbers in the middle
    str2 := "00start123endhahastart120PSend09start10000end"
//index[0] represents the start position, index[1] represents the end position
    index := ([]byte(str2))
    ("start:", index[0], ",end:", index[1], str2[index[0]:index[1]])
    ("------FindAllIndex------")
//Return the first and last positions of all matching strings
    indexSlice := ([]byte(str2), -1)
    for _, v := range indexSlice {
        ("start:", v[0], ",end:", v[1], str2[v[0]:v[1]])
    }
}
//Passing in string and returning string (more convenient)
func findStringTest() {
    ("------FindString------")
    str := "ab001234hah120210a880218end"
reg := ("\\d{6}") //Six consecutive numbers
    ((str))
    ((str, -1))
//The following two methods are similar
    ((str))
    (([]byte(str)))
}
//Find Chinese characters
func findChinesString() {
str := "Hello China and the world peace is good"
    reg := ("[\\p{Han}]+")
    ((str, -1))
//[China World Peace is Good]
}
//Find numbers or lowercase letters
func findNumOrLowerLetter() {
    str := "HAHA00azBAPabc09FGabHY99"
    reg := ("[\\d|a-z]+")
    ((str, -1))
    //[00az abc09 ab 99]
}
//Find and replace
func findAndReplace() {
    str := "Welcome for Beijing-Tianjin CRH train."
    reg := (" ")
((str, "@")) //Replace space with @ characters
    //Welcome@for@Beijing-Tianjin@CRH@train.
}