Python is an extremely readable and versatile programming language. While Python 2.7 and Python 3 share many similar capabilities, they should not be thought of as entirely interchangeable. This article will take you through the key differences to consider when choosing on whether to work in Python 2 or Python 3 for your development projects.
In SQL, primary keys serve as identifiers for individual rows in a table. In this tutorial, you’ll learn about primary keys and use a few different kinds to identify unique rows in database tables. Using some sample datasets, you’ll create primary keys on single columns and multiple columns, and use autoincrementing sequential keys.
El autor seleccionó a Open Internet/Free Speech Fund para recibir una donación como parte del programa Write for DOnations. Debido a características como su rápido rendimiento de…
Al trabajar con Node.js, es posible que se encuentre desarrollando un proyecto que almacene y consulte datos. En este caso, deberá elegir una solución de base de datos que tenga sentido para los datos y los tipos de consulta de su aplicación. A través…
The React Developer Tools browser extension gives you an interface for exploring the React component tree of your JavaScript app, along with the current props, state, and context for individual components. It can also show you which components are re-rendering and can generate graphs to show how long individual components take to render. In this tutorial, you will install React Developer Tools on the Google Chrome, then use it to analyze the performance of a sample app that analyzes text.
Flask is a lightweight Python web framework that provides useful tools and features for creating web applications in the Python Language. In this tutorial, you’ll build a small web application with Flask that demonstrates how to use web forms. The application will have a page for displaying messages that are stored in a Python list, and a page for adding new messages. You’ll also use message flashing to inform users of an error when they submit invalid data.
Arrays let you represent lists of data in your programs. Once you have data in an array, you can sort it, remove duplicates, reverse its order, extract sections of the array, or search through arrays for specific data. You can also convert an array to a string, transform one array of data into another, and roll up an array into a single value. In this tutorial, you’ll explore some of the most practical methods Ruby provides for working with data stored in arrays.
Go is a programming language that was designed for fast compilation, ease of programming, and efficient execution in production. This tutorial will guide you through installing Go on macOS and running your first program.
Der Autor hat Girls Who Code dazu ausgewählt, im Rahmen des Programms Write for DOnations eine Spende zu erhalten. GraphQL ist ein API-Standard, der von Facebook als Alternative zu…
Learn how to make HTTP requests in Go using the net/http package. Includes examples for GET, POST, headers, JSON parsing, and error handling.
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