#internationalization code explainers

typescript

import { Pipe, PipeTransform, Inject, LOCALE_ID } from '@angular/core';
 
interface MoneyOptions {
  currency?: string;

Building a cached money pipe in Angular

pipes memoization internationalization

Intermediate 8 steps

ruby

class Contact < ApplicationRecord
  PHONE_FORMATS = {
    "US" => /\A\+1\d{10}\z/,
    "GB" => /\A\+44\d{10}\z/,

Country-aware phone validation in Rails

validation callbacks regex

Intermediate 6 steps

go

package middleware
 
import (
	"net/http"

Localized validation errors in Gin

middleware internationalization validation

Intermediate 8 steps

typescript

type CurrencyFormatOptions = {
  locale?: string;
  currency: string;
  showDecimals?: boolean;

Caching Intl.NumberFormat for currency

memoization internationalization caching

Intermediate 9 steps

python

from decimal import Decimal, ROUND_HALF_UP
 
from babel.numbers import format_currency
from flask import Flask

Building a currency Jinja filter in Flask

template filters decimal precision internationalization

Intermediate 6 steps

javascript

const formatters = new Map();
 
function getFormatter(locale, currency) {
  const key = `${locale}:${currency}`;

Caching Intl.NumberFormat for currency formatting

memoization internationalization caching

Intermediate 8 steps

javascript

const DIVISIONS = [
  { amount: 60, unit: 'seconds' },
  { amount: 60, unit: 'minutes' },
  { amount: 24, unit: 'hours' },

Building a human-friendly timeAgo formatter

internationalization relative-time lookup-table

Intermediate 6 steps

java

package com.example.billing;
 
import java.math.BigDecimal;
import java.math.RoundingMode;

Locale-aware currency formatting in Java

internationalization rounding immutability

Intermediate 6 steps

php

<?php
 
namespace App\Support;

Locale-aware formatting with PHP's intl extension

internationalization encapsulation constructor-injection

Intermediate 7 steps

typescript

const DIVISIONS: { amount: number; unit: Intl.RelativeTimeFormatUnit }[] = [
  { amount: 60, unit: "seconds" },
  { amount: 60, unit: "minutes" },
  { amount: 24, unit: "hours" },

Human-readable relative times with Intl

internationalization date-formatting lookup-table

Intermediate 7 steps

php

<?php
 
namespace App\Rules;

How a custom phone validation rule works in Laravel

validation custom-rules dependency

Intermediate 6 steps