Code Explainers

Code explainers tagged #serialization

java 
package com.example.inventory;
 
import org.apache.commons.csv.CSVFormat;
import org.apache.commons.csv.CSVParser;

Reading and writing CSV with Commons CSV

csv-parsing file-io try-with-resources
Intermediate 7 steps
rust 
use serde::{Deserialize, Serialize};
 
#[derive(Debug, Serialize, Deserialize)]
#[serde(tag = "type", rename_all = "snake_case")]

Tagged enums with serde in Rust

enums serialization json
Intermediate 6 steps
go 
package handlers
 
import (
	"net/http"

Content negotiation in Gin handlers

content-negotiation struct-tags rest-api
Intermediate 4 steps
typescript 
type StorageSchema = Record<string, unknown>;
 
interface StorageOptions {
  namespace?: string;

A type-safe wrapper around localStorage

generics type-safety serialization
Intermediate 9 steps
ruby 
class Credentials
  SENSITIVE = %i[password api_key secret_token access_key].freeze
  REDACTED = "[REDACTED]".freeze
 

Redacting secrets in Ruby object output

serialization introspection security
Intermediate 7 steps
python 
from datetime import datetime, date
from decimal import Decimal
from flask import Flask, jsonify
from flask.json.provider import DefaultJSONProvider

Serializing SQLAlchemy models in Flask JSON

serialization orm json
Intermediate 6 steps
python 
from datetime import datetime
from fastapi import APIRouter, Depends, HTTPException, status
from pydantic import BaseModel, ConfigDict, EmailStr
from sqlalchemy.orm import Session

Building a users router in FastAPI

routing serialization dependency-injection
Intermediate 7 steps
python 
import json
from dataclasses import dataclass, field, asdict
from datetime import datetime
from typing import Any

JSON round-tripping with Python dataclasses

dataclasses serialization json
Intermediate 6 steps
rust 
use std::fs::File;
use std::io::{self, BufWriter};
use std::path::Path;
 

Serializing config to JSON in Rust

serialization serde file-io
Intermediate 7 steps
ruby 
class ArticleSerializer < ActiveModel::Serializer
  attributes :id, :title, :slug, :excerpt, :reading_time, :published_at, :url
 
  belongs_to :author, serializer: UserSerializer

Shaping API output with ActiveModel::Serializer in Rails

serialization json api computed attributes
Intermediate 9 steps
javascript 
export function buildPaginationUrl(baseUrl, { page, perPage, filters = {}, sort } = {}) {
  const url = new URL(baseUrl);
  const params = url.searchParams;
 

Building and parsing pagination URLs

url-parsing query-string pagination
Intermediate 8 steps
rust 
use axum::{
    extract::Path,
    http::{header::ACCEPT, HeaderMap, StatusCode},
    response::{Html, IntoResponse, Json, Response},

Content negotiation in an Axum handler

content-negotiation http-headers serialization
Intermediate 8 steps
php 
<?php
 
namespace App\Casts;
 

How a custom Eloquent cast wraps an Address in Laravel

value-objects serialization data-mapping
Intermediate 7 steps
ruby 
module Api
  module V2
    class ArticlesController < Api::BaseController
      before_action :set_article, only: %i[show update destroy]

Building a versioned JSON API controller in Rails

rest-api serialization pagination
Intermediate 10 steps
java 
public class OrderSerializer {
 
    private final ObjectMapper mapper;
 

Configuring a reusable Jackson ObjectMapper

serialization json builder-pattern
Intermediate 8 steps
javascript 
export function cloneState(state) {
  if (typeof structuredClone !== "function") {
    throw new Error("structuredClone is not available in this runtime");
  }

Deep cloning with structuredClone

deep-copy error-handling immutability
Intermediate 7 steps
ruby 
class ConfigFlattener
  def initialize(config)
    @config = config
  end

Flattening nested config into dotted keys

recursion hashes tree-traversal
Intermediate 8 steps
python 
from flask import Blueprint, jsonify, request, abort
 
from .models import Article, db
from .schemas import article_schema, articles_schema

Building a REST articles API with Flask Blueprints

rest-api blueprints serialization
Intermediate 7 steps