How to iterate through regex matching groups

Question

say my data looks like this:

name=peter 
age=40
id=99

I can create a regex

(\\w+)=(\\w+)

To match name, age,

Answer 1

Use FindAllStringSubmatch to find all the matches:

pat := regexp.MustCompile(`(\w+)=(\w+)`)
matches := pat.FindAllStringSubmatch(data, -1) // matches is [][]string

Iterate through the matched groups like this:

for _, match := range matches {
    fmt.Printf("key=%s, value=%s\n", match[1], match[2])
}

Check for "id" by comparing with match[1]:

for _, match := range matches {
    if match[1] == "id" {
        fmt.Println("the id is: ", match[2])
    }
}

Get the third match by indexing:

match := matches[2] // third match
fmt.Printf("key=%s, value=%s\n", match[1], match[2])

playground example