Improve your JS/TS code quality using ESLint — JavaScript has a very flexible syntax by default. You can change the type of a variable, use single and double quotes for strings, have any number of spaces for indentation, omit the trailing semicolons, etc. However, only letting a project work is not enough, especially if you work in a…

Learn to validate your data in a flexible way with Pydantic — Pydantic is a popular Python library for data validation and settings management using type annotations. Unlike mypy which does static type checking for Python code, pydantic enforces type hints at runtime and provides user-friendly errors when data is invalid. When type annotations are appropriately added, pydantic normally does a good…

Learn a standard way to ensure your data quality — A JSON document can contain any number of key/value pairs. The key must be a string but the value can be any supported type, such as string, number, boolean, etc. The value can even be complex types like an array or nested object. This makes the JSON document both very…

Learn basic JSON operations with simple examples — JSON (JavaScript Object Notation) is a text format that is language-independent and is commonly used to interchange data between different applications. A good example is that the responses from APIs are normally in JSON format, therefore the backend and frontend can interchange data freely with no need to know the…

You don’t have to be a CSS master to build nice dialog boxes. — In a web application, dialog boxes are convenient tools to interact with users. It can attract users' attention if used properly and will make your webpage look neat. It needs some advanced CSS knowledge if you want to build a dialog box from scratch. However, using a framework like Angular…

Use context managers to make your code more robust and more Pythonic — We have been using the with keyword with the open function to create a context that will close the file after we have finished reading/writing. However, context managers in Python are not limited to managing external resources like file descriptors, database connections, threading locks, etc, they can be used to…

Learn an efficient way to work with large datasets — When you have a large dataset like a big CSV file or a big SQL table, it’s inefficient or even impossible to load all data into memory. Your computer will get stuck and your program will crash. It can be time-consuming and also quite frustrating to debug. Fortunately, iterators and…

Learn a better way to manage your sensitive data — An application normally needs some sensitive data like API keys, database passwords, private keys, etc. It’s common to store them as environment variables. However, this is not a good practice because the values of environment variables are set and stored as plain texts and thus can be revealed easily. If…

Learn to deal with GCP local authentications in minutes — If you work on the Google Cloud Platform (GCP), having your local environment set up properly can make your life much easier. It can be a headache to deal with all the nitty-gritty authentication issues especially when you have just started to work with GCP. Don’t worry, in this post…