#hashing code explainers

rust

use axum::body::Bytes;
use axum::http::{header, HeaderValue, StatusCode};
use axum::response::{IntoResponse, Response};
use serde::Serialize;

Custom Axum responses with per-user ETags

etag trait-implementation generics

Intermediate 7 steps

python

import hashlib
from collections import defaultdict
from pathlib import Path

Finding duplicate files by size then hash

hashing file-io deduplication

Intermediate 7 steps

php

<?php
 
namespace App\FeatureFlags;

How a feature flag evaluator decides

feature-flags rollout hashing

Intermediate 8 steps

php

<?php
 
namespace App\Queue;

Deduplicating a job queue with Redis

deduplication redis atomicity

Advanced 8 steps

ruby

class UserColor
  GOLDEN_RATIO_CONJUGATE = 0.618033988749895
 
  def initialize(username)

Deriving a stable color from a username

hashing color-theory deterministic-mapping

Intermediate 7 steps

python

import hashlib
import json
from fastapi import APIRouter, Request, Response, Depends, HTTPException, status

HTTP ETag caching in a FastAPI route

http-caching etag conditional-requests

Intermediate 9 steps

java

public class DuplicateFinder {
 
    public Map<String, List<Path>> findDuplicates(Path root) throws IOException {
        Map<String, List<Path>> byHash = new HashMap<>();

Finding duplicate files by content hash

hashing file-io streams

Intermediate 8 steps

rust

use std::fs::File;
use std::io::{self, Read};
use std::path::Path;

Streaming a SHA-256 hash of a file in Rust

hashing buffered-io streaming

Intermediate 5 steps

go

package checksum
 
import (
	"crypto/sha256"

Computing SHA-256 checksums in Go

hashing io-streaming filesystem-walk

Intermediate 7 steps

php

<?php
 
namespace App\Services;

Phone verification codes in Laravel

rate-limiting caching hashing

Intermediate 7 steps

ruby

require "digest"
 
class UploadDeduplicator
  CHUNK_SIZE = 64 * 1024

Deduplicating uploads by content hash

hashing deduplication streaming-io

Intermediate 7 steps

python

import hashlib
from pathlib import Path

Streaming SHA-256 checksums in Python

hashing file-io streaming

Intermediate 6 steps

java

public final class FileChecksum {
 
    private static final char[] HEX = "0123456789abcdef".toCharArray();

Streaming a SHA-256 file checksum in Java

hashing streams resource-management

Intermediate 7 steps