#generators code explainers

python

from collections.abc import Mapping
from typing import Any, Iterator

Flattening nested config into dotted keys

recursion generators tree-traversal

Intermediate 7 steps

python

import csv
import io
from datetime import datetime

Streaming a CSV export in Flask

streaming generators csv

Intermediate 9 steps

php

<?php
 
declare(strict_types=1);

Streaming file lines with a PHP generator

generators lazy-evaluation file-io

Intermediate 7 steps

python

from collections import OrderedDict
from typing import Callable, Hashable, Iterable, Iterator, TypeVar
 
T = TypeVar("T")

Two ways to dedupe while keeping order

deduplication generators ordered-data

Intermediate 7 steps

python

import re
from datetime import datetime
from dataclasses import dataclass

Parsing access logs with named regex groups

regex named-groups dataclasses

Intermediate 6 steps

python

import gzip
from pathlib import Path
from typing import Iterator

Streaming TSV records with Python generators

generators lazy-evaluation file-io

Intermediate 5 steps

javascript

class Stack {
  #items = [];
 
  push(value) {

Building a Stack with private fields

data-structures encapsulation iterators

Intermediate 7 steps

javascript

async function* fetchPages(baseUrl, maxPages) {
  let page = 1;
  while (page <= maxPages) {
    const data = await mockFetch(`${baseUrl}?page=${page}`);

Paginated APIs with async generators

async-iterators generators pagination

Advanced 7 steps