rust
use serde::{Deserialize, Deserializer};

#[derive(Debug, Deserialize)]
pub struct ListFilter {
    #[serde(default)]
    pub status: Status,

Parse URL Query Strings into a Typed Filter Struct with Defaults in Rust

rust serde query-string
by codesnips 3 tabs
lua
-- KEYS[1] = bucket key
-- ARGV[1] = capacity, ARGV[2] = refill_per_sec, ARGV[3] = now (float seconds)
local capacity = tonumber(ARGV[1])
local rate = tonumber(ARGV[2])
local now = tonumber(ARGV[3])

Redis-Backed Token Bucket Rate Limiter as FastAPI Middleware

fastapi redis rate-limiting
by codesnips 4 tabs
java
package com.shop.orders.events;

import java.math.BigDecimal;
import java.time.Instant;

public record OrderPlacedEvent(

Transactional Domain Events With Spring's ApplicationEventPublisher and @TransactionalEventListener

spring spring-boot domain-events
by codesnips 4 tabs
ruby
class AddSoftDeleteToUsers < ActiveRecord::Migration[7.1]
  def change
    add_column :users, :deleted_at, :datetime

    add_index :users, :deleted_at, where: "deleted_at IS NULL", name: "index_users_on_live"

Soft-Delete with a Default Scope, Restore Action, and Unique Index Guard in Rails

rails activerecord soft-delete
by codesnips 3 tabs
typescript
import { useEffect, useState } from "react";

export function useDebouncedValue<T>(value: T, delay = 300): T {
  const [debounced, setDebounced] = useState<T>(value);

  useEffect(() => {

Build a Debounced Search Box in React with a Reusable useDebouncedValue Hook

react hooks typescript
by codesnips 3 tabs
ruby
require 'sinatra'
require 'json'
require_relative 'book'
require_relative 'helpers'

set :books, {

Sinatra Content Negotiation: Serve HTML or JSON by Accept Header

sinatra rack content-negotiation
by codesnips 4 tabs
ruby
class AddSlugToArticles < ActiveRecord::Migration[7.1]
  def change
    add_column :articles, :slug, :string
    add_index :articles, :slug, unique: true

    reversible do |dir|

Auto-Generating URL Slugs in Rails with a before_validation Callback and Friendly Finder

rails activerecord slugs
by codesnips 4 tabs
go
package main

import (
	"log"
	"net/http"
	"time"

Instrumenting Go HTTP Handlers with Prometheus Counters and Histograms

prometheus metrics observability
by codesnips 3 tabs
javascript
const multer = require('multer');

const ALLOWED_MIME = new Set(['image/jpeg', 'image/png', 'image/webp']);

function fileFilter(req, file, cb) {
  if (!ALLOWED_MIME.has(file.mimetype)) {

Upload and Resize User Avatars with Multer and Sharp in Express

express multer sharp
by codesnips 3 tabs
java
package com.example.tracing;

import jakarta.servlet.Filter;
import jakarta.servlet.FilterChain;
import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;

Propagate a Correlation ID Through Servlet Requests With MDC and a Feign Interceptor

java servlet filter
by codesnips 3 tabs
typescript
import { Injectable } from '@angular/core';
import { FormBuilder, FormGroup, Validators } from '@angular/forms';

@Injectable()
export class SignupFormService {
  readonly form: FormGroup;

Multi-Step Signup Wizard in Angular with a Shared FormGroup and Stepper Service

angular reactive-forms wizard
by codesnips 4 tabs
ruby
require 'uri'
require 'rack/utils'

module PaginationLinks
  module_function

Cursor-Style Pagination With RFC 5988 Link Headers in Sinatra

sinatra pagination rest-api
by codesnips 3 tabs