#async-generators code explainers

javascript

class MovingAverage {
  constructor(windowSize) {
    if (!Number.isInteger(windowSize) || windowSize <= 0) {
      throw new RangeError('windowSize must be a positive integer');

A rolling average over a fixed window

circular-buffer streaming async-generators

Intermediate 7 steps

python

import asyncio
import json
 
from fastapi import APIRouter, Depends, HTTPException

Streaming export progress with SSE in FastAPI

server-sent-events async-generators streaming

Advanced 8 steps

rust

use axum::{
    extract::State,
    response::sse::{Event, KeepAlive, Sse},
    Json,

Proxying an SSE chat stream in Axum

server-sent-events streaming async-generators

Advanced 10 steps

typescript

interface Page<T> {
  items: T[];
  nextCursor: string | null;
}

Streaming cursor pagination with async generators

async-generators pagination generics

Intermediate 8 steps

python

import csv
import io
from datetime import date

Streaming a CSV export in FastAPI

streaming async-generators csv

Advanced 8 steps