How to Replace with Regex in Go

Use the regexp package's ReplaceAllString function to replace all matches of a pattern with a replacement string. Compile the pattern once, then call ReplaceAllString on your target string.

package main

import (
	"fmt"
	"regexp"
)

func main() {
	pattern := regexp.MustCompile(`\d+`)
	text := "Room 101, Floor 2"
	result := pattern.ReplaceAllString(text, "X")
	fmt.Println(result) // Output: Room X, Floor X
}

Replace with Regex in Go by finding and swapping out text patterns. Think of it like a "Find and Replace" tool in a word processor, but you can use complex rules to find things like numbers, dates, or specific word structures instead of just exact phrases.