What are some popular validation libraries in different programming languages?

What are some popular validation libraries in different programming languages?

There are several popular validation libraries across different languages. For example, in JavaScript, you have 'Joi' and 'Validator.js'. In Python, 'Cerberus' and 'Marshmallow' are widely used. What specific language are you interested in?

I'm interested in Python. Can you tell me more about Cerberus?

Cerberus is a lightweight and extensible data validation library for Python. It allows you to define schemas for your data and validate them easily. It supports various data types and custom validation rules. Would you like to see an example of how to use it?

Yes, please provide an example of using Cerberus.

Sure! Here's a simple example:

from cerberus import Validator

schema = {'name': {'type': 'string'}, 'age': {'type': 'integer', 'min': 18}}
validator = Validator(schema)

document = {'name': 'John', 'age': 25}
if validator.validate(document):
    print('Valid!')
else:
    print('Invalid:', validator.errors)

This code checks if the document meets the defined schema.