Exercise

Define lambda expressions

Let's write some lambda expressions! You will be given three tasks: each will require you to define a lambda expression taking some values as arguments and using them to calculate a specific result.

Instructions 1/3

XP

1
Take \(x\) and return \(x^2\) if \(x > 0\) and \(0\), otherwise.
2
Take a list of integers nums and leave only even numbers.
3
Take strings s1, s2 and list their common characters.