Code explainers tagged #caching

import { useState, useEffect, useCallback, useRef } from 'react';
 
const cache = new Map();
const inflight = new Map();

<?php
 
namespace App\Services;
 

import secrets
 
from django.contrib.auth import authenticate, login
from django.core.cache import cache

import { Pipe, PipeTransform } from '@angular/core';
 
@Pipe({
  name: 'chunk',

from django.db import connections
from django.db.utils import OperationalError
from django.core.cache import caches
from django.http import JsonResponse

<?php
 
namespace App\Services;
 

const crypto = require('crypto');
 
function idempotency({ store, ttlMs = 24 * 60 * 60 * 1000 }) {
  return async function idempotencyMiddleware(req, res, next) {

package routing
 
import (
	"net/http"

@Service
public class ProductLookupService {
 
    private final ProductRepository productRepository;

import hashlib
import json
from functools import wraps
from flask import g, request, jsonify, current_app

import {
  CallHandler,
  ConflictException,
  ExecutionContext,

type CacheEntry<V> = {
  value: V;
  computedAt: number;
};

import { Injectable, Scope } from '@nestjs/common';
import DataLoader from 'dataloader';
import { InjectRepository } from '@nestjs/typeorm';
import { In, Repository } from 'typeorm';

class RequestDeduplicator {
  constructor(fetcher) {
    this.fetcher = fetcher;
    this.inFlight = new Map();

type CompactOptions = {
  locale?: string;
  maximumFractionDigits?: number;
};

@Component
public class ApiKeyRotationFilter extends OncePerRequestFilter {
 
    private static final String API_KEY_HEADER = "X-Api-Key";

import {
  CallHandler,
  ExecutionContext,
  Injectable,

namespace App\Console\Commands;
 
use App\Models\Region;
use App\Services\ReportBuilder;