Generating Regular Expression Code Across JavaScript, Python, Go, and Java

Writing a regular expression pattern is only half the battle; integrating it into your programming language requires understanding language-specific escaping rules, match objects, and flags.

Generate ready-to-run code with the Regex to Code Generator.

Cross-Language Regex Comparison

JavaScript

const pattern = /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/i;
const isValid = pattern.test(inputString);
const matches = inputString.match(pattern);

Python

import re

pattern = re.compile(r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$', re.IGNORECASE)
is_valid = bool(pattern.search(input_string))
match = pattern.search(input_string)

Go

package main

import "regexp"

var pattern = regexp.MustCompile(`(?i)^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$`)
isValid := pattern.MatchString(inputString)

Generate complete code snippets for your preferred stack with the Regex to Code Generator.