NPM is a package manager for Node.js and it’s a central repository where you can publish your own repos and download the other repositories. By default, every repo you publish is public. You can publish private repositories but, there is a fee for it. Prerequisites There are two prerequisites for this…

📄 Table of Contents SSH vs HTTP IPv4 (Internet Protocol v4) Why IPv6 Subnetting — Why — How Private IPs Router vs Switch How to find Network Id of an IP address How to find Subnet Mask of an IP address convert an IP address into binary format Total no. of hosts/computers that can…

📄 Table of contents Doctype Semantics SEO Link vs Import — — — — — — — — — — — — ♥️ ♥️ ♥️ — — — — — — — — — — — — ◉ Role of DOCTYPE. Yes, DOCTYPE exists to declare that the page uses the standard mode. ◉Best thing about Semantics It is conducive to SEO…

— — — — — — — — — — — — — — — — — — — — — — — — — — — — — — - Stop checking array length using [ ].length > 0, rather [].length will also do the same inside any condition.

📄 Table of Contents ● What is Cloud Computing ● Characteristics of Cloud ● 3 types of Cloud services — Iaas, Pass, Sass ● 3 types of Cloud — Private, Public, Hybrid ● Terminologies used across 3 Clouds ● Microsoft Azure — Virtual Network, Address Range, Subnet, IP Address — establish a connection between 2…

📄 Table of Contents Introduction to K6 — using Options in K6 — iterations & VUs — iterations vs VUs — Shared iterations — Per VU iterations basic K6 example sample basic http.get & http.post requests handleSummary in k6 iterations and VUs checks in k6 Data Parameterization in K6 Testing k6 using stages How…

Promise.all const data = Promise.race([promise1,...]) // iterable object You can extract promise resolved values using either .then syntax:- data.then((values) => { values; // [resultOfPromise1, resultOfPromise2, ...] }).catch(error => { console.log(error) } or async/await: try{ const result = await data; console.log(result); //[resultPromise1, resultPromise2, ...] } catch (error => { console.log(error); }

📄 Table of Contents UNION vs UNION ALL JOINS in SQL Time/Date functions ▬▬▬▬▬▬▬▬▬▬▬▬▬▬ ✦ ✦ ✦ ▬▬▬▬▬▬▬▬▬▬▬▬▬▬ UNION or UNION ALL UNION and UNION ALL are both used to retrieve records from multiple tables. Both UNION and UNION ALL are known as SET operators. …

Package.json In every package.json, there are two types of dependencies. → Normal dependencies are part of your production application. Let’s say you‘re using @material-ui/core for your form fields. The package will be used during development, but of course also by every end-user. In order to add a package under dependencies, while…