Code samples & Online tools
How to generate random UUID v4 in Nodejs. There are 3 ways to do that. This article shows the 3 ways with code examples. Table of Contents1. Use built-in crypto module2. Install UUID module3. Create UUID utility methodRelated articles1. Use… Read more3 ways to generate random UUID v4 in Node.js
How to use shared memory cache in Node.js. Node.js itself doesn’t have a memory cache function. So a module for memory cache is needed. This article explains how to use that module with example code. Table of ContentsWhich module should… Read moreHow to use shared memory cache in Node.js with example codes
How to parse FormData of request in Node.js with sample codes. This article explains how to do this with code examples. Table of ContentsWrong way to parse FormDataInstall express-formidable moduleCorrect way to parse FormDataRelated articlesWrong way to parse FormData FormData… Read moreHow to parse FormData of request in Node.js + Express with sample codes
How to get Object keys as string in JavaScript. There are 3 ways to do that. This article explains the 3 ways with sample codes. Table of Contents1. Use Object.keys() method2. Use Object.getOwnPropertyNames()Difference from Object.keys()3. Use Object.entries() method1. Use Object.keys()… Read more3 ways to get Object keys as string in JavaScript
How to get browser languages in Node.js (Express.js). This article explains 2 ways to do so with example codes. Table of ContentsWhat’s Accept-Language header?Get language codes by using regexGet languages by locale libraryRelated articlesWhat’s Accept-Language header? You can get browser… Read more2 ways to get browser language in Node.js with sample codes
How to get country code in Node.js? E.G : ‘US’ , ‘BR’ , ‘JP’ , .. This article explains the way with sample codes. Table of Contents1. Install request-ip module2. Install geoip-lite module3. Get country code by geoip-liteIf only country code… Read moreHow to get country code by IP in Node.js with sample codes
How to format Date in JavaScript. There are 4 ways to format date time. This article explains those methods with code examples. Table of Contents1. Format by using Date.toISOString()2. Format by template literal3. Format by Date utility methods4. Format by… Read more4 ways to format datetime in JavaScript with sample codes
How to group object array by a certain key in JavaScript? There are 2 ways for that. This article explains the ways with sample codes. Table of ContentsExample objects to be grouped by1. GroupBy to use Array.reduce()2. GroupBy to use… Read more2 ways of GroupBy on object array in JavaScript with sample codes
How to partial update JSON in MySQL. This article explains how to do so with SQL examples. Table of ContentsWhat’s JSON data type in MySQL?Create table with JSON columnPartial update JSON columnMySQL functions for JSON updatesIncrement partial value within JSONWhat’s… Read moreHow to partial update JSON column in MySQL with sample codes
The question you are seeking an answer to : How can I set Cache-Control in Node.js? How can I enable browser caching in Express.js? The key is to properly get and set the following headers. Cache-Control header ETag header Vary… Read moreHow to set Cache-Control header correctly in node.js + express.js