What are the differences between lambda functions in Python and JavaScript?

What are the differences between lambda functions in Python and JavaScript?

In Python, lambda functions are anonymous functions defined with the lambda keyword, while in JavaScript, they are often created using arrow functions. Python's lambda can take any number of arguments but only one expression, whereas JavaScript's arrow functions can have multiple expressions if wrapped in curly braces.

Can you give me examples of both?

Sure! In Python, a lambda function to add two numbers would look like this: add = lambda x, y: x + y. In JavaScript, an equivalent arrow function would be: const add = (x, y) => x + y;.

Are there any performance differences?

Generally, the performance differences are minimal and often depend on the context in which they are used. However, JavaScript's engine optimizations can sometimes make arrow functions faster in certain scenarios.

Which one is more widely used?

It really depends on the context. Python is often used in data science and machine learning, while JavaScript is predominant in web development. Each has its own use cases where lambda functions shine.