查找格式错误的带引号的字符串的正则表达式

Question

I am trying to build an regular expression for sub string which have a starting quote but didn't have ending quote. Below is an sample string

"The fish was 2 long. I said: Give me that fish!.
The fish was 2" long. I said: Give me that fish!.
"The fish was 2 long. I said: Give me that fish!."
The fish "was 2 long". I said: "Give me that fish!.

So the valid output for the expression would be

String 1 - The fish was 2 long. I said: Give me that fish!
String 2 -  long. I said: Give me that fish!.
String 3 - No output
String 4 - Give me that fish!.

Any thoughts how I can build the regular expression.

Answer 1

Doing all with regex can be done.. will take some more time to perfect the solution. But using some strings function will make it bit easy for you.

Hope this helps!!

package main

import (
"fmt"
"regexp"
"strings"
)

func main() {
str := `
    "The fish was 2 long. I said: Give me that fish!.
The fish was 2" long. I said: Give me that fish!.
"The fish was 2 long. I said: Give me that fish!."
""sdfsdf
`
splitStr := strings.Split(str, "
")
re := regexp.MustCompile(`"{1}[A-Za-z0-9 .:!]+"{0}[A-Za-z0-9 .:!]+$`)
for _,v := range splitStr {
    if len(strings.Trim(v, " ")) >= 0{
    // some extra check
    if strings.Count(v, "\"") % 2 == 1 {
        fmt.Println( re.FindString(v))
    }

    } 
}

}

Code sample available here: https://play.golang.org/p/LYte6FRocv3