Regular expressions

Context

The regexp package provides regular expression search and match. It uses the RE2 syntax (no backtracking, guaranteed linear time).

Example

Match a pattern and extract submatches.

Code example

package main

import (
    "fmt"
    "regexp"
)

func main() {
    pattern := regexp.MustCompile(`(\w+)=(\d+)`)
    s := "age=30 name=Alice height=175"

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

    // Check if matches
    fmt.Println(pattern.MatchString("foo=123"))
}

Output

key=age, value=30
key=name, value=Alice
key=height, value=175
true

Useful links

• regexp package documentation
• Go by Example: Regular Expressions