Creating Custom Errors in Go | DigitalOcean
Introduction Go provides two methods to create errors in the standard library, errors.New and fmt.Errorf. When communicating more complicated error information to your users, or to your future self when debugging, sometimes these two mechanisms are not enough to adequately capture and report what has happened. To convey this more complex error information and attain more functionality, we can impl
How To Install and Configure pgAdmin 4 in Server Mode on Ubuntu 18.04 | DigitalOcean
// Tutorial //How To Install and Configure pgAdmin 4 in Server Mode on Ubuntu 18.04 Introduction pgAdmin is an open-source administration and development platform for PostgreSQL and its related database management systems. Written in Python and jQuery, it supports all the features found in PostgreSQL. You can use pgAdmin to do everything from writing basic SQL queries to monitoring your databases
How To Get Started with Node.js and Express | DigitalOcean
Introduction Express is a web application framework for Node.js that allows you to spin up robust APIs and web servers in a much easier and cleaner way. It is a lightweight package that does not obscure the core Node.js features. In this article, you will install and use Express to build a web server. Prerequisites If you would like to follow along with this article, you will need: A local develop
DigitalOcean Introduces Kubernetes Product for Simple, Scalable Container Deployment and Orchestration
Press ReleasesDigitalOcean Introduces Kubernetes ProductDigitalOcean Introduces Kubernetes Product for Simple, Scalable Container Deployment and Orchestration New Product Provides the Easiest Kubernetes Deployment Experience to its One Million Plus Developers KUBECON EUROPE, Copenhagen, Denmark – May 2, 2018 – DigitalOcean, the cloud platform for developers and their teams, today announced its Dig
How to Block Unwanted SSH Login Attempts with PyFilter on Ubuntu 16.04 | DigitalOcean
// Tutorial //How to Block Unwanted SSH Login Attempts with PyFilter on Ubuntu 16.04 The author selected Code.org to receive a donation as part of the Write for DOnations program. Introduction Secure Shell (SSH) is a cryptographic network protocol for operating network services securely. It’s typically used for remote control of a computer system or for transferring files. When SSH is exposed to t
How To Use ProxySQL as a Load Balancer for MySQL on Ubuntu 16.04 | DigitalOcean
// Tutorial //How To Use ProxySQL as a Load Balancer for MySQL on Ubuntu 16.04 Introduction ProxySQL is an open-source MySQL proxy server, meaning it serves as an intermediary between a MySQL server and the applications that access its databases. ProxySQL can improve performance by distributing traffic among a pool of multiple database servers and also improve availability by automatically failing
Angular 5: Upgrading & Summary of New Features | DigitalOcean
{ "compileOnSave": false, "compilerOptions": { "outDir": "./dist/out-tsc", "sourceMap": true, "declaration": false, "moduleResolution": "node", "emitDecoratorMetadata": true, "experimentalDecorators": true, "target": "es5", "typeRoots": ["node_modules/@types"], "lib": ["es2017", "dom"] }, "angularCompilerOptions": { "preserveWhitespaces": false } } You can also set the option granularly on a per-c
E2E Testing Angular Applications with TestCafe ← Alligator.io
TestCafe is a free and open source Node.js tool for testing web applications. One of its main perks is that it takes about a minute to setup and to start testing (and it doesn’t use WebDriver). It works with most popular operating systems and browsers. Tests are written in JavaScript or TypeScript. In this article, we’ll cover testing Angular applications specifically. You will learn how to: Setup
Setup a React Environment Using webpack and Babel | DigitalOcean
Introduction React is a JavaScript library, by Facebook, that is used for building user interfaces. It is a library that offers so many advantages but one of the biggest setbacks is the steep learning curve. When I started out, one of the things that bugged me a whole lot was that most of the tutorials skipped over the React environment set-up. So here we go, this article is best suited for beginn
How To Monitor Nagios Alerts with Alerta on CentOS 7 | DigitalOcean
// Tutorial //How To Monitor Nagios Alerts with Alerta on CentOS 7 Introduction Alerta is a web application used to consolidate and de-duplicate alerts from multiple monitoring systems and visualize them on a single screen. Alerta can integrate with many well-known monitoring tools like Nagios, Zabbix, Sensu, InfluxData Kapacitor, and many others. In this tutorial you’ll set up Alerta and configur
How To Scrape Web Pages with Beautiful Soup and Python 3 | DigitalOcean
// Tutorial //How To Scrape Web Pages with Beautiful Soup and Python 3 Introduction Many data analysis, big data, and machine learning projects require scraping websites to gather the data that you’ll be working with. The Python programming language is widely used in the data science community, and therefore has an ecosystem of modules and tools that you can use in your own projects. In this tutor
How To Limit Resources Using cgroups on CentOS 6 | DigitalOcean
// Tutorial //How To Limit Resources Using cgroups on CentOS 6 Status: Deprecated This article covers a version of CentOS that is no longer supported. If you are currently operating a server running CentOS 6, we highly recommend upgrading or migrating to a supported version of CentOS. Reason: CentOS 6 reached end of life (EOL) on November 30th, 2020 and no longer receives security patches or updat
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NGINXConfig | DigitalOcean
Angular Service Worker: Dealing With Updates | DigitalOcean
Handling Route Parameters in Angular v2+ | DigitalOcean
How To Use Chart.js in Angular with ng2-charts | DigitalOcean
How To Resize Images in the Browser in Angular with ng2-img-max | DigitalOcean
How to Deal with Different Form Controls in Angular 2 | DigitalOcean