Published inLevel Up Coding·Dec 19, 2019Member-onlyHow to Set Up a Back End Project Using TypeScript and Node.jsWe’ll build a back end app starter using TypeScript, compile it to JavaScript(ES2019), and deploy it to Heroku. We will use: Node.js 12 Express: Web framework for Node.js Source code: d-dmytro/my-typescript-app Let’s create a folder for our project: mkdir my-typescript-app cd my-typescript-app Run npm init to create the package.json file…JavaScript6 min readJavaScript6 min read
May 27, 2018Handle Forms With ReactMy goal in this tutorial is to show how to structure React components around forms. In order to demonstrate this, I’d like to build a simple Newsletter subscription form. The Plan The form contains the email address input and the submit button. Once the user submits the form, we should validate the…React3 min readReact3 min read
May 27, 2018Command Line: process a file line by lineWe can use a nice perl one liner in the terminal to process files line by line. We can do many interesting things with it: Modify a file Count lines that match a regular expression Add a line before or after the matched line Remove or keep only the lines…Command Line3 min readCommand Line3 min read
May 27, 2018Command Line for a Web Developer: PipingBefore diving into advanced command line usage examples, I’d like to explain another basic concept — piping. Piping is the inter-process communication mechanism that allows to send the output of one program to another program. To pipe programs together in a shell, we use the vertical bar character |. …Command Line2 min readCommand Line2 min read
Apr 12, 2018Command Line for a Web Developer: Standard StreamsLet’s start with the basics. What do the standard streams do? A program running in a Unix-like operating system can read and write from/to one of the 3 standard streams: stdin (Standard Input) is the stream of data that goes into a program (e.g. when a program prompts you for…Programming3 min readProgramming3 min read
