Express servers are written in JavaScript, and you can add type checking to one by writing it in TypeScript instead. The TypeScript compiler checks your code against the types you declare, then turns it into the JavaScript that Node.js runs.…
The Hostinger Premium offer works out to $2.99 a month, with a $143.52 first bill. That upfront total gives me a clearer basis for judging the advertised rate. Look beyond that first bill to the server work the hosting service…
`npm –version` reports npm, not which Node runtime `node` will launch. I value the separate answer from `node –version`: it reports the runtime itself. Choose a Node.js release line before changing the runtime. Compare the LTS and Current labels on…
PostgreSQL and Node.js install separately, and the only thing joining them is a connection string you write by hand. The installer never shows it to you, so a first failure looks like a broken database when the port number is…
Install PostgreSQL 18 on Ubuntu, create a login role, and query it from Node.js with the pg pool. Includes the authentication errors you hit first.
Getting PostgreSQL working with Node.js on macOS means installing the server, creating a database and a role, then connecting from your app. Most people hit the same role error on that first connection, and the fix is creating the right…
A reverted transaction should tell you which rule failed and let your test prove that result. This example uses Solidity custom errors and Hardhat to check an unauthorized withdrawal and a deposit below the contract minimum. Create a contract with…
A database is the better default when one accountable organization controls the application and needs fast queries, private data, and ordinary updates. A blockchain earns its extra coordination cost when independent parties must agree on a shared transaction history without…
A blockchain ledger is a shared record of transactions that network participants validate and replicate according to agreed rules. A traditional ledger usually has one owner who controls entries, permissions, corrections, and the authoritative copy. What does ledger mean in…
VS Code can edit Solidity files, but a useful setup needs language support and a compiler check. Install Solidity support in VS Code I compiled the small Counter contract below with solc so you can inspect the editor workflow through…
