#iteration code explainers

php

<?php
 
declare(strict_types=1);

Counting business days in PHP

dates immutability hash-lookup

Intermediate 7 steps

go

package textutil
 
import "strings"

Extracting delimited text with strings.Cut

string-parsing delimiters standard-library

Beginner 7 steps

rust

pub fn collapse_whitespace(input: &str) -> String {
    let mut result = String::with_capacity(input.len());
    let mut in_whitespace = false;

Collapsing runs of whitespace in Rust

string-processing state-machine iteration

Beginner 5 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