#string-parsing code explainers

php

<?php
 
class NameParser
{

Parsing a full name into components in PHP

string-parsing arrays normalization

Intermediate 8 steps

java

public static Map<String, String> parseCookieHeader(String header) {
    Map<String, String> cookies = new LinkedHashMap<>();
    if (header == null || header.isBlank()) {
        return cookies;

Parsing an HTTP Cookie header in Java

string-parsing http url-decoding

Intermediate 6 steps

go

package textutil
 
import "strings"

Extracting delimited text with strings.Cut

string-parsing delimiters standard-library

Beginner 7 steps

go

package useragent
 
import (
	"regexp"

Parsing user-agent strings in Go

regex string-parsing ordering

Intermediate 7 steps

javascript

function isValidCardNumber(input) {
  const digits = String(input).replace(/[\s-]/g, '');
 
  if (!/^\d{13,19}$/.test(digits)) {

Validating card numbers with Luhn

checksum validation luhn-algorithm

Intermediate 7 steps

java

public final class NaturalOrderComparator implements Comparator<String> {
 
    public static final NaturalOrderComparator INSTANCE = new NaturalOrderComparator();

Natural-order string sorting in Java

comparator natural-sort string-parsing

Intermediate 9 steps

javascript

function splitFullName(fullName) {
  const cleaned = (fullName || '').trim().replace(/\s+/g, ' ');
 
  if (!cleaned) {

Parsing full names into first and last

string-parsing regex edge-cases

Intermediate 8 steps