codesnips
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
java 
package com.example.rates.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.retry.annotation.EnableRetry;
import org.springframework.web.client.RestTemplate;

Retrying a Flaky External API with Spring Retry @Retryable and @Recover Fallback

spring-boot spring-retry resilience
by codesnips 4 tabs
typescript 
import { createContext } from "react";

export type ToastVariant = "info" | "success" | "error";

export interface Toast {
  id: string;

Toast Notification Queue with a useToast Hook and Context Provider in React

react hooks context
by codesnips 4 tabs
ruby 
class ReportsController < ApplicationController
  def monthly_sales
    year = params.fetch(:year, Date.current.year).to_i
    rows = Order.monthly_sales(year: year)
    @report = MonthlySalesReport.new(rows, year: year)

Aggregate Monthly Sales Reports in Rails with group_by SQL and a Presenter

rails postgres reporting
by codesnips 3 tabs
java 
package com.example.feed;

import java.nio.charset.StandardCharsets;
import java.time.Instant;
import java.util.Base64;

Keyset (Cursor) Pagination with Spring Data JPA and Base64 Cursors

spring spring-data jpa
by codesnips 3 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
php 
<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

Syncing Article Tags Through a Many-to-Many Pivot in Laravel

laravel eloquent many-to-many
by codesnips 4 tabs
python 
from dataclasses import dataclass


class ConfigError(Exception):
    pass

Typed Argparse Subcommands with Dataclasses and Handler Dispatch

argparse cli dataclasses
by codesnips 3 tabs
go 
package bank

import "errors"

var ErrVersionConflict = errors.New("optimistic lock: version conflict")
var ErrInsufficientFunds = errors.New("insufficient funds")

Optimistic Locking in Go With a Version Column on UPDATE

optimistic-locking concurrency postgres
by codesnips 3 tabs
rust 
use std::os::raw::c_int;

pub const LOCK_EX: c_int = 2;
pub const LOCK_NB: c_int = 4;
pub const LOCK_UN: c_int = 8;

RAII File Lock Guard in Rust With Drop-Based Release

rust raii drop
by codesnips 3 tabs
typescript 
import { z } from "zod";

export const signupSchema = z
  .object({
    email: z.string().min(1, "Email is required").email("Enter a valid email"),
    username: z

React Signup Form Validation With Zod and Field-Level Errors

react zod forms
by codesnips 3 tabs
typescript 
import { Injectable, signal, computed } from '@angular/core';

export interface CurrentUser {
  id: string;
  email: string;
  roles: string[];

Guarding a Lazy-Loaded Angular Admin Route with a Functional CanActivate Role Check

angular routing lazy-loading
by codesnips 3 tabs