How to run PHP code on a browser from CLI
This is a quick note for how to run PHP code from CLI and print the result on a web browser… php -S 127.0.0.1:8000 -t C:/app/php-folder
CSS/SASS techniques I’ve learned as a front-end developer
This post is a list of CSS/SASS techniques I’ve learned since I got my current soft engineer role, which is mostly concerned with front-end development. Before I started to work for my current position, I wasn’t absolutely confident with my CSS skills, so I had to teach myself techniques which were: not 100% clear to …
Error handling for chained ES6 Promises and multiple ES7 async/await
This post is about how to do error handling for multiple async calls in JavaScript. This may seem a simple topic, but I’d often struggled with this when I first learned about JavaScript. Before doing so, I’d like to quickly go over chained Promises and async/await in JavaScript. Chained Promise calls (“Why don’t you use …
Technical interview questions for React.js developer positions (+coding challenge tips)
In this post, I’ll show you all the technical questions I received in interviews for front end developer positions with React.js. Interview questions What is the state in React, and when is it useful? The state in a React component is a JavaScript object, which stores the state of the component. States are useful when …
How to start writing tests for Laravel apps with in-memory SQLite
In this post, I’ll write about how to configure Laravel apps for PHPUnit, and how to write basic tests. This post is meant to be a note for myself, but hopefully someone finds it helpful too. DB Driver First of all, this approach requires SQLite3 driver. So, you have to make sure that PHP on …
When does it make sense to use AWS EC2 instead of a rental server?
Recently I decided to teach myself AWS, but I soon started to wonder why and when to use AWS EC2 rather than renting a server from a conventional server provider. Why? the main reasons are… EC2 seems so convoluted with many acronyms and terms (e.g. AMI, ESB, EFS), all of which makes it difficult to …
Solving “upstream sent too big header while reading response header from upstream” on Nginx
If you’ve used Nginx, you may have come across this error. 2019/04/12 06:43:24 [error] 11365#0: *257 upstream sent too big header while reading response header from ups tream, client: 127.0.0.1, server: hiroki-example.com, request: “POST /payment HTTP/1.1”, upstream: “fastcgi://127.0.0.1:9000”, host: “hiroki-example.com”, referrer: “http://hiroki-example.com/payment” I’ve seen this many times, but haven’t really tried to understand it deeply. In …
How I configured Nginx on CentOS 7 with PHP 7.2 For Laravel apps
How to test React components with HTTP client (like axios)
When testing wit Jest, the test is working in a command line environment, which mimics the browser. However, this fake browser environment doesn’t allow us to interact with APIs outside of it. Then, how do we make AJAX requests while testing with Jest? Assuming that you use axios for calling API calls, moxios will be the …
How to test React components with form elements
I’ve been teaching myself how to write tests for React app. It seems that Enzyme is the de facto standard for it. Here is what I’ve learned for testing components with form elements (e.g. <input />). Setting up First of all, install the modules. npm install –save enzyme enzyme-adapter-react-16 NOTE: It depends on the version …