Go: regexp matching a pattern AND then another pattern-CodePudding

I have the following Golang code:

package main

import (
    "fmt"
    "regexp"
)

func main() {
    // dummy text data
    blob := `
    #s-kiwi
    foo
    #e-kiwi
    #s-banana
        bar
    #e-banana
    #s-mango
    baz
    #e-mango
    `

    // try to match two lines
    fruit := "banana"
    result, _ := regexp.MatchString("#[se]-" fruit, blob)
    fmt.Println(result)
}

Go playground link: https://go.dev/play/p/p9Q4HYijx9m

I am trying to achieve a full matching with the usage of an AND property. I would like to search for, the pattern #s-banana AND #e-banana just to ensure that the blob text has its enclosing and initiator parameters.

What I have tried is using regexp.MatchString("#[se]-" fruit, blob) but "#[se]-" only matches characters s OR e.

Could this be implemented in a oneliner? Should I add a new regexp condition? If that's the case this does not seem quite polished.

What my desired result is:

Trying to search for two strings in text with regexp on golang using an AND condition.

Many thanks.

CodePudding user response：

It's not completely clear what you are trying to do. But assuming you want to confirm the multiline text contains a pair of tags starting with #s-banana and ending with #e-banana you can search for that, with any number of characters inbetween:

result, _ := regexp.MatchString("(?s)#s-" fruit ".*?#e-" fruit, blob)

That returns true. The initial (?s) allows . to match newlines too, and the .*? matches the shortest sequence of zero or more characters including newlines.